Vulnerability Instance
Lookup for vulnerabilities affecting packages.
GET /api/vulnerabilities/63335?format=api
{ "url": "http://public2.vulnerablecode.io/api/vulnerabilities/63335?format=api", "vulnerability_id": "VCID-n6s1-tsx2-7fee", "summary": "Improper refcounting of soft token session objects could cause a use-after-free and crash (likely limited to a denial of service).", "aliases": [ { "alias": "CVE-2019-11756" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/371295?format=api", "purl": "pkg:alpm/archlinux/firefox@71.0-1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-6fvj-phnx-kfgs" }, { "vulnerability": "VCID-7hkk-2k6p-vyc7" }, { "vulnerability": "VCID-9v4g-hwwe-3ybg" }, { "vulnerability": "VCID-ap8s-63rs-jyff" }, { "vulnerability": "VCID-c4qs-a9kw-p3hc" }, { "vulnerability": "VCID-javq-3r82-73fq" }, { "vulnerability": "VCID-x12h-hqf2-37cc" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:alpm/archlinux/firefox@71.0-1" }, { "url": "http://public2.vulnerablecode.io/api/packages/584068?format=api", "purl": "pkg:deb/debian/firefox@71.0-1?distro=sid", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/firefox@71.0-1%3Fdistro=sid" }, { "url": "http://public2.vulnerablecode.io/api/packages/582059?format=api", "purl": "pkg:deb/debian/firefox@149.0-1?distro=sid", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/firefox@149.0-1%3Fdistro=sid" }, { "url": "http://public2.vulnerablecode.io/api/packages/1059611?format=api", "purl": "pkg:deb/debian/firefox@149.0.2-1?distro=sid", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/firefox@149.0.2-1%3Fdistro=sid" }, { "url": "http://public2.vulnerablecode.io/api/packages/86374?format=api", "purl": "pkg:mozilla/Firefox@71.0.0", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:mozilla/Firefox@71.0.0" } ], "affected_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/371301?format=api", "purl": "pkg:alpm/archlinux/firefox@70.0.1-3", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-3smq-ax5u-ryd3" }, { "vulnerability": "VCID-4sv2-j8zg-xkhf" }, { "vulnerability": "VCID-8xkk-qc7d-fqg2" }, { "vulnerability": "VCID-ex1b-2rdy-7qhw" }, { "vulnerability": "VCID-ftfg-b795-qyan" }, { "vulnerability": "VCID-n6s1-tsx2-7fee" }, { "vulnerability": "VCID-pws7-8qmm-hfes" }, { "vulnerability": "VCID-vzb9-aeqz-hybr" }, { "vulnerability": "VCID-zh2m-qyw5-dkgn" }, { "vulnerability": "VCID-zstj-sux9-ubdd" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:alpm/archlinux/firefox@70.0.1-3" }, { "url": "http://public2.vulnerablecode.io/api/packages/102718?format=api", "purl": "pkg:rpm/redhat/nspr@4.25.0-2?arch=el7_9", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-6fvj-phnx-kfgs" }, { "vulnerability": "VCID-7msj-wyd6-zkbe" }, { "vulnerability": "VCID-8qtg-h4km-bfg2" }, { "vulnerability": "VCID-k4a4-f1as-x3bj" }, { "vulnerability": "VCID-mx8t-s47w-wud5" }, { "vulnerability": "VCID-n6s1-tsx2-7fee" }, { "vulnerability": "VCID-rk7t-zjzg-eqar" }, { "vulnerability": "VCID-szzk-wxm2-cfgj" }, { "vulnerability": "VCID-vjas-pry4-93cz" }, { "vulnerability": "VCID-wavp-f4kn-j3cm" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/nspr@4.25.0-2%3Farch=el7_9" }, { "url": "http://public2.vulnerablecode.io/api/packages/102980?format=api", "purl": "pkg:rpm/redhat/nspr@4.25.0-2?arch=el8_2", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-6fvj-phnx-kfgs" }, { "vulnerability": "VCID-7msj-wyd6-zkbe" }, { "vulnerability": "VCID-k2s2-zkua-8ydy" }, { "vulnerability": "VCID-n6s1-tsx2-7fee" }, { "vulnerability": "VCID-vjas-pry4-93cz" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/nspr@4.25.0-2%3Farch=el8_2" }, { "url": "http://public2.vulnerablecode.io/api/packages/102739?format=api", "purl": "pkg:rpm/redhat/nss@3.36.0-9?arch=el7_6", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-7msj-wyd6-zkbe" }, { "vulnerability": "VCID-n6s1-tsx2-7fee" }, { "vulnerability": "VCID-szzk-wxm2-cfgj" }, { "vulnerability": "VCID-x1ty-wqph-gkak" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/nss@3.36.0-9%3Farch=el7_6" }, { "url": "http://public2.vulnerablecode.io/api/packages/102715?format=api", "purl": "pkg:rpm/redhat/nss@3.53.1-3?arch=el7_9", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-6fvj-phnx-kfgs" }, { "vulnerability": "VCID-7msj-wyd6-zkbe" }, { "vulnerability": "VCID-8qtg-h4km-bfg2" }, { "vulnerability": "VCID-k4a4-f1as-x3bj" }, { "vulnerability": "VCID-mx8t-s47w-wud5" }, { "vulnerability": "VCID-n6s1-tsx2-7fee" }, { "vulnerability": "VCID-rk7t-zjzg-eqar" }, { "vulnerability": "VCID-szzk-wxm2-cfgj" }, { "vulnerability": "VCID-vjas-pry4-93cz" }, { "vulnerability": "VCID-wavp-f4kn-j3cm" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/nss@3.53.1-3%3Farch=el7_9" }, { "url": "http://public2.vulnerablecode.io/api/packages/102979?format=api", "purl": "pkg:rpm/redhat/nss@3.53.1-11?arch=el8_2", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-6fvj-phnx-kfgs" }, { "vulnerability": "VCID-7msj-wyd6-zkbe" }, { "vulnerability": "VCID-k2s2-zkua-8ydy" }, { "vulnerability": "VCID-n6s1-tsx2-7fee" }, { "vulnerability": "VCID-vjas-pry4-93cz" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/nss@3.53.1-11%3Farch=el8_2" }, { "url": "http://public2.vulnerablecode.io/api/packages/102738?format=api", "purl": "pkg:rpm/redhat/nss-softokn@3.28.3-10?arch=el7_4", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-7msj-wyd6-zkbe" }, { "vulnerability": "VCID-n6s1-tsx2-7fee" }, { "vulnerability": "VCID-szzk-wxm2-cfgj" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/nss-softokn@3.28.3-10%3Farch=el7_4" }, { "url": "http://public2.vulnerablecode.io/api/packages/102736?format=api", "purl": "pkg:rpm/redhat/nss-softokn@3.36.0-7?arch=el7_6", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-7msj-wyd6-zkbe" }, { "vulnerability": "VCID-n6s1-tsx2-7fee" }, { "vulnerability": "VCID-szzk-wxm2-cfgj" }, { "vulnerability": "VCID-x1ty-wqph-gkak" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/nss-softokn@3.36.0-7%3Farch=el7_6" }, { "url": "http://public2.vulnerablecode.io/api/packages/102737?format=api", "purl": "pkg:rpm/redhat/nss-softokn@3.44.0-9?arch=el7_7", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-7msj-wyd6-zkbe" }, { "vulnerability": "VCID-n6s1-tsx2-7fee" }, { "vulnerability": "VCID-szzk-wxm2-cfgj" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/nss-softokn@3.44.0-9%3Farch=el7_7" }, { "url": "http://public2.vulnerablecode.io/api/packages/102717?format=api", "purl": "pkg:rpm/redhat/nss-softokn@3.53.1-6?arch=el7_9", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-6fvj-phnx-kfgs" }, { "vulnerability": "VCID-7msj-wyd6-zkbe" }, { "vulnerability": "VCID-8qtg-h4km-bfg2" }, { "vulnerability": "VCID-k4a4-f1as-x3bj" }, { "vulnerability": "VCID-mx8t-s47w-wud5" }, { "vulnerability": "VCID-n6s1-tsx2-7fee" }, { "vulnerability": "VCID-rk7t-zjzg-eqar" }, { "vulnerability": "VCID-szzk-wxm2-cfgj" }, { "vulnerability": "VCID-vjas-pry4-93cz" }, { "vulnerability": "VCID-wavp-f4kn-j3cm" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/nss-softokn@3.53.1-6%3Farch=el7_9" }, { "url": "http://public2.vulnerablecode.io/api/packages/102716?format=api", "purl": "pkg:rpm/redhat/nss-util@3.53.1-1?arch=el7_9", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-6fvj-phnx-kfgs" }, { "vulnerability": "VCID-7msj-wyd6-zkbe" }, { "vulnerability": "VCID-8qtg-h4km-bfg2" }, { "vulnerability": "VCID-k4a4-f1as-x3bj" }, { "vulnerability": "VCID-mx8t-s47w-wud5" }, { "vulnerability": "VCID-n6s1-tsx2-7fee" }, { "vulnerability": "VCID-rk7t-zjzg-eqar" }, { "vulnerability": "VCID-szzk-wxm2-cfgj" }, { "vulnerability": "VCID-vjas-pry4-93cz" }, { "vulnerability": "VCID-wavp-f4kn-j3cm" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/nss-util@3.53.1-1%3Farch=el7_9" } ], "references": [ { "reference_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-11756.json", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.1", "scoring_system": "cvssv3", "scoring_elements": "CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H" } ], "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-11756.json" }, { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2019-11756", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00256", "scoring_system": "epss", "scoring_elements": "0.48895", "published_at": "2026-04-01T12:55:00Z" }, { "value": "0.00256", "scoring_system": "epss", "scoring_elements": "0.49008", "published_at": "2026-04-16T12:55:00Z" }, { "value": "0.00256", "scoring_system": "epss", "scoring_elements": "0.48955", "published_at": "2026-04-12T12:55:00Z" }, { "value": "0.00256", "scoring_system": "epss", "scoring_elements": "0.48962", "published_at": "2026-04-13T12:55:00Z" }, { "value": "0.00256", "scoring_system": "epss", "scoring_elements": "0.48932", "published_at": "2026-04-02T12:55:00Z" }, { "value": "0.00256", "scoring_system": "epss", "scoring_elements": "0.48958", "published_at": "2026-04-04T12:55:00Z" }, { "value": "0.00256", "scoring_system": "epss", "scoring_elements": "0.48912", "published_at": "2026-04-07T12:55:00Z" }, { "value": "0.00256", "scoring_system": "epss", "scoring_elements": "0.48966", "published_at": "2026-04-08T12:55:00Z" }, { "value": "0.00256", "scoring_system": "epss", "scoring_elements": "0.48963", "published_at": "2026-04-09T12:55:00Z" }, { "value": "0.00256", "scoring_system": "epss", "scoring_elements": "0.4898", "published_at": "2026-04-11T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2019-11756" }, { "reference_url": "https://bugzilla.redhat.com/show_bug.cgi?id=1774835", "reference_id": "1774835", "reference_type": "", "scores": [], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1774835" }, { "reference_url": "https://security.archlinux.org/ASA-201912-1", "reference_id": "ASA-201912-1", "reference_type": "", "scores": [], "url": "https://security.archlinux.org/ASA-201912-1" }, { "reference_url": "https://security.archlinux.org/AVG-1071", "reference_id": "AVG-1071", "reference_type": "", "scores": [ { "value": "Critical", "scoring_system": "archlinux", "scoring_elements": "" } ], "url": "https://security.archlinux.org/AVG-1071" }, { "reference_url": "https://www.mozilla.org/en-US/security/advisories/mfsa2019-36", "reference_id": "mfsa2019-36", "reference_type": "", "scores": [ { "value": "high", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://www.mozilla.org/en-US/security/advisories/mfsa2019-36" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2020:3280", "reference_id": "RHSA-2020:3280", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2020:3280" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2020:4076", "reference_id": "RHSA-2020:4076", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2020:4076" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2021:0758", "reference_id": "RHSA-2021:0758", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2021:0758" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2021:0876", "reference_id": "RHSA-2021:0876", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2021:0876" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2021:0949", "reference_id": "RHSA-2021:0949", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2021:0949" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2021:1026", "reference_id": "RHSA-2021:1026", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2021:1026" }, { "reference_url": "https://usn.ubuntu.com/4216-1/", "reference_id": "USN-4216-1", "reference_type": "", "scores": [], "url": "https://usn.ubuntu.com/4216-1/" }, { "reference_url": "https://usn.ubuntu.com/4216-2/", "reference_id": "USN-4216-2", "reference_type": "", "scores": [], "url": "https://usn.ubuntu.com/4216-2/" } ], "weaknesses": [ { "cwe_id": 416, "name": "Use After Free", "description": "Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code." } ], "exploits": [], "severity_range_score": "7.0 - 10.0", "exploitability": "0.5", "weighted_severity": "9.0", "risk_score": 4.5, "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-n6s1-tsx2-7fee" }