Vulnerability · Published Jan 27, 2026 · Assigned by GitHub_M
CVE-2026-24686go-tuf Path Traversal in TAP 4 Multirepo Client Allows Arbitrary File Write via Malicious Repository Names
Medium 4.7
In plain English
A medium-severity path traversal in go-tuf from theupdateframework. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
go-tuf is a Go implementation of The Update Framework (TUF). go-tuf's TAP 4 Multirepo Client uses the map file repository name string (`repoName`) as a filesystem path component when selecting the local metadata cache directory. Starting in version 2.0.0 and prior to version 2.4.1, if an application accepts a map file from an untrusted source, an attacker can supply a `repoName` containing traversal (e.g., `../escaped-repo`) and cause go-tuf to create directories and write the root metadata file outside the intended `LocalMetadataDir` cache base, within the running process's filesystem permissions. Version 2.4.1 contains a patch.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | golang-github-theupdateframework-go-tuf | no fix listed | DEBIAN-CVE-2026-24686 |
| Debian:14 | golang-github-theupdateframework-go-tuf | 2.4.1+0.7.0-1 | DEBIAN-CVE-2026-24686 |
| Go | github.com/theupdateframework/go-tuf/v2 | 2.4.1 | GHSA-jqc5-w2xx-5vq4 |
| Go | github.com/theupdateframework/go-tuf/v2 | 2.4.1 | GO-2026-4377 |
| Ubuntu:24.04:LTS | golang-github-theupdateframework-go-tuf | no fix listed | UBUNTU-CVE-2026-24686 |
| Ubuntu:25.10 | golang-github-theupdateframework-go-tuf | no fix listed | UBUNTU-CVE-2026-24686 |
| Ubuntu:26.04:LTS | golang-github-theupdateframework-go-tuf | no fix listed | UBUNTU-CVE-2026-24686 |
| Ubuntu:26.10 | golang-github-theupdateframework-go-tuf | no fix listed | UBUNTU-CVE-2026-24686 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| theupdateframework | go-tuf | >= 2.0.0, < 2.4.1 |
Weakness: CWE-22 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N