CVE-2026-68899

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Source
https://cve.org/CVERecord?id=CVE-2026-68899
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68899.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-68899
Aliases
  • GHSA-jhph-whx8-wq6p
Published
2026-08-19T19:26:06Z
Modified
2026-09-11T03:31:00Z
Severity
  • 8.7 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N CVSS Calculator
Summary
Wekan: File Upload MIME Type Validation Bypass — Stored XSS via Missing System Binary Fallback
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-434"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68899.json"
}
References

Affected packages

Git / github.com/wekan/wekan

Affected ranges

Type
GIT
Repo
https://github.com/wekan/wekan
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
f6ba472f6738bcd3763f133d3d9970f216df2263
Fixed
0b8564d8c80f9d4aa455ccd301e6b2add1846360
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "9.90"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

4.*
4.30
4.31
Other
stable
v0.*
v0.10-rc2
v0.10.0
v0.10.0-rc1
v0.10.0-rc3
v0.10.0-rc4
v0.11.0-rc1
v0.11.0-rc2
v0.11.1-rc1
v0.11.1-rc2
v0.12
v0.13
v0.16
v0.17
v0.18
v0.19
v0.20
v0.21
v0.22
v0.23
v0.24
v0.25
v0.26
v0.27
v0.28
v0.29
v0.30
v0.31
v0.32
v0.33
v0.34
v0.35
v0.36
v0.37
v0.38
v0.39
v0.40
v0.41
v0.42
v0.43
v0.44
v0.45
v0.46
v0.47
v0.48
v0.49
v0.50
v0.51
v0.52
v0.54
v0.55
v0.56
v0.57
v0.58
v0.59
v0.60
v0.61
v0.62
v0.63
v0.65
v0.66
v0.67
v0.68
v0.69
v0.70
v0.71
v0.72
v0.73
v0.74
v0.75
v0.76
v0.77
v0.78
v0.79
v0.80
v0.81
v0.82
v0.83
v0.84
v0.85
v0.86
v0.87
v0.88
v0.89
v0.9.0-rc1
v0.9.0-rc2
v0.90
v0.91
v0.92
v0.93
v0.94
v0.95
v1.*
v1.06
v1.07
v1.08
v1.09
v1.10
v1.11
v1.12
v1.13
v1.14
v1.15
v1.16
v1.17
v1.18
v1.19
v1.20
v1.21
v1.23
v1.24
v1.25
v1.26
v1.27
v1.29
v1.30
v1.31
v1.32
v1.33
v1.34
v1.35
v1.36
v1.37
v1.38
v1.39
v1.40
v1.41
v1.42
v1.43
v1.44
v1.45
v1.46
v1.47
v1.49-edge-1
v1.49.1
v1.50.1
v1.50.2
v1.50.3
v1.51.1
v1.51.2
v1.52.1
v1.53.1
v1.53.2
v1.53.3
v1.53.4
v1.53.5
v1.53.6
v1.53.7
v1.53.8
v1.53.9
v1.55.1
v1.57
v1.58
v1.59
v1.60
v1.61
v1.62
v1.63
v1.64
v1.64.1
v1.64.2
v1.65
v1.66
v1.67
v1.68
v1.69
v1.69.2
v2.*
v2.60.1
v2.94
v2.98
v2.99
v3.*
v3.00
v3.01
v3.02
v3.03
v3.04
v3.05
v3.06
v3.07
v3.08
v3.09
v3.10
v3.11
v3.12
v3.13
v3.14
v3.15
v3.16
v3.17
v3.18
v3.19
v3.20
v3.21
v3.22
v3.23
v3.24
v3.25
v3.26
v3.27
v3.29
v3.30
v3.31
v3.32
v3.33
v3.34
v3.35
v3.36
v3.37
v3.38
v3.39
v3.40
v3.41
v3.42
v3.43
v3.44
v3.45
v3.46
v3.47
v3.48
v3.49
v3.50
v3.51
v3.52
v3.53
v3.54
v3.55
v3.56
v3.57
v3.58
v3.59
v3.60
v3.61
v3.62
v3.63
v3.64
v3.65
v3.66
v3.67
v3.68
v3.69
v3.70
v3.71
v3.73
v3.74
v3.75
v3.76
v3.77
v3.78
v3.79
v3.80
v3.81
v3.82
v3.83
v3.84
v3.85
v3.86
v3.87
v3.88
v3.89
v3.90
v3.91
v3.92
v3.93
v3.94
v3.95
v3.96
v3.97
v3.98
v3.99
v4.*
v4.00
v4.01
v4.02
v4.03
v4.04
v4.05
v4.06
v4.07
v4.08
v4.09
v4.10
v4.11
v4.12
v4.13
v4.14
v4.15
v4.16
v4.17
v4.18
v4.19
v4.20
v4.21
v4.22
v4.23
v4.24
v4.25
v4.26
v4.27
v4.28
v4.29
v4.32
v4.33
v4.34
v4.35
v4.36
v4.37
v4.38
v4.39
v4.40
v4.41
v4.42
v4.43
v4.44
v4.45
v4.46
v4.47
v4.48
v4.49
v4.50
v4.51
v4.52
v4.53
v4.54
v4.55
v4.56
v4.57
v4.58
v4.59
v4.60
v4.61
v4.62
v4.63
v4.64
v4.65
v4.66
v4.67
v4.68
v4.69
v4.70
v4.71
v4.72
v4.73
v4.74
v4.75
v4.76
v4.77
v4.78
v4.79
v4.80
v4.81
v4.82
v4.83
v4.84
v4.85
v4.86
v4.87
v4.88
v4.89
v4.90
v4.91
v4.92
v4.93
v4.94
v4.95
v4.96
v4.98
v4.99
v5.*
v5.00
v5.01
v5.02
v5.03
v5.04
v5.05
v5.06
v5.07
v5.08
v5.09
v5.10
v5.11
v5.12
v5.13
v5.14
v5.15
v5.16
v5.17
v5.18
v5.19
v5.20
v5.21
v5.22
v5.23
v5.24
v5.25
v5.26
v5.27
v5.29
v5.30
v5.31
v5.32
v5.33
v5.34
v5.35
v5.36
v5.37
v5.38
v5.39
v5.40
v5.41
v5.42
v5.43
v5.44
v5.45
v5.46
v5.47
v5.48
v5.49
v5.50
v5.51
v5.52
v5.53
v5.54
v5.55
v5.56
v5.57
v5.58
v5.59
v5.60
v5.61
v5.62
v5.63
v5.64
v5.65
v5.66
v5.67
v5.68
v5.69
v5.70
v5.71
v5.72
v5.73
v5.74
v5.75
v5.76
v5.77
v5.78
v5.79
v5.80
v5.81
v5.82
v5.83
v5.84
v5.85
v5.86
v5.87
v5.88
v5.89
v5.90
v5.91
v5.92
v5.93
v5.94
v5.95
v5.96
v5.97
v5.98
v5.99
v6.*
v6.00
v6.01
v6.02
v6.03
v6.04
v6.05
v6.10
v6.11
v6.12
v6.13
v6.14
v6.15
v6.16
v6.17
v6.18
v6.23
v6.24
v6.25
v6.26
v6.27
v6.28
v6.29
v6.30
v6.31
v6.32
v6.33
v6.34
v6.35
v6.36
v6.37
v6.38
v6.39
v6.40
v6.41
v6.42
v6.43
v6.44
v6.45
v6.46
v6.47
v6.48
v6.49
v6.50
v6.51
v6.52
v6.53
v6.54
v6.55
v6.56
v6.57
v6.58
v6.59
v6.60
v6.61
v6.62
v6.65
v6.67
v6.68
v6.69
v6.70
v6.71
v6.72
v6.73
v6.74
v6.75
v6.76
v6.77
v6.78
v6.79
v6.80
v6.81
v6.82
v6.83
v6.84
v6.85
v6.86
v6.87
v6.88
v6.89
v6.90
v6.91
v6.92
v6.93
v6.95
v6.96
v6.97
v6.98
v6.99
v6.99.1
v6.99.2
v6.99.3
v6.99.4
v6.99.5
v6.99.6
v6.99.7
v6.99.8
v6.99.9
v7.*
v7.00
v7.01
v7.02
v7.03
v7.04
v7.05
v7.06
v7.07
v7.08
v7.09
v7.10
v7.11
v7.12
v7.14
v7.15
v7.16
v7.17
v7.18
v7.19
v7.20
v7.21
v7.22
v7.23
v7.24
v7.25
v7.26
v7.27
v7.28
v7.29
v7.30
v7.31
v7.32
v7.33
v7.34
v7.35
v7.36
v7.37
v7.38
v7.39
v7.40
v7.41
v7.42
v7.43
v7.44
v7.45
v7.46
v7.47
v7.48
v7.49
v7.50
v7.51
v7.52
v7.53
v7.54
v7.55
v7.56
v7.57
v7.58
v7.59
v7.60
v7.61
v7.62
v7.63
v7.64
v7.65
v7.67
v7.68
v7.69
v7.70
v7.71
v7.72
v7.73
v7.74
v7.75
v7.76
v7.77
v7.78
v7.79
v7.80
v7.81
v7.82
v7.83
v7.84
v7.85
v7.86
v7.87
v7.88
v7.89
v7.90
v7.91
v7.92
v7.93
v7.95
v7.96
v7.97
v7.98
v7.99
v8.*
v8.00
v8.01
v8.02
v8.03
v8.04
v8.05
v8.06
v8.08
v8.09
v8.10
v8.11
v8.12
v8.14
v8.15
v8.16
v8.17
v8.18
v8.19
v8.20
v8.21
v8.22
v8.23
v8.24
v8.25
v8.26
v8.27
v8.28
v8.29
v8.30
v8.31
v8.32
v8.33
v8.34
v8.38
v8.39
v8.40
v8.43
v8.44
v8.45
v8.46
v8.47
v8.48
v8.49
v8.50
v8.51
v8.52
v8.53
v8.54
v8.55
v8.56
v8.57
v8.58
v8.59
v8.60
v8.61
v8.62
v8.63
v8.64
v8.65
v8.67
v8.68
v8.69
v8.70
v8.71
v8.72
v8.73
v8.74
v8.75
v8.76
v8.77
v8.78
v8.79
v8.80
v8.81
v8.82
v8.83
v8.84
v8.85
v8.86
v8.87
v8.88
v8.89
v8.90
v8.91
v8.92
v8.93
v8.94
v8.97
v8.98
v9.*
v9.00
v9.01
v9.02
v9.03
v9.04
v9.05
v9.06
v9.07
v9.08
v9.09
v9.10
v9.11
v9.12
v9.14
v9.15
v9.16
v9.17
v9.18
v9.19
v9.20
v9.21
v9.22
v9.23
v9.24
v9.25
v9.26
v9.27
v9.28
v9.29
v9.30
v9.31
v9.35
v9.36
v9.37
v9.38
v9.39
v9.40
v9.41
v9.42
v9.43
v9.44
v9.45
v9.46
v9.47
v9.48
v9.49
v9.50
v9.51
v9.52
v9.53
v9.54
v9.55
v9.56
v9.57
v9.59
v9.60
v9.61
v9.62
v9.63
v9.64
v9.65
v9.67
v9.68
v9.69
v9.70
v9.71
v9.72
v9.73
v9.74
v9.75
v9.76
v9.77
v9.78
v9.79
v9.80
v9.81
v9.82
v9.83
v9.84
v9.85
v9.86
v9.87
v9.88
v9.89

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68899.json"