CVE-2026-25890

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under NVD CVSS v3. 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, nvd
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: None knownExposed: 0

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

File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. Prior to 2.57.1, an authenticated user can bypass the application's "Disallow" file path rules by modifying the request URL. By adding multiple slashes (e.g., //private/) to the path, the authorization check fails to match the rule, while the underlying filesystem resolves the path correctly, granting unauthorized access to restricted files. This vulnerability is fixed in 2.57.1.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity81% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

February 9, 2026

Last Modified

February 20, 2026

Advisory Details (3)

Auto-updated Jun 10, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github, github_commit.
github Patch Available🟡 PoC Available

Path-Based Access Control Bypass via Multiple Leading Slashes in URL · Advisory · filebrowser/filebrowser · GitHub

https://github.com/filebrowser/filebrowser/security/advisories/GHSA-4mh3-h929-w968
github_release Patch Available

v2.57.1

Patch available: filebrowser/filebrowser v2.57.1

https://github.com/filebrowser/filebrowser/releases/tag/v2.57.1
github_commit

commit 489af403a190 (filebrowser/filebrowser)

Fix landed in filebrowser/filebrowser commit 489af403a190 — awaiting tagged release

https://github.com/filebrowser/filebrowser/commit/489af403a19057f6b6b4b1dc0e48cbb26a202ef9

Affected Packages

(2 across 1 ecosystem)
Go(2)
PackageVulnerable rangeFixed inDependents
github.com/filebrowser/filebrowser———
github.com/filebrowser/filebrowser/v2—2.57.1—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 53× 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.

Showing the most recent 100 of 105 total refreshes for this CVE.

  1. 2026-07-26 14:54 UTCEPSS rescore
  2. 2026-07-26 14:54 UTCEPSS rescore
  3. 2026-07-25 14:18 UTCEPSS rescore
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  8. 2026-07-23 03:07 UTCEG score recompute
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  11. 2026-07-21 15:24 UTCEPSS rescore
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  20. 2026-07-17 17:29 UTCOSV refresh
  21. 2026-07-16 17:03 UTCEPSS rescore
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  1. 2026-07-15 02:00 UTCEPSS rescore
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  9. 2026-07-08 15:15 UTCEPSS rescore
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  11. 2026-07-07 13:46 UTCEPSS rescore
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  21. 2026-06-30 23:22 UTCEPSS rescore
  22. 2026-06-30 23:22 UTCEPSS rescore
  23. 2026-06-29 15:23 UTCOSV refresh
  24. 2026-06-29 14:06 UTCEPSS rescore
  25. 2026-06-28 14:07 UTCEPSS rescore
  26. 2026-06-28 14:07 UTCEPSS rescore
  27. 2026-06-28 04:56 UTCEPSS rescore
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  29. 2026-06-27 03:08 UTCEPSS rescore
  30. 2026-06-25 13:49 UTCEPSS rescore
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  40. 2026-06-21 01:59 UTCEPSS rescore
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  42. 2026-06-19 19:25 UTCEPSS rescore
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  44. 2026-06-18 17:52 UTCEPSS rescore
  45. 2026-06-17 17:53 UTCEPSS rescore
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  47. 2026-06-16 17:52 UTCEPSS rescore
  48. 2026-06-15 17:48 UTCEPSS rescore
  49. 2026-06-14 23:18 UTCEPSS rescore
  50. 2026-06-13 23:00 UTCEPSS rescore
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  54. 2026-06-10 22:18 UTCEPSS rescore
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  56. 2026-06-10 13:22 UTCEPSS rescore
  57. 2026-06-08 14:17 UTCEPSS rescore
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  59. 2026-06-07 15:25 UTCEPSS rescore
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  62. 2026-06-06 13:47 UTCEPSS rescore
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  68. 2026-06-04 13:12 UTCEPSS rescore
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  70. 2026-06-02 20:13 UTCEPSS rescore
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  72. 2026-06-01 13:51 UTCEPSS rescore
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  74. 2026-05-31 22:30 UTCEPSS rescore
  75. 2026-05-31 22:30 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-25890?
CVE-2026-25890 is a high vulnerability published on February 9, 2026. File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. Prior to 2.57.1, an authenticated user can bypass the application's "Disallow" file path rules by modifying the request URL. By adding multiple slashes…
When was CVE-2026-25890 disclosed?
CVE-2026-25890 was first published in the National Vulnerability Database on February 9, 2026, with the most recent update on February 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-25890 actively exploited?
CVE-2026-25890 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 62.5% of all scored CVEs.
What is the CVSS score of CVE-2026-25890?
CVE-2026-25890 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-25890?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-25890, 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.

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