Vulnerability Instance
Lookup for vulnerabilities affecting packages.
GET /api/vulnerabilities/90861?format=api
{ "url": "http://public2.vulnerablecode.io/api/vulnerabilities/90861?format=api", "vulnerability_id": "VCID-sfzh-hn56-hbak", "summary": "Buffer overflow vulnerability in Zlib::GzipReader\nA buffer overflow vulnerability exists in Zlib::GzipReader.\nThis vulnerability has been assigned the CVE identifier\nCVE-2026-27820. We recommend upgrading the zlib gem.\n\n## Details\n\nThe zstream_buffer_ungets function prepends caller-provided bytes\nahead of previously produced output but fails to guarantee the\nbacking Ruby string has enough capacity before the memmove shifts\nthe existing data. This can lead to memory corruption when the\nbuffer length exceeds capacity.\n\n## Recommended action\n\nWe recommend to update the zlib gem to version 3.2.3 or later.\nIn order to ensure compatibility with bundled version in older\nRuby series, you may update as follows instead:\n\n* For Ruby 3.2 users: Update to zlib 3.0.1\n* For Ruby 3.3 users: Update to zlib 3.1.2\n* You can use gem update zlib to update it. If you are using\n bundler, please add gem \"zlib\", \">= 3.2.3\" to your Gemfile.\n\n## Affected versions:\n\nzlib gem 3.2.2 or lower\n\n## Credits\n\nThanks to calysteon for reporting this issue. Also thanks to\nnobu for creating the patch.", "aliases": [ { "alias": "CVE-2026-27820" }, { "alias": "GHSA-g857-hhfv-j68w" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/552774?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=armv7&distroversion=edge&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=armv7&distroversion=edge&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/552777?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=riscv64&distroversion=edge&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=riscv64&distroversion=edge&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/552780?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=x86_64&distroversion=edge&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=x86_64&distroversion=edge&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/969140?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=s390x&distroversion=v3.23&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=s390x&distroversion=v3.23&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/552772?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=aarch64&distroversion=edge&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=aarch64&distroversion=edge&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/552773?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=armhf&distroversion=edge&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=armhf&distroversion=edge&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/552775?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=loongarch64&distroversion=edge&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=loongarch64&distroversion=edge&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/552776?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=ppc64le&distroversion=edge&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=ppc64le&distroversion=edge&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/552778?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=s390x&distroversion=edge&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=s390x&distroversion=edge&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/552779?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=x86&distroversion=edge&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=x86&distroversion=edge&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/969138?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=ppc64le&distroversion=v3.23&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=ppc64le&distroversion=v3.23&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/969141?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=x86&distroversion=v3.23&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=x86&distroversion=v3.23&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/969134?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=aarch64&distroversion=v3.23&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=aarch64&distroversion=v3.23&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/969142?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=x86_64&distroversion=v3.23&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=x86_64&distroversion=v3.23&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/969136?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=armv7&distroversion=v3.23&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=armv7&distroversion=v3.23&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/969137?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=loongarch64&distroversion=v3.23&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=loongarch64&distroversion=v3.23&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/969139?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=riscv64&distroversion=v3.23&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=riscv64&distroversion=v3.23&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/969135?format=api", "purl": "pkg:apk/alpine/ruby@3.4.9-r0?arch=armhf&distroversion=v3.23&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/ruby@3.4.9-r0%3Farch=armhf&distroversion=v3.23&reponame=main" }, { "url": "http://public2.vulnerablecode.io/api/packages/1067959?format=api", "purl": "pkg:gem/zlib@3.0.1", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@3.0.1" }, { "url": "http://public2.vulnerablecode.io/api/packages/1067958?format=api", "purl": "pkg:gem/zlib@3.1.2", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@3.1.2" }, { "url": "http://public2.vulnerablecode.io/api/packages/1067957?format=api", "purl": "pkg:gem/zlib@3.2.3", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@3.2.3" } ], "affected_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/141426?format=api", "purl": "pkg:gem/zlib@0.0.1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-sfzh-hn56-hbak" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@0.0.1" }, { "url": "http://public2.vulnerablecode.io/api/packages/141427?format=api", "purl": "pkg:gem/zlib@0.1.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-sfzh-hn56-hbak" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@0.1.0" }, { "url": "http://public2.vulnerablecode.io/api/packages/141428?format=api", "purl": "pkg:gem/zlib@1.0.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-sfzh-hn56-hbak" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@1.0.0" }, { "url": "http://public2.vulnerablecode.io/api/packages/141429?format=api", "purl": "pkg:gem/zlib@1.1.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-sfzh-hn56-hbak" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@1.1.0" }, { "url": "http://public2.vulnerablecode.io/api/packages/141430?format=api", "purl": "pkg:gem/zlib@2.0.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-sfzh-hn56-hbak" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@2.0.0" }, { "url": "http://public2.vulnerablecode.io/api/packages/141431?format=api", "purl": "pkg:gem/zlib@2.1.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-sfzh-hn56-hbak" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@2.1.0" }, { "url": "http://public2.vulnerablecode.io/api/packages/141432?format=api", "purl": "pkg:gem/zlib@2.1.1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-sfzh-hn56-hbak" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@2.1.1" }, { "url": "http://public2.vulnerablecode.io/api/packages/141433?format=api", "purl": "pkg:gem/zlib@3.0.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-sfzh-hn56-hbak" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@3.0.0" }, { "url": "http://public2.vulnerablecode.io/api/packages/130696?format=api", "purl": "pkg:gem/zlib@3.1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-sfzh-hn56-hbak" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@3.1" }, { "url": "http://public2.vulnerablecode.io/api/packages/141434?format=api", "purl": "pkg:gem/zlib@3.1.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-sfzh-hn56-hbak" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@3.1.0" }, { "url": "http://public2.vulnerablecode.io/api/packages/141435?format=api", "purl": "pkg:gem/zlib@3.1.1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-sfzh-hn56-hbak" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@3.1.1" }, { "url": "http://public2.vulnerablecode.io/api/packages/141436?format=api", "purl": "pkg:gem/zlib@3.2.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-sfzh-hn56-hbak" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@3.2.0" }, { "url": "http://public2.vulnerablecode.io/api/packages/130697?format=api", "purl": "pkg:gem/zlib@3.2", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-sfzh-hn56-hbak" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@3.2" }, { "url": "http://public2.vulnerablecode.io/api/packages/141437?format=api", "purl": "pkg:gem/zlib@3.2.1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-sfzh-hn56-hbak" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@3.2.1" }, { "url": "http://public2.vulnerablecode.io/api/packages/141438?format=api", "purl": "pkg:gem/zlib@3.2.2", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-sfzh-hn56-hbak" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/zlib@3.2.2" }, { "url": "http://public2.vulnerablecode.io/api/packages/1072974?format=api", "purl": "pkg:rpm/redhat/ruby3-3-main@3.3.10-23.1?arch=hum1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-1vp9-6q85-5ffv" }, { "vulnerability": "VCID-2sv2-6snv-2bd3" }, { "vulnerability": "VCID-4qm3-nbsk-73he" }, { "vulnerability": "VCID-4yvc-uzev-wua4" }, { "vulnerability": "VCID-5xez-skrj-b3h4" }, { "vulnerability": "VCID-91b7-xx8t-rqhr" }, { "vulnerability": "VCID-9x9w-2k98-wydm" }, { "vulnerability": "VCID-a15m-bcma-vfa7" }, { "vulnerability": "VCID-arjz-geyr-q7e3" }, { "vulnerability": "VCID-bdar-wgfe-qqgf" }, { "vulnerability": "VCID-ea13-mua4-1fb9" }, { "vulnerability": "VCID-fw7k-88kf-1kgg" }, { "vulnerability": "VCID-g7ju-q41v-wyhd" }, { "vulnerability": "VCID-jj3a-fpsa-a7at" }, { "vulnerability": "VCID-pegr-f5mh-ekdz" }, { "vulnerability": "VCID-qyz5-zmnt-qucy" }, { "vulnerability": "VCID-rwak-wvuw-qbcg" }, { "vulnerability": "VCID-sf98-mryd-yfb3" }, { "vulnerability": "VCID-sfzh-hn56-hbak" }, { "vulnerability": "VCID-t9y5-hd9b-bkc4" }, { "vulnerability": "VCID-vcz9-dvf4-47am" }, { "vulnerability": "VCID-wzdf-d9fv-u3hh" }, { "vulnerability": "VCID-x126-x9qm-e7d3" }, { "vulnerability": "VCID-xkd6-jvma-skfk" }, { "vulnerability": "VCID-y56y-5am7-wkhr" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/ruby3-3-main@3.3.10-23.1%3Farch=hum1" }, { "url": "http://public2.vulnerablecode.io/api/packages/1072973?format=api", "purl": "pkg:rpm/redhat/ruby3-4-main@3.4.8-31.1?arch=hum1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-1vp9-6q85-5ffv" }, { "vulnerability": "VCID-2sv2-6snv-2bd3" }, { "vulnerability": "VCID-4qm3-nbsk-73he" }, { "vulnerability": "VCID-4yvc-uzev-wua4" }, { "vulnerability": "VCID-5xez-skrj-b3h4" }, { "vulnerability": "VCID-91b7-xx8t-rqhr" }, { "vulnerability": "VCID-9x9w-2k98-wydm" }, { "vulnerability": "VCID-a15m-bcma-vfa7" }, { "vulnerability": "VCID-arjz-geyr-q7e3" }, { "vulnerability": "VCID-bdar-wgfe-qqgf" }, { "vulnerability": "VCID-ea13-mua4-1fb9" }, { "vulnerability": "VCID-fw7k-88kf-1kgg" }, { "vulnerability": "VCID-g7ju-q41v-wyhd" }, { "vulnerability": "VCID-jj3a-fpsa-a7at" }, { "vulnerability": "VCID-pegr-f5mh-ekdz" }, { "vulnerability": "VCID-qyz5-zmnt-qucy" }, { "vulnerability": "VCID-rwak-wvuw-qbcg" }, { "vulnerability": "VCID-sf98-mryd-yfb3" }, { "vulnerability": "VCID-sfzh-hn56-hbak" }, { "vulnerability": "VCID-t9y5-hd9b-bkc4" }, { "vulnerability": "VCID-vcz9-dvf4-47am" }, { "vulnerability": "VCID-wzdf-d9fv-u3hh" }, { "vulnerability": "VCID-x126-x9qm-e7d3" }, { "vulnerability": "VCID-xkd6-jvma-skfk" }, { "vulnerability": "VCID-y56y-5am7-wkhr" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/ruby3-4-main@3.4.8-31.1%3Farch=hum1" }, { "url": "http://public2.vulnerablecode.io/api/packages/1072972?format=api", "purl": "pkg:rpm/redhat/ruby4-0-main@4.0.0-33.3?arch=hum1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-1vp9-6q85-5ffv" }, { "vulnerability": "VCID-2sv2-6snv-2bd3" }, { "vulnerability": "VCID-4qm3-nbsk-73he" }, { "vulnerability": "VCID-4yvc-uzev-wua4" }, { "vulnerability": "VCID-5xez-skrj-b3h4" }, { "vulnerability": "VCID-91b7-xx8t-rqhr" }, { "vulnerability": "VCID-9x9w-2k98-wydm" }, { "vulnerability": "VCID-a15m-bcma-vfa7" }, { "vulnerability": "VCID-arjz-geyr-q7e3" }, { "vulnerability": "VCID-bdar-wgfe-qqgf" }, { "vulnerability": "VCID-ea13-mua4-1fb9" }, { "vulnerability": "VCID-fw7k-88kf-1kgg" }, { "vulnerability": "VCID-g7ju-q41v-wyhd" }, { "vulnerability": "VCID-jj3a-fpsa-a7at" }, { "vulnerability": "VCID-pegr-f5mh-ekdz" }, { "vulnerability": "VCID-qyz5-zmnt-qucy" }, { "vulnerability": "VCID-rwak-wvuw-qbcg" }, { "vulnerability": "VCID-sf98-mryd-yfb3" }, { "vulnerability": "VCID-sfzh-hn56-hbak" }, { "vulnerability": "VCID-t9y5-hd9b-bkc4" }, { "vulnerability": "VCID-vcz9-dvf4-47am" }, { "vulnerability": "VCID-wzdf-d9fv-u3hh" }, { "vulnerability": "VCID-x126-x9qm-e7d3" }, { "vulnerability": "VCID-xkd6-jvma-skfk" }, { "vulnerability": "VCID-y56y-5am7-wkhr" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/ruby4-0-main@4.0.0-33.3%3Farch=hum1" } ], "references": [ { "reference_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-27820.json", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.6", "scoring_system": "cvssv3", "scoring_elements": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L" } ], "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-27820.json" }, { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2026-27820", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00013", "scoring_system": "epss", "scoring_elements": "0.02079", "published_at": "2026-05-05T12:55:00Z" }, { "value": "0.00013", "scoring_system": "epss", "scoring_elements": "0.02126", "published_at": "2026-04-29T12:55:00Z" }, { "value": "0.00014", "scoring_system": "epss", "scoring_elements": "0.02466", "published_at": "2026-04-21T12:55:00Z" }, { "value": "0.00018", "scoring_system": "epss", "scoring_elements": "0.04667", "published_at": "2026-04-26T12:55:00Z" }, { "value": "0.00018", "scoring_system": "epss", "scoring_elements": "0.04633", "published_at": "2026-04-24T12:55:00Z" }, { "value": "0.00042", "scoring_system": "epss", "scoring_elements": "0.12746", "published_at": "2026-04-18T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-27820" }, { "reference_url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-27820", "reference_id": "", "reference_type": "", "scores": [], "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-27820" }, { "reference_url": "https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml", "reference_id": "", "reference_type": "", "scores": [ { "value": "8.8", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H" } ], "url": "https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml" }, { "reference_url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/zlib/CVE-2026-27820.yml", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.9", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/zlib/CVE-2026-27820.yml" }, { "reference_url": "https://github.com/ruby/zlib", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.9", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/ruby/zlib" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27820", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.9", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27820" }, { "reference_url": "https://www.ruby-lang.org/en/news/2026/03/05/buffer-overflow-zlib-cve-2026-27820", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.9", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://www.ruby-lang.org/en/news/2026/03/05/buffer-overflow-zlib-cve-2026-27820" }, { "reference_url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1134341", "reference_id": "1134341", "reference_type": "", "scores": [], "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1134341" }, { "reference_url": "https://bugzilla.redhat.com/show_bug.cgi?id=2459002", "reference_id": "2459002", "reference_type": "", "scores": [], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2459002" }, { "reference_url": "https://hackerone.com/reports/3467067", "reference_id": "3467067", "reference_type": "", "scores": [ { "value": "1.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U" }, { "value": "5.9", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-16T18:20:13Z/" } ], "url": "https://hackerone.com/reports/3467067" }, { "reference_url": "https://github.com/advisories/GHSA-g857-hhfv-j68w", "reference_id": "GHSA-g857-hhfv-j68w", "reference_type": "", "scores": [ { "value": "MODERATE", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-g857-hhfv-j68w" }, { "reference_url": "https://github.com/ruby/zlib/security/advisories/GHSA-g857-hhfv-j68w", "reference_id": "GHSA-g857-hhfv-j68w", "reference_type": "", "scores": [ { "value": "MODERATE", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" }, { "value": "1.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U" }, { "value": "5.9", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-16T18:20:13Z/" } ], "url": "https://github.com/ruby/zlib/security/advisories/GHSA-g857-hhfv-j68w" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2026:7305", "reference_id": "RHSA-2026:7305", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2026:7305" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2026:7307", "reference_id": "RHSA-2026:7307", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2026:7307" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2026:8838", "reference_id": "RHSA-2026:8838", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2026:8838" } ], "weaknesses": [ { "cwe_id": 120, "name": "Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')", "description": "The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow." }, { "cwe_id": 131, "name": "Incorrect Calculation of Buffer Size", "description": "The product does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow." } ], "exploits": [], "severity_range_score": "1.7 - 8.8", "exploitability": "0.5", "weighted_severity": "6.2", "risk_score": 3.1, "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-sfzh-hn56-hbak" }