CVE-2026-68899

HIGHPre-NVD 8.78.7
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (43rd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
8.7EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
8.7HIGHmedium confidence
EG Risk
39
EG Risk 39/100

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 (value × EchelonGraph’s weight)
Severity87% × 45%
The EG Score, 8.7 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
43rd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 19, 2026

Last Modified

September 9, 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 advisoryMentions a patch (unverified)

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 13× in last 7d / 50× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  2. 2026-10-13 09:59 UTCEG score recompute
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  4. 2026-10-12 15:44 UTCEG score recompute
  5. 2026-10-11 19:29 UTCEG score recompute
  6. 2026-10-11 16:45 UTCEG score recompute
  7. 2026-10-11 14:06 UTCEG score recompute
  8. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  11. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  12. 2026-10-08 07:36 UTCEG score recompute
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  14. 2026-10-06 21:21 UTCEG score recompute
  15. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  16. 2026-10-06 07:56 UTCEG score recompute
  17. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  18. 2026-10-05 09:35 UTCEG score recompute
  19. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  20. 2026-10-03 16:54 UTCEG score recompute
  21. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  22. 2026-10-03 00:41 UTCEG score recompute
  23. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  24. 2026-10-01 22:46 UTCEG score recompute
  25. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
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  1. 2026-09-30 20:52 UTCEG score recompute
  2. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  3. 2026-09-30 08:41 UTCEG score recompute
  4. 2026-09-28 21:42 UTCEG score recompute
  5. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  6. 2026-09-27 18:22 UTCEG score recompute
  7. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  8. 2026-09-27 06:11 UTCEG score recompute
  9. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  10. 2026-09-24 20:34 UTCEG score recompute
  11. 2026-09-23 20:12 UTCEG score recompute
  12. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  13. 2026-09-22 19:49 UTCEG score recompute
  14. 2026-09-22 06:51 UTCEG score recompute
  15. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  16. 2026-09-21 06:28 UTCEG score recompute
  17. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  18. 2026-09-19 17:01 UTCEG score recompute
  19. 2026-09-19 04:49 UTCEG score recompute
  20. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  21. 2026-09-18 03:54 UTCEG score recompute
  22. 2026-09-16 15:08 UTCEG score recompute
  23. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  24. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  25. 2026-09-15 14:45 UTCEG score recompute
  26. 2026-09-14 01:55 UTCEG score recompute
  27. 2026-09-13 01:33 UTCEG score recompute
  28. 2026-09-12 01:11 UTCEG score recompute
  29. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  30. 2026-09-11 12:59 UTCEG score recompute
  31. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  32. 2026-09-10 12:18 UTCEG score recompute
  33. 2026-09-09 02:33 UTCEG score recompute
  34. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  35. 2026-09-07 18:48 UTCEG score recompute
  36. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  37. 2026-09-06 18:10 UTCEG score recompute
  38. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  39. 2026-09-05 17:47 UTCEG score recompute
  40. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  41. 2026-09-04 17:25 UTCEG score recompute
  42. 2026-09-04 05:08 UTCEG score recompute
  43. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  44. 2026-09-02 16:06 UTCEG score recompute
  45. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  46. 2026-09-01 15:24 UTCEG score recompute
  47. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  48. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  49. 2026-08-31 02:37 UTCEG score recompute
  50. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  51. 2026-08-30 02:14 UTCEG score recompute
  52. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  53. 2026-08-29 01:47 UTCEG score recompute
  54. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  55. 2026-08-28 00:45 UTCEG score recompute
  56. 2026-08-27 00:18 UTCEG score recompute
  57. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  58. 2026-08-25 23:54 UTCEG score recompute
  59. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  60. 2026-08-24 23:32 UTCEG score recompute
  61. 2026-08-24 11:21 UTCEG score recompute
  62. 2026-08-23 10:59 UTCEG score recompute
  63. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  64. 2026-08-22 10:37 UTCEG score recompute
  65. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  66. 2026-08-21 22:26 UTCEG score recompute
  67. 2026-08-21 22:00 UTCEG score recompute
  68. 2026-08-21 08:54 UTCEG score recompute
  69. 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  70. 2026-08-19 20:21 UTCEG score recompute
  71. 2026-08-19 19:33 UTCEG score recomputeFirst assessed: 8.7 HIGH
  72. 2026-08-19 19:32 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-68899?
CVE-2026-68899 is a high-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-68899 published?
The CVE record for CVE-2026-68899 was published on August 19, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 9, 2026; the record at its source may have been updated since.
Is CVE-2026-68899 actively exploited?
CVE-2026-68899 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (43rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-68899?
CVE-2026-68899 has a CVSS base score of 8.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-68899?
A fix for CVE-2026-68899 is available: update to the fixed version the vendor names in its advisory.

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