# CVE-2026-85731: golang-oras-oras-go: oras-go is a Go library for managing OCI artifacts

CVE-2026-85731 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-85731, released September 19, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-85731
- Priority: High
- CVSS: 8.8 (high)
- EPSS: 0.0068
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 16, 2026

## Description

oras-go is a Go library for managing OCI artifacts. Prior to 2.6.2, content/file.Store extraction of OCI layers marked with io.deis.oras.content.unpack=true can write outside the store working directory. The pushDir path through extractTarDirectory and ensureLinkPath validates symlink targets lexically, resolveRelToBase skips its parent-symlink walk for root-level entries, and writeFile follows a terminal symlink when opening a regular file. A malicious archive can therefore create a symlink chain whose lexical target remains inside the extraction root but whose resolved target is an attacker-selected absolute path, then overwrite that target with a same-named regular-file entry even when AllowPathTraversalOnWrite is false. Pulling an attacker-controlled artifact can create or overwrite any file writable by the process and may lead to code execution. This issue is fixed in version 2.6.2.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | golang-oras-oras-go Debian 14 | 2.6.2-1 | [DEBIAN-CVE-2026-85731](https://patchblox.com/security/data/fix/linux/debian-cve-2026-85731.md) | Sep 19, 2026 |
| Linux | helm sles 15.6 | 3.22.0-150000.1.99.1 | [SUSE-SU-2026:4417-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4417-1.md) | Oct 2, 2026 |
| Linux | helm sles 15.7 | 3.22.0-150000.1.99.1 | [SUSE-SU-2026:4417-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4417-1.md) | Oct 2, 2026 |

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Data as of 2026-11-09T19:38:12Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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