CVE-2026-54501: CWE-20: Improper Input Validation in webrecorder browsertrix
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.
AI Analysis
Technical Summary
CVE-2026-54501 is an improper input validation vulnerability (CWE-20) in Browsertrix, a browser-based crawling service for web archiving. Between versions 1.15.0 and 1.22.7 inclusive, the application fails to properly sanitize Git URLs used as Custom Behaviors, enabling command injection through a specific API endpoint. Users with crawler or administrator roles can supply crafted Git URLs that execute arbitrary operating system commands on the backend pod. This can compromise application database records, archived items, browser profiles, storage data, proxy credentials, and other service data. The vulnerability is resolved in version 1.22.8.
Potential Impact
Successful exploitation allows attackers with limited privileges (crawler or administrator) to execute arbitrary commands on the backend system hosting Browsertrix. This can lead to unauthorized access, modification, or deletion of critical application data including database records, archived content, browser profiles, storage, and credentials. The vulnerability poses a critical risk to confidentiality, integrity, and availability of the service.
Mitigation Recommendations
Upgrade Browsertrix to version 1.22.8 or later, where this vulnerability is fixed. There is no indication that any temporary or alternative mitigations are available. Restrict crawler and administrator permissions to trusted users to reduce exposure until the upgrade is applied.
CVE-2026-54501: CWE-20: Improper Input Validation in webrecorder browsertrix
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.
CVSS v4.0
Score 9.4critical
Affected software
webrecorder
browsertrix
pkg:github/webrecorder/browsertrixRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-54501 is an improper input validation vulnerability (CWE-20) in Browsertrix, a browser-based crawling service for web archiving. Between versions 1.15.0 and 1.22.7 inclusive, the application fails to properly sanitize Git URLs used as Custom Behaviors, enabling command injection through a specific API endpoint. Users with crawler or administrator roles can supply crafted Git URLs that execute arbitrary operating system commands on the backend pod. This can compromise application database records, archived items, browser profiles, storage data, proxy credentials, and other service data. The vulnerability is resolved in version 1.22.8.
Potential Impact
Successful exploitation allows attackers with limited privileges (crawler or administrator) to execute arbitrary commands on the backend system hosting Browsertrix. This can lead to unauthorized access, modification, or deletion of critical application data including database records, archived content, browser profiles, storage, and credentials. The vulnerability poses a critical risk to confidentiality, integrity, and availability of the service.
Mitigation Recommendations
Upgrade Browsertrix to version 1.22.8 or later, where this vulnerability is fixed. There is no indication that any temporary or alternative mitigations are available. Restrict crawler and administrator permissions to trusted users to reduce exposure until the upgrade is applied.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-15T18:01:15.511Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aac51e955bf5e2cf5e0db7b
Added to database: 09/17/2026, 20:47:37 UTC
Last enriched: 09/17/2026, 21:01:57 UTC
Last updated: 09/18/2026, 01:33:55 UTC
Views: 5
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