CVE-2026-6635 rowboatlabs rowboat tools_webhook app.py tool_call improper authentication
Remote attackers can bypass authentication in the rowboat tools_webhook component by manipulating the X-Tools-JWE header.
- 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-2026-6635?
CVE-2026-6635 is a medium-severity authentication bypass vulnerability in rowboatlabs rowboat, published on 20 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A security vulnerability has been detected in rowboatlabs rowboat up to 0.1.67. This impacts the function tool_call of the file apps/experimental/tools_webhook/app.py of the component tools_webhook. Such manipulation of the argument X-Tools-JWE leads to improper authentication. The attack may be performed from remote. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Weakness: CWE-287
Which versions are affected by CVE-2026-6635?
How do I fix CVE-2026-6635?
No fix has been published for CVE-2026-6635 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-6635 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6635 exists.
Sources
Also known as GHSA-6c34-3mhj-jwxw.