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CVE

CVE-2026-52891

Wekan: Shell Injection via Avatar Upload
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CVE

CVE-2026-52891

Wekan: Shell Injection via Avatar Upload

Wekan is open source kanban built with Meteor. Prior to 9.07, Wekan avatar upload functionality embeds user-supplied filenames into paths later passed to child_process.exec() for MIME-type detection. Because models/avatars.js and models/fileValidation.js used a shell command with the avatar filename, shell metacharacters such as backticks and $() in the filename could execute commands on the server. This issue is fixed in version 9.07.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.9
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://github.com/wekan/wekan/releases/tag/v9.07, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52891.json, https://github.com/wekan/wekan/security/advisories/GHSA-35j7-h385-2q9g, https://nvd.nist.gov/vuln/detail/CVE-2026-52891, https://github.com/wekan/wekan/commit/a4c74a5980e9f778eb444fd346f32aa3d16786a9

Severity

9.9

CVSS Score
0
10

Basic Information

Base CVSS
9.9
EPSS Probability
0.00785%
EPSS Percentile
0.5356%
Introduced Version
0
Fix Available
ebaa31c1e0d56ba86aff10914d2cebc66f612cf5

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