Description
libgit2 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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| libgit2 | libgit2 | < 1.8.6, >= 1.9.0, < 1.9.5 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libgit2 | 1.9.6+ds-1 | — |
| Debian 13 | libgit2 | 1.9.0+ds-2+deb13u1 | — |
| Debian 12 | libgit2 | 1.5.1+ds-1+deb12u2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | libgit2 | 1.9.1+ds-1ubuntu1.1 | — |
| Ubuntu 24.04 LTS | libgit2 | 1.7.2+ds-1ubuntu3.1 | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | libgit2 | 1.1.0+dfsg.1-4.1ubuntu0.1+esm1 | — |
| Ubuntu Pro 20.04 LTS | libgit2 | 0.28.4+dfsg.1-2ubuntu0.1+esm1 | — |
| Ubuntu Pro 18.04 LTS | libgit2 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | libgit2 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | libgit2 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | libgit2 +1 | 1.9.7-1.hum1 | RHSA-2026:59361 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libgit2 | 1.9.6-1.1 | openSUSE-SU-2026:11315-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libgit2 | 1.9.6-r0 | — |
| Alpine v3.23 | libgit2 | 1.9.6-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | cargo-c | 0.10.21-1.amzn2023.0.1 | ALAS2023-2026-2064 |
| Amazon Linux 2023 | libgit2 +1 | 1.6.4-116.amzn2023 | ALAS2023-2026-2083 |
| Amazon Linux 2023 | mount-s3 | 1.24.0-1.amzn2023 | ALAS2023-2026-2137 |
| Amazon Linux 2023 | rust +14 | 1.97.0-2.amzn2023 | ALAS2023-2026-2065 |
| Amazon Linux 2 | rust +11 | 1.97.0-2.amzn2 | ALAS2-2026-3865 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libgit2 | 1.7.2-3 | — |
Advisories 7
- RHSA-2026:59361 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 6, 2026
- ALAS2023-2026-2137 Low: mount-s3 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Sep 14, 2026
- ALAS2023-2026-2083 Important: libgit2 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Aug 31, 2026
- ALAS2-2026-3865 Important: rust security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 17, 2026
- ALAS2023-2026-2064 Important: rust-cargo-c security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Aug 17, 2026
- ALAS2023-2026-2065 Important: rust security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Aug 17, 2026
- openSUSE-SU-2026:11315-1 libgit2-1_9-1.9.6-1.1 on GA media SUSE / openSUSE Security Updates · Jul 21, 2026
References
- https://github.com/libgit2/libgit2/security/advisories/GHSA-cw77-j82w-mchm
- https://github.com/libgit2/libgit2/commit/419637d3587396f5d139d6d88480eab3cd81e7a1
- https://github.com/libgit2/libgit2/commit/467c2d95ed663df722f83a5960edf568514b128c
- https://github.com/libgit2/libgit2/commit/ec7371da9f359cd8293e9108e7a0b1c1b61b67c4
- https://github.com/libgit2/libgit2/releases/tag/v1.8.6
- https://github.com/libgit2/libgit2/releases/tag/v1.9.5