libgit2: Submodule path traversal

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-53584
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-20 19:16:54 UTC
Updated2026-08-20 20:17:34 UTC
Descriptionlibgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Prior to 1.8.6 and 1.9.5, libgit2 does not reject traversal components in a submodule path loaded from .gitmodules. The affected src/libgit2/submodule.c paths include git_submodule_lookup and git_submodule_add_setup. A crafted repository can specify a path such as ../escape-target, and applications that initialize the submodule can create directories outside the repository working tree. This issue is fixed in versions 1.8.6 and 1.9.5.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Problem Types: CWE-22 | CWE-22 CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Libgit2 Libgit2 affected < 1.8.6 Not specified
CNA Libgit2 Libgit2 affected >= 1.9.0, < 1.9.5 Not specified

References

ReferenceSourceLinkTags
github.com/libgit2/libgit2/releases/tag/v1.8.6 [email protected] github.com
github.com/libgit2/libgit2/commit/ec7371da9f359cd8293e9108e7a0b1c1b61b67c4 [email protected] github.com
github.com/libgit2/libgit2/security/advisories/GHSA-cw77-j82w-mchm [email protected] github.com
github.com/libgit2/libgit2/commit/419637d3587396f5d139d6d88480eab3cd81e7a1 [email protected] github.com
github.com/libgit2/libgit2/commit/467c2d95ed663df722f83a5960edf568514b128c [email protected] github.com
github.com/libgit2/libgit2/releases/tag/v1.9.5 [email protected] github.com
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