Vulnerability Instance
Lookup for vulnerabilities affecting packages.
GET /api/vulnerabilities/349238?format=api
{ "url": "http://public2.vulnerablecode.io/api/vulnerabilities/349238?format=api", "vulnerability_id": "VCID-ph4w-4hud-mkck", "summary": "An issue was discovered in Mbed TLS 3.x before 3.6.6. An out-of-bounds read vulnerability in mbedtls_ccm_finish() in library/ccm.c allows attackers to obtain adjacent CCM context data via invocation of the multipart CCM API with an oversized tag_len parameter. This is caused by missing validation of the tag_len parameter against the size of the internal 16-byte authentication buffer. The issue affects the public multipart CCM API in Mbed TLS 3.x, where mbedtls_ccm_finish() can be invoked directly by applications. In Mbed TLS 4.x versions prior to the fix, the same missing validation exists in the internal implementation; however, the function is not exposed as part of the public API. Exploitation requires application-level invocation of the multipart CCM API.", "aliases": [ { "alias": "CVE-2026-34876" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/930541?format=api", "purl": "pkg:deb/debian/mbedtls@0?distro=trixie", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/mbedtls@0%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/930542?format=api", "purl": "pkg:deb/debian/mbedtls@2.16.9-0.1?distro=trixie", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5bxk-rknm-zfhc" }, { "vulnerability": "VCID-f1fz-b8b6-dfb8" }, { "vulnerability": "VCID-gvkn-6e2m-dyez" }, { "vulnerability": "VCID-k8w1-nrjy-wfbe" }, { "vulnerability": "VCID-kchn-2wez-bbb2" }, { "vulnerability": "VCID-pj6w-rufw-nqgd" }, { "vulnerability": "VCID-vp4q-81cq-33cw" }, { "vulnerability": "VCID-vs6q-c4ug-xfer" }, { "vulnerability": "VCID-wsvw-6tmk-3kdj" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/mbedtls@2.16.9-0.1%3Fdistro=trixie" } ], "affected_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/930540?format=api", "purl": "pkg:deb/debian/mbedtls@2.28.3-1?distro=trixie", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-4sbv-dqyv-6baw" }, { "vulnerability": "VCID-5bxk-rknm-zfhc" }, { "vulnerability": "VCID-7ppw-f9jy-k7ae" }, { "vulnerability": "VCID-7v3a-5q44-cucz" }, { "vulnerability": "VCID-98cg-wuhp-qudq" }, { "vulnerability": "VCID-f1fz-b8b6-dfb8" }, { "vulnerability": "VCID-gvkn-6e2m-dyez" }, { "vulnerability": "VCID-jeen-6u3v-8qab" }, { "vulnerability": "VCID-kchn-2wez-bbb2" }, { "vulnerability": "VCID-ph4w-4hud-mkck" }, { "vulnerability": "VCID-pj6w-rufw-nqgd" }, { "vulnerability": "VCID-vp4q-81cq-33cw" }, { "vulnerability": "VCID-vs6q-c4ug-xfer" }, { "vulnerability": "VCID-wsvw-6tmk-3kdj" }, { "vulnerability": "VCID-x8et-cun9-6kgz" }, { "vulnerability": "VCID-zpq1-dwvf-8ka2" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/mbedtls@2.28.3-1%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/1026157?format=api", "purl": "pkg:deb/debian/mbedtls@2.28.3-1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-4sbv-dqyv-6baw" }, { "vulnerability": "VCID-5bxk-rknm-zfhc" }, { "vulnerability": "VCID-7ppw-f9jy-k7ae" }, { "vulnerability": "VCID-7v3a-5q44-cucz" }, { "vulnerability": "VCID-98cg-wuhp-qudq" }, { "vulnerability": "VCID-f1fz-b8b6-dfb8" }, { "vulnerability": "VCID-gvkn-6e2m-dyez" }, { "vulnerability": "VCID-jeen-6u3v-8qab" }, { "vulnerability": "VCID-kchn-2wez-bbb2" }, { "vulnerability": "VCID-ph4w-4hud-mkck" }, { "vulnerability": "VCID-pj6w-rufw-nqgd" }, { "vulnerability": "VCID-vp4q-81cq-33cw" }, { "vulnerability": "VCID-vs6q-c4ug-xfer" }, { "vulnerability": "VCID-wsvw-6tmk-3kdj" }, { "vulnerability": "VCID-x8et-cun9-6kgz" }, { "vulnerability": "VCID-zpq1-dwvf-8ka2" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/mbedtls@2.28.3-1" }, { "url": "http://public2.vulnerablecode.io/api/packages/930544?format=api", "purl": "pkg:deb/debian/mbedtls@3.6.5-0.1~deb13u1?distro=trixie", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-4sbv-dqyv-6baw" }, { "vulnerability": "VCID-jeen-6u3v-8qab" }, { "vulnerability": "VCID-ph4w-4hud-mkck" }, { "vulnerability": "VCID-x8et-cun9-6kgz" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/mbedtls@3.6.5-0.1~deb13u1%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/1026158?format=api", "purl": "pkg:deb/debian/mbedtls@3.6.5-0.1~deb13u1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-4sbv-dqyv-6baw" }, { "vulnerability": "VCID-jeen-6u3v-8qab" }, { "vulnerability": "VCID-ph4w-4hud-mkck" }, { "vulnerability": "VCID-x8et-cun9-6kgz" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/mbedtls@3.6.5-0.1~deb13u1" }, { "url": "http://public2.vulnerablecode.io/api/packages/930543?format=api", "purl": "pkg:deb/debian/mbedtls@3.6.5-0.1?distro=trixie", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-4sbv-dqyv-6baw" }, { "vulnerability": "VCID-jeen-6u3v-8qab" }, { "vulnerability": "VCID-ph4w-4hud-mkck" }, { "vulnerability": "VCID-x8et-cun9-6kgz" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/mbedtls@3.6.5-0.1%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/1056756?format=api", "purl": "pkg:deb/debian/mbedtls@3.6.5-0.1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-4sbv-dqyv-6baw" }, { "vulnerability": "VCID-jeen-6u3v-8qab" }, { "vulnerability": "VCID-ph4w-4hud-mkck" }, { "vulnerability": "VCID-x8et-cun9-6kgz" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/mbedtls@3.6.5-0.1" } ], "references": [ { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2026-34876", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00015", "scoring_system": "epss", "scoring_elements": "0.03384", "published_at": "2026-04-07T12:55:00Z" }, { "value": "0.00017", "scoring_system": "epss", "scoring_elements": "0.03993", "published_at": "2026-04-04T12:55:00Z" }, { "value": "0.00018", "scoring_system": "epss", "scoring_elements": "0.0492", "published_at": "2026-04-24T12:55:00Z" }, { "value": "0.00018", "scoring_system": "epss", "scoring_elements": "0.0474", "published_at": "2026-04-18T12:55:00Z" }, { "value": "0.00018", "scoring_system": "epss", "scoring_elements": "0.04959", "published_at": "2026-04-26T12:55:00Z" }, { "value": "0.00018", "scoring_system": "epss", "scoring_elements": "0.04885", "published_at": "2026-04-21T12:55:00Z" }, { "value": "0.00018", "scoring_system": "epss", "scoring_elements": "0.04821", "published_at": "2026-04-11T12:55:00Z" }, { "value": "0.00018", "scoring_system": "epss", "scoring_elements": "0.04832", "published_at": "2026-04-09T12:55:00Z" }, { "value": "0.00018", "scoring_system": "epss", "scoring_elements": "0.04798", "published_at": "2026-04-12T12:55:00Z" }, { "value": "0.00018", "scoring_system": "epss", "scoring_elements": "0.04778", "published_at": "2026-04-13T12:55:00Z" }, { "value": "0.00018", "scoring_system": "epss", "scoring_elements": "0.04731", "published_at": "2026-04-16T12:55:00Z" }, { "value": "0.00024", "scoring_system": "epss", "scoring_elements": "0.06676", "published_at": "2026-04-29T12:55:00Z" }, { "value": "0.00026", "scoring_system": "epss", "scoring_elements": "0.07487", "published_at": "2026-05-07T12:55:00Z" }, { "value": "0.00026", "scoring_system": "epss", "scoring_elements": "0.07337", "published_at": "2026-05-05T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-34876" }, { "reference_url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-34876", "reference_id": "", "reference_type": "", "scores": [], "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-34876" }, { "reference_url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1132577", "reference_id": "1132577", "reference_type": "", "scores": [], "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1132577" }, { "reference_url": "https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-ccm-finish-boundary-check/", "reference_id": "mbedtls-security-advisory-2026-03-ccm-finish-boundary-check", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-02T15:53:54Z/" } ], "url": "https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-ccm-finish-boundary-check/" }, { "reference_url": "https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/", "reference_id": "security-advisories", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-02T15:53:54Z/" } ], "url": "https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/" } ], "weaknesses": [], "exploits": [], "severity_range_score": "7.5 - 7.5", "exploitability": "0.5", "weighted_severity": "3.8", "risk_score": 1.9, "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-ph4w-4hud-mkck" }