{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63475","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-07-16T21:37:45.769Z","datePublished":"2026-11-03T19:45:24.488Z","dateUpdated":"2026-11-03T21:31:07.998Z"},"containers":{"cna":{"title":"isomorphic-git: Circular symbolic references cause non-terminating resolution (DoS)","problemTypes":[{"descriptions":[{"cweId":"CWE-674","lang":"en","description":"CWE-674: Uncontrolled Recursion","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-835","lang":"en","description":"CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","version":"3.1"}}],"references":[{"name":"https://github.com/isomorphic-git/isomorphic-git/security/advisories/GHSA-96wc-2m84-2cj7","tags":["x_refsource_CONFIRM"],"url":"https://github.com/isomorphic-git/isomorphic-git/security/advisories/GHSA-96wc-2m84-2cj7"},{"name":"https://github.com/isomorphic-git/isomorphic-git/pull/2370","tags":["x_refsource_MISC"],"url":"https://github.com/isomorphic-git/isomorphic-git/pull/2370"},{"name":"https://github.com/isomorphic-git/isomorphic-git/commit/823843d1cd19182df79bc907c767f5bcecb39a0b","tags":["x_refsource_MISC"],"url":"https://github.com/isomorphic-git/isomorphic-git/commit/823843d1cd19182df79bc907c767f5bcecb39a0b"},{"name":"https://github.com/isomorphic-git/isomorphic-git/releases/tag/v1.38.6","tags":["x_refsource_MISC"],"url":"https://github.com/isomorphic-git/isomorphic-git/releases/tag/v1.38.6"}],"affected":[{"vendor":"isomorphic-git","product":"isomorphic-git","versions":[{"version":"< 1.38.6","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-11-03T19:45:24.488Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-96wc-2m84-2cj7","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/isomorphic-git/isomorphic-git/security/advisories/GHSA-96wc-2m84-2cj7","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-11-03T21:30:35.793171Z","id":"CVE-2026-63475","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-11-03T21:31:07.998Z"}}]}}