CVE-2026-51882 Path traversal in n/a
Attackers can write files to arbitrary locations outside the intended directory via malicious filenames in the file upload endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-51882?
CVE-2026-51882 is a critical path traversal vulnerability in n/a, published on 1 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The OpenAI-compatible file upload endpoint `/v1/files` in Langchain-Chatchat 0.3.0 is vulnerable to path traversal. An attacker can write files to arbitrary locations outside the `openai_files` directory by crafting malicious filenames.
Weakness: CWE-22
Which versions are affected by CVE-2026-51882?
How do I fix CVE-2026-51882?
No fix has been published for CVE-2026-51882 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-2026-51882 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-51882 exists.
Sources
Also known as GHSA-p52p-3gpf-v5f9.