CVE-2026-92812 Decap CMS < 3.11.0 Path Traversal via Sibling Directory Prefix Matching
Attackers can bypass containment guards to read, write, or delete files in sibling directories outside the intended repository root.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-92812?
CVE-2026-92812 is a critical path traversal vulnerability in decaporg decap-cms, published on 16 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Decap CMS before 3.11.0 contains a path traversal vulnerability in the local proxy containment guard that uses plain string prefix comparison without path separator validation. Attackers can access sibling directories whose names begin with the repository directory name to read, write, or delete files outside the intended repository root.
Weakness: CWE-22
Which versions are affected by CVE-2026-92812?
How do I fix CVE-2026-92812?
No fix has been published for CVE-2026-92812 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-92812 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-92812 exists.
Sources
Also known as GHSA-5rrq-v82w-qpfr, GHSA-fjm6-6gxh-mvf2.