CVE-2026-73611

MEDIUMPre-NVD 6.86.8—
EchelonGraph scoreMEDIUM confidence

Score 6.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-13. A secondary CVSS source baseline 6.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

File Browser versions from 2.50.0 through 2.63.21 fail to validate JWT expiration when proxy authentication is configured with a non-default logout page. Attackers with a previously valid token can access protected routes and administrative endpoints indefinitely, and exchange expired tokens for fresh ones via the renewal endpoint.

CVSS v3
6.8
EG Score
6.8MEDIUMmedium confidence
EG Risk
47
EG Risk 47/100CISA SSVC

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
Severity68% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
35th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 13, 2026

Last Modified

September 30, 2026

Advisory Details (3)

Auto-updated Aug 13, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
generic

File Browser 2.50.0 through 2.63.21 JWT Expiration Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/file-browser-through-jwt-expiration-bypass
github_commit

commit 72faf6dd3c85 (filebrowser/filebrowser)

Fix landed in filebrowser/filebrowser commit 72faf6dd3c85 — awaiting tagged release

https://github.com/filebrowser/filebrowser/commit/72faf6dd3c85628e332d3e567124b86708ce2695
github Patch Available🟡 PoC Available

Expired JWTs accepted under proxy auth with a custom logout page · Advisory · filebrowser/filebrowser · GitHub

Affected: v2.63.22. The expiration is now waived only when the configured proxy header stil

https://github.com/filebrowser/filebrowser/security/advisories/GHSA-v3jv-rmh2-635j

Vendor Advisories for CVE-2026-73611(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 74× 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 146 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 22:25 UTCGHSA enrichment
  3. 2026-10-03 19:53 UTCEG score recompute
  4. 2026-10-03 19:53 UTCGHSA enrichment
  5. 2026-10-03 14:26 UTCEPSS rescore
  6. 2026-10-02 08:05 UTCEG score recompute
  7. 2026-10-02 08:05 UTCGHSA enrichment
  8. 2026-10-01 19:50 UTCEPSS rescore
  9. 2026-09-30 18:43 UTCEG score recompute
  10. 2026-09-30 18:43 UTCGHSA enrichment
  11. 2026-09-30 17:39 UTCEG score recompute
  12. 2026-09-30 17:39 UTCGHSA enrichment
  13. 2026-09-29 15:24 UTCEPSS rescore
  14. 2026-09-29 06:00 UTCEG score recompute
  15. 2026-09-29 05:59 UTCGHSA enrichment
  16. 2026-09-28 13:52 UTCEPSS rescore
  17. 2026-09-28 07:55 UTCEG score recompute
  18. 2026-09-28 07:55 UTCGHSA enrichment
  19. 2026-09-27 13:48 UTCEPSS rescore
  20. 2026-09-27 09:48 UTCEG score recompute
  21. 2026-09-27 09:48 UTCGHSA enrichment
  22. 2026-09-26 15:59 UTCEPSS rescore
  23. 2026-09-25 03:37 UTCEG score recompute
  24. 2026-09-25 03:37 UTCGHSA enrichment
  25. 2026-09-23 20:52 UTCEG score recompute
Show 75 more
  1. 2026-09-23 20:52 UTCGHSA enrichment
  2. 2026-09-23 17:54 UTCEPSS rescore
  3. 2026-09-22 21:03 UTCEG score recompute
  4. 2026-09-22 21:03 UTCGHSA enrichment
  5. 2026-09-21 21:09 UTCEPSS rescore
  6. 2026-09-21 19:59 UTCGHSA enrichment
  7. 2026-09-20 21:17 UTCEG score recompute
  8. 2026-09-20 21:17 UTCGHSA enrichment
  9. 2026-09-20 20:16 UTCEPSS rescore
  10. 2026-09-19 23:11 UTCEG score recompute
  11. 2026-09-19 23:11 UTCGHSA enrichment
  12. 2026-09-18 23:59 UTCEG score recompute
  13. 2026-09-18 23:59 UTCGHSA enrichment
  14. 2026-09-18 19:28 UTCEPSS rescore
  15. 2026-09-18 01:54 UTCEG score recompute
  16. 2026-09-18 01:54 UTCGHSA enrichment
  17. 2026-09-17 03:49 UTCEG score recompute
  18. 2026-09-17 03:49 UTCGHSA enrichment
  19. 2026-09-16 14:08 UTCEPSS rescore
  20. 2026-09-16 05:43 UTCEG score recompute
  21. 2026-09-16 05:43 UTCGHSA enrichment
  22. 2026-09-16 05:15 UTCEPSS rescore
  23. 2026-09-15 07:38 UTCEG score recompute
  24. 2026-09-15 07:38 UTCGHSA enrichment
  25. 2026-09-15 03:12 UTCEPSS rescore
  26. 2026-09-14 09:33 UTCEG score recompute
  27. 2026-09-14 09:33 UTCGHSA enrichment
  28. 2026-09-13 11:28 UTCEG score recompute
  29. 2026-09-13 11:28 UTCGHSA enrichment
  30. 2026-09-12 15:02 UTCEPSS rescore
  31. 2026-09-12 13:23 UTCEG score recompute
  32. 2026-09-12 13:23 UTCGHSA enrichment
  33. 2026-09-11 15:17 UTCEG score recompute
  34. 2026-09-11 15:17 UTCGHSA enrichment
  35. 2026-09-11 14:53 UTCEPSS rescore
  36. 2026-09-10 17:08 UTCEG score recompute
  37. 2026-09-10 17:08 UTCGHSA enrichment
  38. 2026-09-10 09:35 UTCEPSS rescore
  39. 2026-09-09 19:03 UTCEG score recompute
  40. 2026-09-09 19:02 UTCGHSA enrichment
  41. 2026-09-08 22:01 UTCEPSS rescore
  42. 2026-09-08 20:57 UTCGHSA enrichment
  43. 2026-09-07 18:55 UTCEG score recompute
  44. 2026-09-07 18:55 UTCGHSA enrichment
  45. 2026-09-06 20:50 UTCEG score recompute
  46. 2026-09-06 20:50 UTCGHSA enrichment
  47. 2026-09-06 13:48 UTCEPSS rescore
  48. 2026-09-05 22:44 UTCEG score recompute
  49. 2026-09-05 22:44 UTCGHSA enrichment
  50. 2026-09-05 00:37 UTCEG score recompute
  51. 2026-09-05 00:37 UTCGHSA enrichment
  52. 2026-09-04 05:07 UTCEPSS rescore
  53. 2026-09-03 23:13 UTCGHSA enrichment
  54. 2026-09-02 23:23 UTCEG score recompute
  55. 2026-09-02 23:23 UTCGHSA enrichment
  56. 2026-09-02 14:12 UTCEPSS rescore
  57. 2026-09-02 00:51 UTCEG score recompute
  58. 2026-09-02 00:51 UTCGHSA enrichment
  59. 2026-09-01 13:54 UTCEPSS rescore
  60. 2026-09-01 04:40 UTCEPSS rescore
  61. 2026-09-01 04:40 UTCEPSS rescore
  62. 2026-09-01 02:46 UTCGHSA enrichment
  63. 2026-08-31 04:32 UTCEG score recompute
  64. 2026-08-31 04:32 UTCGHSA enrichment
  65. 2026-08-30 19:18 UTCEPSS rescore
  66. 2026-08-30 19:17 UTCEPSS rescore
  67. 2026-08-30 06:27 UTCEG score recompute
  68. 2026-08-30 06:27 UTCGHSA enrichment
  69. 2026-08-30 01:22 UTCEPSS rescore
  70. 2026-08-29 08:22 UTCEG score recompute
  71. 2026-08-29 08:22 UTCGHSA enrichment
  72. 2026-08-28 21:42 UTCEPSS rescore
  73. 2026-08-27 20:40 UTCGHSA enrichment
  74. 2026-08-26 22:35 UTCEG score recompute
  75. 2026-08-26 22:35 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-73611?
CVE-2026-73611 is a medium vulnerability published on August 13, 2026. File Browser versions from 2.50.0 through 2.63.21 fail to validate JWT expiration when proxy authentication is configured with a non-default logout page. Attackers with a previously valid token can access protected routes and administrative endpoints indefinitely, and exchange expired tokens for…
When was CVE-2026-73611 disclosed?
CVE-2026-73611 was first published on August 13, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73611 actively exploited?
CVE-2026-73611 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (35th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73611?
CVE-2026-73611 has a CVSS base score of 6.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73611?
A fix for CVE-2026-73611 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73611 are linked in the Vendor Advisories panel on this page.

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