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CRITICAL

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

Published Sep 17, 2026

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.

Affected products

Remediation

No remediation recorded yet.

Weaknesses (5)

CWE-20

Improper Input Validation

CWE-250

Execution with Unnecessary Privileges

CWE-77

CWE-78

OS Command Injection

CWE-88

References (3)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner GitHub_M
Published Sep 17, 2026
Updated Sep 17, 2026
Reserved Jun 15, 2026
Link CVE-2026-54501
CISA Vulnrichment
Updated Sep 17, 2026
NVD
Status Received
Modified Sep 17, 2026
Link CVE-2026-54501
Red Hat
Severity n/a
Public date n/a
Links CVE-2026-54501