CVE-2026-54090

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 76% 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
8.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.7Exploit: NoneExposed: 0

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

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.33.8, when a shell interpreter is configured (e.g. /bin/sh -c), the command allowlist can be bypassed through shell metacharacters. The allowlist validates only the first token of user input, but the entire raw string is handed to the shell — semicolons, pipes, backticks, and $() all work to chain arbitrary commands after a permitted one. This vulnerability is fixed in 2.33.8.

CVSS v3
8.7
EG Score
8.7(medium)
EPSS
24.2%
KEV
Not listed

Published

June 12, 2026

Last Modified

June 26, 2026

Advisory Details (2)

Auto-updated Jun 25, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Command Execution Allowlist Bypass via Shell Metacharacter Injection · Advisory · filebrowser/filebrowser · GitHub

Affected: 2.33.10) and

https://github.com/filebrowser/filebrowser/security/advisories/GHSA-8c9q-7855-wfxq
generic

Fix: Command Execution/Runner/Hooks Features · Issue #5199 · filebrowser/filebrowser · GitHub

https://github.com/filebrowser/filebrowser/issues/5199

Vendor Advisories for CVE-2026-54090(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/filebrowser/filebrowser/v2—2.33.8—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 22× in last 7d / 44× 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. 2026-07-07 00:49 UTCEG score recompute
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-05 21:35 UTCEG score recompute
  7. 2026-07-05 09:35 UTCEG score recompute
  8. 2026-07-05 02:31 UTCEPSS rescore
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-04 21:39 UTCEG score recompute
  11. 2026-07-04 10:20 UTCEG score recompute
  12. 2026-07-04 06:31 UTCEPSS rescore
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-03 14:29 UTCEG score recompute
  15. 2026-07-03 01:47 UTCEG score recompute
  16. 2026-07-02 14:35 UTCEG score recompute
  17. 2026-07-02 03:25 UTCEG score recompute
  18. 2026-07-01 16:15 UTCEG score recompute
  19. 2026-07-01 15:07 UTCEPSS rescore
  20. 2026-07-01 05:05 UTCEG score recompute
  21. 2026-06-30 23:22 UTCEPSS rescore
  22. 2026-06-30 17:33 UTCEG score recompute
  23. 2026-06-30 05:52 UTCEG score recompute
  24. 2026-06-29 18:40 UTCEG score recompute
  25. 2026-06-29 14:06 UTCEPSS rescore
Show 19 more
  1. 2026-06-29 14:06 UTCEPSS rescore
  2. 2026-06-29 07:14 UTCEG score recompute
  3. 2026-06-28 19:57 UTCEG score recompute
  4. 2026-06-28 14:07 UTCEPSS rescore
  5. 2026-06-28 08:46 UTCEG score recompute
  6. 2026-06-28 04:56 UTCEPSS rescore
  7. 2026-06-28 04:56 UTCEPSS rescore
  8. 2026-06-27 21:36 UTCEG score recompute
  9. 2026-06-27 10:26 UTCEG score recompute
  10. 2026-06-27 03:08 UTCEPSS rescore
  11. 2026-06-26 23:15 UTCEG score recompute
  12. 2026-06-26 12:02 UTCEG score recompute
  13. 2026-06-25 19:50 UTCEG score recompute▲ 8.70
  14. 2026-06-25 19:49 UTCNVD updateCVSS v3 → 8.7 · CVSS v4 → 8.7
  15. 2026-06-16 00:24 UTCEG score recompute
  16. 2026-06-14 23:18 UTCEPSS rescore
  17. 2026-06-13 23:00 UTCEPSS rescore
  18. 2026-06-12 23:12 UTCEPSS rescore
  19. 2026-06-12 23:08 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-54090?
CVE-2026-54090 is a high vulnerability published on June 12, 2026. File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.33.8, when a shell interpreter is configured (e.g. /bin/sh -c), the command allowlist can be bypassed through shell metacharacters. The allowlist…
When was CVE-2026-54090 disclosed?
CVE-2026-54090 was first published in the National Vulnerability Database on June 12, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54090 actively exploited?
CVE-2026-54090 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-54090?
CVE-2026-54090 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-54090?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54090, 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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