Vulnerability · Published May 28, 2026 · Assigned by GitHub_M
CVE-2026-44973Billy: Path traversal vulnerabilities
High 8.1
In plain English
A high-severity path traversal in go-billy from go-git. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Billy is an interface filesystem abstraction for Go. Prior to 5.9.0, multiple path traversal issues exist across different components of go-billy. Insufficient path sanitization and boundary enforcement may allow crafted paths (e.g., using ..) to escape intended base directories. While go-billy was not originally designed to provide a strong security boundary, some of these issues were inconsistent across some of the built-in implementations. This results in scenarios where applications relying on go-billy for some level of isolation may inadvertently expose access to unintended filesystem locations. This vulnerability is fixed in 5.9.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | golang-github-go-git-go-billy | no fix listed | DEBIAN-CVE-2026-44973 |
| Debian:13 | golang-github-go-git-go-billy | no fix listed | DEBIAN-CVE-2026-44973 |
| Debian:14 | golang-github-go-git-go-billy | 5.9.0-1 | DEBIAN-CVE-2026-44973 |
| Debian:14 | golang-github-go-git-go-billy-v6 | 6.0.0~alpha.1-1 | DEBIAN-CVE-2026-44973 |
| Go | github.com/go-git/go-billy/v5 | 5.9.0 | GHSA-qw64-3x98-g7q2 |
| Go | github.com/go-git/go-billy/v5 | 5.9.0 | GO-2026-5597 |
| Go | github.com/go-git/go-billy/v6 | 6.0.0-alpha.1 | GHSA-qw64-3x98-g7q2 |
| Ubuntu:22.04:LTS | golang-github-go-git-go-billy | no fix listed | UBUNTU-CVE-2026-44973 |
| Ubuntu:24.04:LTS | golang-github-go-git-go-billy | no fix listed | UBUNTU-CVE-2026-44973 |
| Ubuntu:25.10 | golang-github-go-git-go-billy | no fix listed | UBUNTU-CVE-2026-44973 |
| Ubuntu:26.04:LTS | golang-github-go-git-go-billy | no fix listed | UBUNTU-CVE-2026-44973 |
| Ubuntu:26.10 | golang-github-go-git-go-billy | no fix listed | UBUNTU-CVE-2026-44973 |
Affected products (as reported)
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
References
- https://github.com/go-git/go-billy/security/advisories/GHSA-qw64-3x98-g7q2 x_refsource_CONFIRM