CVE-2026-68899

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 67% 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, secondary
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.7Exploit: None knownExposed: 0

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

Wekan is open source kanban built with Meteor. Prior to 9.90, isFileValid() in models/fileValidation.js used the Unix file command for content-based MIME detection, but detectMimeFromFile() silently returned undefined when that binary was unavailable and the validation fell back to the attacker-controlled fileObj.type supplied through server/routes/attachmentApi.js. On deployments with WITH_API=true and no file binary, an authenticated board member could label HTML containing JavaScript as image/png, bypass the dangerous MIME check, and store active content under the Wekan origin for execution when another user opened it. Version 9.90 adds looksLikeDangerousMarkup() to inspect file bytes and force dangerous-content scanning when MIME detection is unavailable. This issue is fixed in version 9.90.

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity87% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

August 19, 2026

Last Modified

August 21, 2026

Advisory Details (3)

Auto-updated Aug 19, 2026
Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

v9.90

Patch available: wekan/wekan v9.90

https://github.com/wekan/wekan/releases/tag/v9.90
github_commit

commit f6ba472f6738 (wekan/wekan)

Fix landed in wekan/wekan commit f6ba472f6738 — awaiting tagged release

https://github.com/wekan/wekan/commit/f6ba472f6738bcd3763f133d3d9970f216df2263
github Patch Available

File Upload MIME Type Validation Bypass — Stored XSS via Missing System Binary Fallback · Advisory · wekan/wekan · GitHub

https://github.com/wekan/wekan/security/advisories/GHSA-jhph-whx8-wq6p

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 20× 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. 2026-08-29 01:47 UTCEG score recompute
  2. 2026-08-28 21:42 UTCEPSS rescore
  3. 2026-08-28 00:45 UTCEG score recompute
  4. 2026-08-27 00:18 UTCEG score recompute
  5. 2026-08-26 14:47 UTCEPSS rescore
  6. 2026-08-25 23:54 UTCEG score recompute
  7. 2026-08-25 13:49 UTCEPSS rescore
  8. 2026-08-24 23:32 UTCEG score recompute
  9. 2026-08-24 11:21 UTCEG score recompute
  10. 2026-08-23 10:59 UTCEG score recompute
  11. 2026-08-23 00:19 UTCEPSS rescore
  12. 2026-08-22 10:37 UTCEG score recompute
  13. 2026-08-21 23:49 UTCEPSS rescore
  14. 2026-08-21 22:26 UTCEG score recompute
  15. 2026-08-21 22:00 UTCEG score recompute
  16. 2026-08-21 08:54 UTCEG score recompute
  17. 2026-08-20 22:56 UTCEPSS rescore
  18. 2026-08-19 20:21 UTCEG score recompute
  19. 2026-08-19 19:33 UTCEG score recompute
  20. 2026-08-19 19:32 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-68899?
CVE-2026-68899 is a high vulnerability published on August 19, 2026. Wekan is open source kanban built with Meteor. Prior to 9.90, isFileValid() in models/fileValidation.js used the Unix file command for content-based MIME detection, but detectMimeFromFile() silently returned undefined when that binary was unavailable and the validation fell back to the…
When was CVE-2026-68899 disclosed?
CVE-2026-68899 was first published in the National Vulnerability Database on August 19, 2026, with the most recent update on August 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-68899 actively exploited?
CVE-2026-68899 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 66.6% of all scored CVEs.
What is the CVSS score of CVE-2026-68899?
CVE-2026-68899 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-68899?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-68899, 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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