{"id":"CVE-2026-102277","published":"2026-09-28T21:17:16.300","lastModified":"2026-09-29T20:17:12.420","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.","cvssScore":5.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cwes":["CWE-400","CWE-407"],"vendors":[],"products":[],"references":[{"url":"https://github.com/juliangruber/brace-expansion/commit/33a5ef17b8d800bbfa8c52b14c39043b6aac1a96","tags":[]},{"url":"https://github.com/juliangruber/brace-expansion/commit/bdff773f98e5988616b7039cc9b508df5d640b22","tags":[]},{"url":"https://github.com/juliangruber/brace-expansion/commit/c55e67d8d8b1c56a2474afff15c2891166b2d364","tags":[]},{"url":"https://github.com/juliangruber/brace-expansion/commit/ffdfa3e3806bed17c0874b8f1439b084de354a7e","tags":[]},{"url":"https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-q2hr-2g5m-vwhr","tags":[]}],"exploitRefs":[{"url":"https://github.com/juliangruber/brace-expansion/commit/33a5ef17b8d800bbfa8c52b14c39043b6aac1a96","tags":[]},{"url":"https://github.com/juliangruber/brace-expansion/commit/bdff773f98e5988616b7039cc9b508df5d640b22","tags":[]},{"url":"https://github.com/juliangruber/brace-expansion/commit/c55e67d8d8b1c56a2474afff15c2891166b2d364","tags":[]},{"url":"https://github.com/juliangruber/brace-expansion/commit/ffdfa3e3806bed17c0874b8f1439b084de354a7e","tags":[]},{"url":"https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-q2hr-2g5m-vwhr","tags":[]}],"hasPoc":true,"ai":null}