CVE-2026-72839

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH 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: 0%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(high)
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
0%
EPSS %ILE
33%
KEV
Not listed

Published

August 13, 2026

Last Modified

August 14, 2026

Advisory Details (2)

Auto-updated Aug 14, 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 61× in last 7d / 66× 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. 2026-08-21 04:23 UTCGHSA enrichment
  2. 2026-08-21 00:20 UTCEG score recompute
  3. 2026-08-21 00:20 UTCGHSA enrichment
  4. 2026-08-20 22:56 UTCEPSS rescore
  5. 2026-08-20 20:18 UTCGHSA enrichment
  6. 2026-08-20 16:15 UTCGHSA enrichment
  7. 2026-08-20 12:12 UTCGHSA enrichment
  8. 2026-08-20 08:09 UTCGHSA enrichment
  9. 2026-08-20 04:06 UTCGHSA enrichment
  10. 2026-08-20 00:03 UTCGHSA enrichment
  11. 2026-08-19 19:59 UTCEG score recompute
  12. 2026-08-19 19:59 UTCGHSA enrichment
  13. 2026-08-19 17:04 UTCEPSS rescore
  14. 2026-08-19 15:57 UTCGHSA enrichment
  15. 2026-08-19 11:52 UTCGHSA enrichment
  16. 2026-08-19 07:49 UTCGHSA enrichment
  17. 2026-08-19 03:44 UTCGHSA enrichment
  18. 2026-08-18 23:41 UTCGHSA enrichment
  19. 2026-08-18 19:39 UTCGHSA enrichment
  20. 2026-08-18 15:36 UTCEG score recompute
  21. 2026-08-18 15:36 UTCGHSA enrichment
  22. 2026-08-18 13:49 UTCEPSS rescore
  23. 2026-08-18 13:49 UTCEPSS rescore
  24. 2026-08-18 11:23 UTCGHSA enrichment
  25. 2026-08-18 07:19 UTCGHSA enrichment
Show 41 more
  1. 2026-08-18 03:16 UTCGHSA enrichment
  2. 2026-08-17 23:12 UTCGHSA enrichment
  3. 2026-08-17 19:09 UTCGHSA enrichment
  4. 2026-08-17 14:17 UTCEG score recompute
  5. 2026-08-17 14:17 UTCGHSA enrichment
  6. 2026-08-17 13:47 UTCEPSS rescore
  7. 2026-08-17 10:15 UTCGHSA enrichment
  8. 2026-08-17 06:13 UTCGHSA enrichment
  9. 2026-08-17 02:11 UTCGHSA enrichment
  10. 2026-08-16 22:09 UTCGHSA enrichment
  11. 2026-08-16 18:06 UTCEG score recompute
  12. 2026-08-16 18:06 UTCGHSA enrichment
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 14:03 UTCGHSA enrichment
  16. 2026-08-16 10:01 UTCGHSA enrichment
  17. 2026-08-16 05:58 UTCEG score recompute
  18. 2026-08-16 05:58 UTCGHSA enrichment
  19. 2026-08-16 02:15 UTCEPSS rescore
  20. 2026-08-16 01:56 UTCGHSA enrichment
  21. 2026-08-15 21:53 UTCGHSA enrichment
  22. 2026-08-15 17:50 UTCGHSA enrichment
  23. 2026-08-15 13:47 UTCGHSA enrichment
  24. 2026-08-15 09:44 UTCGHSA enrichment
  25. 2026-08-15 05:41 UTCGHSA enrichment
  26. 2026-08-15 01:38 UTCEG score recompute
  27. 2026-08-15 01:38 UTCGHSA enrichment
  28. 2026-08-15 01:31 UTCEPSS rescore
  29. 2026-08-14 21:36 UTCGHSA enrichment
  30. 2026-08-14 17:33 UTCEG score recompute
  31. 2026-08-14 17:33 UTCGHSA enrichment
  32. 2026-08-14 16:25 UTCEG score recompute
  33. 2026-08-14 16:25 UTCGHSA enrichment
  34. 2026-08-14 14:35 UTCGHSA enrichment
  35. 2026-08-14 10:32 UTCGHSA enrichment
  36. 2026-08-14 06:30 UTCGHSA enrichment
  37. 2026-08-14 02:27 UTCEG score recompute
  38. 2026-08-14 02:27 UTCGHSA enrichment
  39. 2026-08-13 22:25 UTCEG score recompute
  40. 2026-08-13 22:09 UTCEG score recompute
  41. 2026-08-13 22:09 UTCMITRE cvelistV5first tracked

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 August 14, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 67.2% 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.

Dependency Blast Radius

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