{"id":"CVE-2026-63475","published":"2026-11-03T20:18:15.903","lastModified":"2026-11-03T22:19:47.803","description":"isomorphic-git is a pure JavaScript implementation of Git for Node.js and browsers. Prior to 1.38.6, isomorphic-git persists server-supplied circular symref= capabilities through updateRemoteRefs, and GitRefManager.resolve() follows the resulting loose symbolic references without a default depth limit or cycle detection. After a clone from a malicious or man-in-the-middle-controlled remote, operations such as log, status, checkout, and branch that resolve refs/remotes/origin/a or refs/remotes/origin/b do not terminate. The circular references remain on disk, leaving the repository unusable for the application and causing a persistent denial of service. This issue is fixed in version 1.38.6.","cvssScore":4.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","cwes":["CWE-674","CWE-835"],"vendors":[],"products":[],"references":[{"url":"https://github.com/isomorphic-git/isomorphic-git/commit/823843d1cd19182df79bc907c767f5bcecb39a0b","tags":[]},{"url":"https://github.com/isomorphic-git/isomorphic-git/pull/2370","tags":[]},{"url":"https://github.com/isomorphic-git/isomorphic-git/releases/tag/v1.38.6","tags":[]},{"url":"https://github.com/isomorphic-git/isomorphic-git/security/advisories/GHSA-96wc-2m84-2cj7","tags":[]},{"url":"https://github.com/isomorphic-git/isomorphic-git/security/advisories/GHSA-96wc-2m84-2cj7","tags":[]}],"exploitRefs":[{"url":"https://github.com/isomorphic-git/isomorphic-git/commit/823843d1cd19182df79bc907c767f5bcecb39a0b","tags":[]},{"url":"https://github.com/isomorphic-git/isomorphic-git/pull/2370","tags":[]},{"url":"https://github.com/isomorphic-git/isomorphic-git/releases/tag/v1.38.6","tags":[]},{"url":"https://github.com/isomorphic-git/isomorphic-git/security/advisories/GHSA-96wc-2m84-2cj7","tags":[]},{"url":"https://github.com/isomorphic-git/isomorphic-git/security/advisories/GHSA-96wc-2m84-2cj7","tags":[]}],"hasPoc":true,"ai":null}