CVE-2026-72838

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-14. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

FileBrowser versions before 2.63.19 fail to enforce the declared Upload-Length in the TUS resumable-upload PATCH endpoint, allowing authenticated users to write arbitrary data to disk. Attackers can send oversized request bodies that exceed the declared upload length to exhaust available disk space and cause service unavailability.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

August 14, 2026

Last Modified

August 17, 2026

Advisory Details (3)

Auto-updated Aug 14, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
generic

FileBrowser before 2.63.19 Disk Exhaustion via TUS Upload | Advisories | VulnCheck

https://www.vulncheck.com/advisories/filebrowser-before-disk-exhaustion-via-tus-upload
github_commit

commit 4daddec6f200 (filebrowser/filebrowser)

Fix landed in filebrowser/filebrowser commit 4daddec6f200 — awaiting tagged release

https://github.com/filebrowser/filebrowser/commit/4daddec6f200b03a721197d8c0b4b652c994894e
github Patch Available🟡 PoC Available

TUS uploads ignore the declared Upload-Length, allowing disk exhaustion by authenticated users · Advisory · filebrowser/filebrowser · GitHub

Affected: v2.63.19 by commit

https://github.com/filebrowser/filebrowser/security/advisories/GHSA-ffv3-7h97-993q

Vendor Advisories for CVE-2026-72838(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 23× in last 7d / 23× 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. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 21:05 UTCGHSA enrichment
  3. 2026-08-19 19:36 UTCEG score recompute
  4. 2026-08-19 19:36 UTCGHSA enrichment
  5. 2026-08-19 17:04 UTCEPSS rescore
  6. 2026-08-18 18:06 UTCEG score recompute
  7. 2026-08-18 18:06 UTCGHSA enrichment
  8. 2026-08-18 13:49 UTCEPSS rescore
  9. 2026-08-18 13:49 UTCEPSS rescore
  10. 2026-08-17 16:25 UTCEG score recompute
  11. 2026-08-17 16:25 UTCGHSA enrichment
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-16 20:05 UTCEG score recompute
  14. 2026-08-16 20:05 UTCGHSA enrichment
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 14:56 UTCEPSS rescore
  17. 2026-08-16 02:15 UTCEPSS rescore
  18. 2026-08-15 18:36 UTCGHSA enrichment
  19. 2026-08-14 17:06 UTCEG score recompute
  20. 2026-08-14 17:06 UTCGHSA enrichment
  21. 2026-08-14 12:22 UTCEG score recompute
  22. 2026-08-14 11:49 UTCEG score recompute
  23. 2026-08-14 11:49 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-72838?
CVE-2026-72838 is a medium vulnerability published on August 14, 2026. FileBrowser versions before 2.63.19 fail to enforce the declared Upload-Length in the TUS resumable-upload PATCH endpoint, allowing authenticated users to write arbitrary data to disk. Attackers can send oversized request bodies that exceed the declared upload length to exhaust available disk space…
When was CVE-2026-72838 disclosed?
CVE-2026-72838 was first published in the National Vulnerability Database on August 14, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72838 actively exploited?
CVE-2026-72838 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 77.8% of all scored CVEs.
What is the CVSS score of CVE-2026-72838?
CVE-2026-72838 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-72838?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72838, 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

Explore the affected products and dependency analysis for CVE-2026-72838

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