CVE-2026-54501

CRITICALPre-NVD 9.49.4—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 1.2%, top 33% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
9.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.4Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
9.4
EG Score
9.4(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity94% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
67%
KEV
Not listed

Published

September 17, 2026

Last Modified

September 17, 2026

Advisory Details (3)

Auto-updated Sep 17, 2026
Patch available. Sources: github_commit, github_release, github.
github_release Patch Available

Browsertrix v1.22.8

Patch available: webrecorder/browsertrix v1.22.8

https://github.com/webrecorder/browsertrix/releases/tag/v1.22.8
github_commit Patch Available

commit a306afc3893a (webrecorder/browsertrix)

Patch available: webrecorder/browsertrix v1.22.8 (contains commit a306afc3893a)

https://github.com/webrecorder/browsertrix/commit/a306afc3893a74ed0ec2407bdf0515ed52da8e46
github Patch Available

Arbitrary Command Injection due to Improper Command Sanitization in Git URLs specified as Custom Behaviors · Advisory · webrecorder/browsertrix · GitHub

https://github.com/webrecorder/browsertrix/security/advisories/GHSA-47vv-v544-r985

Weakness Classification(5)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 5× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-18 19:55 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-17 21:20 UTCEG score recompute
  4. 2026-09-17 20:25 UTCEG score recompute
  5. 2026-09-17 20:24 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-54501?
CVE-2026-54501 is a critical vulnerability published on September 17, 2026. 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…
When was CVE-2026-54501 disclosed?
CVE-2026-54501 was first published in the National Vulnerability Database on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54501 actively exploited?
CVE-2026-54501 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 32.7% of all scored CVEs.
What is the CVSS score of CVE-2026-54501?
CVE-2026-54501 has a CVSS v3 base score of 9.4 (NVD).
How do I remediate CVE-2026-54501?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54501, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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