Critical 9.4Published Sep 17, 2026

CVE-2026-54501Browsertrix: Arbitrary Command Injection due to Improper Command Sanitization in Git URLs specified as Custom Behaviors

Updated under an hour ago (2026-10-19 09:30 UTC)

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It affects webrecorder browsertrix. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for webrecorder browsertrix

Exploited in the last 30 days

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.

CVSS: 9.4 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Weakness (CWE): CWE-20, CWE-77, CWE-78, CWE-88, CWE-250
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

webrecorder browsertrix webrecorder:browsertrix (from the name)	from 1.15.0, < 1.22.8	CNA record

References

https://github.com/webrecorder/browsertrix/security/advisories/GHSA-47vv-v544-r985x-refsource-confirm
https://github.com/webrecorder/browsertrix/commit/a306afc3893a74ed0ec2407bdf0515ed52da8e46x-refsource-misc
https://github.com/webrecorder/browsertrix/releases/tag/v1.22.8x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.