CVE-2026-54091

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 63% 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
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: 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 2.63.6, File Browser's public share handlers rebase the share owner's filesystem root to the shared directory and then evaluate descendant paths against the owner's global and per-user rules using the rebased relative path instead of the original path relative to the owner's scope. As a result, an attacker who knows a public directory share URL can access files and subdirectories that the owner explicitly blocked with rules, as long as those blocked paths are located underneath the shared directory. In the simplest case this is an unauthenticated information disclosure through GET /api/public/share/* and GET /api/public/dl/*. This vulnerability is fixed in 2.63.6.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
37.4%
KEV
Not listed

Published

June 12, 2026

Last Modified

June 26, 2026

Advisory Details (3)

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

Incorrect access control in public directory shares via rule path rebasing · Advisory · filebrowser/filebrowser · GitHub

https://github.com/filebrowser/filebrowser/security/advisories/GHSA-j9jx-hp4c-ghhh
github_release Patch Available

v2.63.6

Patch available: filebrowser/filebrowser v2.63.6

https://github.com/filebrowser/filebrowser/releases/tag/v2.63.6
github_commit

commit e07c59df0b85 (filebrowser/filebrowser)

Fix landed in filebrowser/filebrowser commit e07c59df0b85 — awaiting tagged release

https://github.com/filebrowser/filebrowser/commit/e07c59df0b850f5924d5b1683e8609661ddcf534

Vendor Advisories for CVE-2026-54091(1)

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

Affected Packages

(2 across 1 ecosystem)
Go(2)
PackageVulnerable rangeFixed inDependents
github.com/filebrowser/filebrowser———
github.com/filebrowser/filebrowser/v2—2.63.6—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 69× 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 00:57 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 20:42 UTCEG score recompute
  7. 2026-07-05 09:36 UTCEG score recompute
  8. 2026-07-05 02:31 UTCEPSS rescore
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-04 21:41 UTCEG score recompute
  11. 2026-07-04 10:29 UTCEG score recompute
  12. 2026-07-04 06:31 UTCEPSS rescore
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-03 14:32 UTCEG score recompute
  15. 2026-07-03 00:43 UTCEG score recompute
  16. 2026-07-02 13:33 UTCEG score recompute
  17. 2026-07-02 02:12 UTCEG score recompute
  18. 2026-07-01 15:07 UTCEPSS rescore
  19. 2026-07-01 15:06 UTCEG score recompute
  20. 2026-07-01 03:57 UTCEG score recompute
  21. 2026-06-30 23:22 UTCEPSS rescore
  22. 2026-06-30 16:52 UTCEG score recompute
  23. 2026-06-30 05:46 UTCEG score recompute
  24. 2026-06-29 18:42 UTCEG score recompute
  25. 2026-06-29 14:06 UTCEPSS rescore
Show 44 more
  1. 2026-06-29 14:06 UTCEPSS rescore
  2. 2026-06-29 06:36 UTCEG score recompute
  3. 2026-06-28 19:29 UTCEG score recompute
  4. 2026-06-28 14:07 UTCEPSS rescore
  5. 2026-06-28 08:23 UTCEG score recompute
  6. 2026-06-28 04:56 UTCEPSS rescore
  7. 2026-06-28 04:56 UTCEPSS rescore
  8. 2026-06-27 21:19 UTCEG score recompute
  9. 2026-06-27 10:14 UTCEG score recompute
  10. 2026-06-27 03:08 UTCEPSS rescore
  11. 2026-06-26 23:09 UTCEG score recompute
  12. 2026-06-26 12:03 UTCEG score recompute
  13. 2026-06-25 23:07 UTCEG score recompute
  14. 2026-06-25 12:02 UTCEG score recompute
  15. 2026-06-25 00:57 UTCEG score recompute
  16. 2026-06-24 13:53 UTCEG score recompute
  17. 2026-06-24 02:45 UTCEG score recompute
  18. 2026-06-23 15:39 UTCEG score recompute
  19. 2026-06-23 04:35 UTCEG score recompute
  20. 2026-06-22 17:29 UTCEG score recompute
  21. 2026-06-22 05:45 UTCEG score recompute
  22. 2026-06-21 18:38 UTCEG score recompute
  23. 2026-06-21 07:26 UTCEG score recompute
  24. 2026-06-20 20:21 UTCEG score recompute
  25. 2026-06-20 07:43 UTCEG score recompute
  26. 2026-06-19 20:37 UTCEG score recompute
  27. 2026-06-19 09:32 UTCEG score recompute
  28. 2026-06-18 22:26 UTCEG score recompute
  29. 2026-06-18 11:21 UTCEG score recompute
  30. 2026-06-18 00:12 UTCEG score recompute
  31. 2026-06-17 13:04 UTCEG score recompute
  32. 2026-06-17 01:59 UTCEG score recompute
  33. 2026-06-16 14:53 UTCEG score recompute
  34. 2026-06-16 03:48 UTCEG score recompute
  35. 2026-06-15 16:44 UTCEG score recompute
  36. 2026-06-15 05:37 UTCEG score recompute
  37. 2026-06-14 23:18 UTCEPSS rescore
  38. 2026-06-14 18:32 UTCEG score recompute
  39. 2026-06-14 07:27 UTCEG score recompute
  40. 2026-06-13 23:00 UTCEPSS rescore
  41. 2026-06-13 20:22 UTCEG score recompute
  42. 2026-06-13 09:17 UTCEG score recompute
  43. 2026-06-12 23:12 UTCEPSS rescore
  44. 2026-06-12 22:11 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-54091?
CVE-2026-54091 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 2.63.6, File Browser's public share handlers rebase the share owner's filesystem root to the shared directory and then evaluate descendant paths against…
When was CVE-2026-54091 disclosed?
CVE-2026-54091 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-2026-54091 actively exploited?
CVE-2026-54091 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 37.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-54091?
CVE-2026-54091 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-54091?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54091, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-54091

Explore →

Is Your Infrastructure Affected by CVE-2026-54091?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs