{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-102277", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-28T20:11:16.659Z", "datePublished": "2026-09-28T20:54:46.160Z", "dateUpdated": "2026-09-28T20:54:46.160Z"}, "containers": {"cna": {"title": "brace-expansion: Quadratic-time expansion of the `{a},b}` rewrite causes CPU denial of service", "problemTypes": [{"descriptions": [{"cweId": "CWE-400", "lang": "en", "description": "CWE-400: Uncontrolled Resource Consumption", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-407", "lang": "en", "description": "CWE-407: Inefficient Algorithmic Complexity", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-q2hr-2g5m-vwhr", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-q2hr-2g5m-vwhr"}, {"name": "https://github.com/juliangruber/brace-expansion/commit/33a5ef17b8d800bbfa8c52b14c39043b6aac1a96", "tags": ["x_refsource_MISC"], "url": "https://github.com/juliangruber/brace-expansion/commit/33a5ef17b8d800bbfa8c52b14c39043b6aac1a96"}, {"name": "https://github.com/juliangruber/brace-expansion/commit/bdff773f98e5988616b7039cc9b508df5d640b22", "tags": ["x_refsource_MISC"], "url": "https://github.com/juliangruber/brace-expansion/commit/bdff773f98e5988616b7039cc9b508df5d640b22"}, {"name": "https://github.com/juliangruber/brace-expansion/commit/c55e67d8d8b1c56a2474afff15c2891166b2d364", "tags": ["x_refsource_MISC"], "url": "https://github.com/juliangruber/brace-expansion/commit/c55e67d8d8b1c56a2474afff15c2891166b2d364"}, {"name": "https://github.com/juliangruber/brace-expansion/commit/ffdfa3e3806bed17c0874b8f1439b084de354a7e", "tags": ["x_refsource_MISC"], "url": "https://github.com/juliangruber/brace-expansion/commit/ffdfa3e3806bed17c0874b8f1439b084de354a7e"}], "affected": [{"vendor": "juliangruber", "product": "brace-expansion", "versions": [{"version": ">= 4.0.0, < 5.0.12", "status": "affected"}, {"version": ">= 3.0.0, < 3.0.9", "status": "affected"}, {"version": ">= 2.0.0, < 2.1.7", "status": "affected"}, {"version": "< 1.1.21", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-28T20:54:46.160Z"}, "descriptions": [{"lang": "en", "value": "The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to 1.1.21, 2.1.7, 3.0.9, and 5.0.12, the expand function handles untrusted {a},b}-shaped patterns with many trailing closing braces by restarting its scan once for each trailing closing brace. The successive full-input rescans with linear working-string growth cause quadratic CPU time and memory pressure that can block the Node.js event loop. The process eventually recovers, making the impact a recoverable CPU denial of service. This issue is fixed in versions 1.1.21, 2.1.7, 3.0.9, and 5.0.12."}], "source": {"advisory": "GHSA-q2hr-2g5m-vwhr", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "brace-expansion", "vendor": "juliangruber", "versions": [{"status": "affected", "version": ">= 4.0.0, < 5.0.12"}, {"status": "affected", "version": ">= 3.0.0, < 3.0.9"}, {"status": "affected", "version": ">= 2.0.0, < 2.1.7"}, {"status": "affected", "version": "< 1.1.21"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to 1.1.21, 2.1.7, 3.0.9, and 5.0.12, the expand function handles untrusted {a},b}-shaped patterns with many trailing closing braces by restarting its scan once for each trailing closing brace. The successive full-input rescans with linear working-string growth cause quadratic CPU time and memory pressure that can block the Node.js event loop. The process eventually recovers, making the impact a recoverable CPU denial of service. This issue is fixed in versions 1.1.21, 2.1.7, 3.0.9, and 5.0.12."}], "id": "CVE-2026-102277", "lastModified": "2026-09-28T21:17:16.300", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-28T21:17:16.300", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/juliangruber/brace-expansion/commit/33a5ef17b8d800bbfa8c52b14c39043b6aac1a96"}, {"source": "security-advisories@github.com", "url": "https://github.com/juliangruber/brace-expansion/commit/bdff773f98e5988616b7039cc9b508df5d640b22"}, {"source": "security-advisories@github.com", "url": "https://github.com/juliangruber/brace-expansion/commit/c55e67d8d8b1c56a2474afff15c2891166b2d364"}, {"source": "security-advisories@github.com", "url": "https://github.com/juliangruber/brace-expansion/commit/ffdfa3e3806bed17c0874b8f1439b084de354a7e"}, {"source": "security-advisories@github.com", "url": "https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-q2hr-2g5m-vwhr"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-407"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0,5.0.12)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.0.0,3.0.9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.0.0,2.1.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.1.21)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "brace-expansion", "source": "cna", "vendor": "juliangruber"}, "product": "brace-expansion", "vendor": "juliangruber"}], "created": "2026-09-28T22:30:08.184013+00:00", "updated": "2026-09-28T23:00:07.181881+00:00", "vendors": ["juliangruber", "juliangruber$PRODUCT$brace-expansion"]}