GHSA-W5PP-99CH-QJ29

Credits

go-git thanks @kodareef5, @AyushParkara and @N0zoM1z0 for reporting this in four separate reports. 🙇

Several denial-of-service issues were identified in go-git when parsing maliciously crafted Git repository data.

An attacker may craft a malicious .pack, .idx or loose objects that causes an application using an affected version of go-git to panic or consume excessive resources.

This can lead to denial of service in applications that use go-git to clone, fetch, open, or otherwise process untrusted repositories or Git object data.

Exploitation requires the ability to alter read-only files such as .pack or .idx from the local repository's .git/objects/pack/ directory. Alternatively, the user would need to be interacting with a malicious remote server, which is not recommended and exposes users to a broader class of security risks beyond this issue.

Crafted input forces the application to consume excessive CPU, memory, or other resources, degrading or denying service. Typical impact: denial of service.

GHSA-W5PP-99CH-QJ29 has a CVSS score of 6.5 (Medium). The vector is network-reachable, no privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (5.19.1, 6.0.0-alpha.4); upgrading removes the vulnerable code path.

Kodem intelligence

Users should upgrade to a patched version in order to mitigate this vulnerability. Versions prior to v5 are likely to be affected, users are recommended to upgrade to a supported go-git version.

1. What is GHSA-W5PP-99CH-QJ29? GHSA-W5PP-99CH-QJ29 is a medium-severity uncontrolled resource consumption vulnerability in github.com/go-git/go-git/v5 (go), affecting versions <= 5.19.0. It is fixed in 5.19.1, 6.0.0-alpha.4. Crafted input forces the application to consume excessive CPU, memory, or other resources, degrading or denying service.
2. How severe is GHSA-W5PP-99CH-QJ29? GHSA-W5PP-99CH-QJ29 has a CVSS score of 6.5 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which packages are affected by GHSA-W5PP-99CH-QJ29?
   • github.com/go-git/go-git/v5 (go) (versions <= 5.19.0)
   • github.com/go-git/go-git/v6 (go) (versions <= 6.0.0-alpha.3)
4. Is there a fix for GHSA-W5PP-99CH-QJ29? Yes. GHSA-W5PP-99CH-QJ29 is fixed in 5.19.1, 6.0.0-alpha.4. Upgrade to this version or later.
5. Is GHSA-W5PP-99CH-QJ29 exploitable, and should I be worried? Whether GHSA-W5PP-99CH-QJ29 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether GHSA-W5PP-99CH-QJ29 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix GHSA-W5PP-99CH-QJ29?
   • Upgrade github.com/go-git/go-git/v5 to 5.19.1 or later
   • Upgrade github.com/go-git/go-git/v6 to 6.0.0-alpha.4 or later