Vulnerability Instance
Lookup for vulnerabilities affecting packages.
GET /api/vulnerabilities/22837?format=api
{ "url": "http://public2.vulnerablecode.io/api/vulnerabilities/22837?format=api", "vulnerability_id": "VCID-15hj-tpge-5qed", "summary": "fast-xml-parser has stack overflow in XMLBuilder with preserveOrder\nApplication crashes with stack overflow when user use XML builder with `prserveOrder:true` for following or similar input\n\n```\n[{\n'foo': [\n{ 'bar': [{ '@_V': 'baz' }] }\n]\n}]\n```\n\nCause: `arrToStr` was not validating if the input is an array or a string and treating all non-array values as text content.\n_What kind of vulnerability is it? Who is impacted?_", "aliases": [ { "alias": "CVE-2026-27942" }, { "alias": "GHSA-fj3w-jwp8-x2g3" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/72846?format=api", "purl": "pkg:npm/fast-xml-parser@4.5.4", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:npm/fast-xml-parser@4.5.4" }, { "url": "http://public2.vulnerablecode.io/api/packages/73112?format=api", "purl": "pkg:npm/fast-xml-parser@5.3.8", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:npm/fast-xml-parser@5.3.8" } ], "affected_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/73111?format=api", "purl": "pkg:npm/fast-xml-parser@4.0.0-beta.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-15hj-tpge-5qed" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:npm/fast-xml-parser@4.0.0-beta.0" }, { "url": "http://public2.vulnerablecode.io/api/packages/72845?format=api", "purl": "pkg:npm/fast-xml-parser@5.0.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-15hj-tpge-5qed" }, { "vulnerability": "VCID-4w7s-yjr2-pqcj" }, { "vulnerability": "VCID-bu27-qt1w-4fcj" }, { "vulnerability": "VCID-k3hb-6max-4yd1" }, { "vulnerability": "VCID-zuzg-xza6-b7b6" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:npm/fast-xml-parser@5.0.0" } ], "references": [ { "reference_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-27942.json", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" } ], "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-27942.json" }, { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2026-27942", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00018", "scoring_system": "epss", "scoring_elements": "0.05197", "published_at": "2026-05-30T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-27942" }, { "reference_url": "https://github.com/NaturalIntelligence/fast-xml-parser", "reference_id": "", "reference_type": "", "scores": [ { "value": "2.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U" }, { "value": "LOW", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/NaturalIntelligence/fast-xml-parser" }, { "reference_url": "https://github.com/NaturalIntelligence/fast-xml-parser/commit/c13a961910f14986295dd28484eee830fa1a0e8a", "reference_id": "", "reference_type": "", "scores": [ { "value": "2.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U" }, { "value": "LOW", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/NaturalIntelligence/fast-xml-parser/commit/c13a961910f14986295dd28484eee830fa1a0e8a" }, { "reference_url": "https://github.com/NaturalIntelligence/fast-xml-parser/pull/791", "reference_id": "", "reference_type": "", "scores": [ { "value": "2.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U" }, { "value": "LOW", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/NaturalIntelligence/fast-xml-parser/pull/791" }, { "reference_url": "https://bugzilla.redhat.com/show_bug.cgi?id=2442938", "reference_id": "2442938", "reference_type": "", "scores": [], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2442938" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27942", "reference_id": "CVE-2026-27942", "reference_type": "", "scores": [ { "value": "2.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U" }, { "value": "LOW", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27942" }, { "reference_url": "https://github.com/advisories/GHSA-fj3w-jwp8-x2g3", "reference_id": "GHSA-fj3w-jwp8-x2g3", "reference_type": "", "scores": [ { "value": "LOW", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-fj3w-jwp8-x2g3" }, { "reference_url": "https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-fj3w-jwp8-x2g3", "reference_id": "GHSA-fj3w-jwp8-x2g3", "reference_type": "", "scores": [ { "value": "LOW", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" }, { "value": "2.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U" }, { "value": "LOW", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-fj3w-jwp8-x2g3" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2026:12277", "reference_id": "RHSA-2026:12277", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2026:12277" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2026:6174", "reference_id": "RHSA-2026:6174", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2026:6174" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2026:6802", "reference_id": "RHSA-2026:6802", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2026:6802" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2026:7110", "reference_id": "RHSA-2026:7110", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2026:7110" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2026:7128", "reference_id": "RHSA-2026:7128", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2026:7128" } ], "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": 937, "name": "OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities", "description": "Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2013." }, { "cwe_id": 1035, "name": "OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities", "description": "Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2017." }, { "cwe_id": 776, "name": "Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')", "description": "The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities." } ], "exploits": [], "severity_range_score": "0.1 - 7.5", "exploitability": "0.5", "weighted_severity": "6.8", "risk_score": 3.4, "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-15hj-tpge-5qed" }