CVE-2026-54501 Browsertrix: Arbitrary Command Injection due to Improper Command Sanitization in Git URLs specified as Custom Behaviors
Attackers with crawler permissions can inject commands via Git URLs in custom behaviors, leading to arbitrary code execution and data compromise.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-54501?
CVE-2026-54501 is a critical command injection vulnerability in webrecorder browsertrix, published on 17 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Browsertrix is a high-fidelity, browser-based crawling service for web archiving that can be self-hosted or used through Webrecorder's hosted instance. From 1.15.0 until 1.22.8, Browsertrix improperly sanitizes Git URLs specified as Custom Behaviors, allowing command injection through /api/orgs/*/crawlconfigs/validate/custom-behavior. A user with crawler or administrator permission on the specific instance can supply a crafted Git URL that executes arbitrary operating-system commands in the backend pod. Open registration or hosted free-trial access can make the required role broadly obtainable. Successful exploitation can expose, modify, or delete application database records, archived items, browser profiles, storage data, proxy credentials, and other configured service data. This issue is fixed in version 1.22.8.
Which versions are affected by CVE-2026-54501?
How do I fix CVE-2026-54501?
No fix has been published for CVE-2026-54501 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-54501 being exploited?
There is no known exploitation of CVE-2026-54501 in the wild and no public exploit code.
Sources
Also known as GHSA-47vv-v544-r985.