{"cve":"CVE-2026-102277","nvd":{"published":"2026-09-28T21:17:16.300","modified":"2026-09-30T19:57:08.043","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3},"cwes":["CWE-400","CWE-407"],"references":["https://github.com/juliangruber/brace-expansion/commit/33a5ef17b8d800bbfa8c52b14c39043b6aac1a96","https://github.com/juliangruber/brace-expansion/commit/bdff773f98e5988616b7039cc9b508df5d640b22","https://github.com/juliangruber/brace-expansion/commit/c55e67d8d8b1c56a2474afff15c2891166b2d364","https://github.com/juliangruber/brace-expansion/commit/ffdfa3e3806bed17c0874b8f1439b084de354a7e","https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-q2hr-2g5m-vwhr"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:56:48.555445741+00:00"},"epss":{"cve":"CVE-2026-102277","score":0.0042,"percentile":0.35985,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-q2hr-2g5m-vwhr","url":"https://osv.dev/vulnerability/GHSA-q2hr-2g5m-vwhr","summary":"brace-expansion: Quadratic-time expansion of the `{a},b}` rewrite causes CPU denial of service","modified":"2026-09-30T00:00:03.849541183Z","packages":[{"ecosystem":"npm","name":"brace-expansion","purl":"pkg:npm/brace-expansion","ranges":[">=4.0.0 <5.0.12"],"fixed":["5.0.12"]},{"ecosystem":"npm","name":"brace-expansion","purl":"pkg:npm/brace-expansion","ranges":[">=3.0.0 <3.0.9"],"fixed":["3.0.9"]},{"ecosystem":"npm","name":"brace-expansion","purl":"pkg:npm/brace-expansion","ranges":[">=2.0.0 <2.1.7"],"fixed":["2.1.7"]},{"ecosystem":"npm","name":"brace-expansion","purl":"pkg:npm/brace-expansion","ranges":["<1.1.21"],"fixed":["1.1.21"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}