GHSA-w5pp-99ch-qj29
go-git: Malformed Git object data may cause panics or resource exhaustion
Impact
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.
Patches
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.
Credits
go-git thanks @kodareef5, @AyushParkara and @N0zoM1z0 for reporting this in four separate reports. 🙇
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
What each source reports
GitHub Advisories Score used
go-git: Malformed Git object data may cause panics or resource exhaustion
Impact
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.
Patches
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.
Credits
go-git thanks @kodareef5, @AyushParkara and @N0zoM1z0 for reporting this in four separate reports. 🙇
- Record
GHSA-w5pp-99ch-qj29- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
OSV
go-git: Malformed Git object data may cause panics or resource exhaustion
Impact
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.
Patches
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.
Credits
go-git thanks @kodareef5, @AyushParkara and @N0zoM1z0 for reporting this in four separate reports. 🙇
- Record
GHSA-w5pp-99ch-qj29- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
OSVGO-2026-5693No score
Go-git: Malformed Git object data may cause panics or resource exhaustion in github.com/go-git/go-git
Go-git: Malformed Git object data may cause panics or resource exhaustion in github.com/go-git/go-git
- Record
GO-2026-5693- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/go-git/go-git/v5Go | through 5.19.0 | 5.19.1 |
github.com/go-git/go-git/v6Go | through 6.0.0-alpha.3 | 6.0.0-alpha.4 |
github.com/go-git/go-git/v5Go | before 5.19.1 | 5.19.1 |
github.com/go-git/go-git/v6Go | before 6.0.0-alpha.4 | 6.0.0-alpha.4 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
GHSA-w5pp-99ch-qj29 is a medium vulnerability (CVSS 6.5) in github.com/go-git/go-git/v5, published May 29, 2026. No source lists public exploit code. Fixed in github.com/go-git/go-git/v5 5.19.1.