{"id":"UBUNTU-CVE-2026-27903","details":"minimatch is a minimal matching utility for converting glob expressions into JavaScript RegExp objects. Prior to version 10.2.3, 9.0.7, 8.0.6, 7.4.8, 6.2.2, 5.1.8, 4.2.5, and 3.1.3, `matchOne()` performs unbounded recursive backtracking when a glob pattern contains multiple non-adjacent `**` (GLOBSTAR) segments and the input path does not match. The time complexity is O(C(n, k)) -- binomial -- where `n` is the number of path segments and `k` is the number of globstars. With k=11 and n=30, a call to the default `minimatch()` API stalls for roughly 5 seconds. With k=13, it exceeds 15 seconds. No memoization or call budget exists to bound this behavior. Any application where an attacker can influence the glob pattern passed to `minimatch()` is vulnerable. The realistic attack surface includes build tools and task runners that accept user-supplied glob arguments (ESLint, Webpack, Rollup config), multi-tenant systems where one tenant configures glob-based rules that run in a shared process, admin or developer interfaces that accept ignore-rule or filter configuration as globs, and CI/CD pipelines that evaluate user-submitted config files containing glob patterns. An attacker who can place a crafted pattern into any of these paths can stall the Node.js event loop for tens of seconds per invocation. The pattern is 56 bytes for a 5-second stall and does not require authentication in contexts where pattern input is part of the feature. Versions 10.2.3, 9.0.7, 8.0.6, 7.4.8, 6.2.2, 5.1.8, 4.2.5, and 3.1.3 fix the issue.","modified":"2026-03-05T12:29:35Z","published":"2026-02-26T02:16:00Z","upstream":["CVE-2026-27903"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-27903"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-27903"},{"type":"REPORT","url":"https://github.com/isaacs/minimatch/security/advisories/GHSA-7r86-cg39-jmmj"}],"affected":[{"package":{"name":"node-minimatch","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/node-minimatch@0.2.12-1ubuntu0.1~esm2?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.2.11-1","0.2.12-1","0.2.12-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"node-minimatch","binary_version":"0.2.12-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27903.json"}},{"package":{"name":"node-minimatch","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/node-minimatch@1.0.0-1ubuntu0.1~esm2?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0-1","1.0.0-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"node-minimatch","binary_version":"1.0.0-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27903.json"}},{"package":{"name":"node-minimatch","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/node-minimatch@3.0.4-3+deb10u1build0.18.04.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.4-1","3.0.4-3","3.0.4-3+deb10u1build0.18.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-minimatch","binary_version":"3.0.4-3+deb10u1build0.18.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27903.json"}},{"package":{"name":"node-minimatch","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/node-minimatch@3.0.4-4ubuntu0.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.4-3","3.0.4-4","3.0.4-4ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-minimatch","binary_version":"3.0.4-4ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27903.json"}},{"package":{"name":"node-minimatch","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/node-minimatch@3.1.1+~3.0.5-1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.4+~3.0.3-1","3.0.4+~3.0.5-1","3.1.1+~3.0.5-1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-minimatch","binary_version":"3.1.1+~3.0.5-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27903.json"}},{"package":{"name":"node-minimatch","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/node-minimatch@9.0.3-4build5?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.1.1+~5.1.2-1","9.0.3-4build5"],"ecosystem_specific":{"binaries":[{"binary_name":"node-minimatch","binary_version":"9.0.3-4build5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27903.json"}},{"package":{"name":"node-minimatch","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/node-minimatch@9.0.3-6?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.0.3-5","9.0.3-6"],"ecosystem_specific":{"binaries":[{"binary_name":"node-minimatch","binary_version":"9.0.3-6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27903.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}