CVE-2026-82286 gpt-crawler Arbitrary File Write via outputFileName Parameter
Unauthenticated attackers can write arbitrary files to any filesystem path via the outputFileName parameter, potentially leading to code execution or data modification.
- 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-2026-82286?
CVE-2026-82286 is a high-severity path traversal vulnerability in BuilderIO gpt-crawler, published on 28 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
gpt-crawler through 1.5.1 fails to validate the outputFileName parameter in the POST /crawl endpoint, allowing unauthenticated attackers to write arbitrary files to any filesystem path. Attackers can supply absolute paths or parent-directory segments to overwrite existing files with content sourced from attacker-controlled URLs.
Weakness: CWE-22
Which versions are affected by CVE-2026-82286?
How do I fix CVE-2026-82286?
No fix has been published for CVE-2026-82286 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-2026-82286 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-82286 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-98j5-x6wm-v8hp.