CVE-2026-72839

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-14. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

filebrowser through 2.63.16 fails to properly restrict scope and permissions when self-signup is enabled with default CreateUserDir setting. Unauthenticated attackers can register accounts that inherit the server root scope with full create, modify, delete, rename, share, and download permissions, allowing unrestricted access to all files.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

August 13, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Sep 16, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Self-signup users inherit the server root as their scope · Advisory · filebrowser/filebrowser · GitHub

https://github.com/filebrowser/filebrowser/security/advisories/GHSA-6759-996p-gpj6
generic

filebrowser through 2.63.16 Privilege Escalation via Signup | Advisories | VulnCheck

https://www.vulncheck.com/advisories/filebrowser-through-privilege-escalation-via-signup

Vendor Advisories for CVE-2026-72839(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 47× in last 7d / 208× 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 276 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-72839?
CVE-2026-72839 is a critical vulnerability published on August 13, 2026. filebrowser through 2.63.16 fails to properly restrict scope and permissions when self-signup is enabled with default CreateUserDir setting. Unauthenticated attackers can register accounts that inherit the server root scope with full create, modify, delete, rename, share, and download permissions,…
When was CVE-2026-72839 disclosed?
CVE-2026-72839 was first published in the National Vulnerability Database on August 13, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72839 actively exploited?
CVE-2026-72839 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 57.3% of all scored CVEs.
What is the CVSS score of CVE-2026-72839?
CVE-2026-72839 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-72839?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72839, 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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