CVE-2026-63475
MEDIUM
MEDIUM
Priority: 0.02
BB Relevance:
59/100
Published: 2026-11-03
Modified: 2026-11-03
First seen: 2026-11-03
Status: active
Attack Surface
Network
Low Complexity
No Auth
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
Required
S:
Unchanged
C:
None
I:
None
A:
Low
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.
Weakness Classification (2)
Affected Software (2)
| Vendor | Product | Version |
|---|---|---|
| isomorphic-git | isomorphic-git | < 1.38.6 |
| isomorphic-git | isomorphic-git | < 1.38.6 |
References & Advisories (4)
x_refsource_MISC
x_refsource_MISC
x_refsource_MISC
x_refsource_CONFIRM