CVE-2026-25561 HIGH

CVE-2026-25561: WeKan < 8.19 Attachment Upload Object Relationship Validation Bypass

Vendor Wekan
Product WeKan
Weakness CWE-863 · Incorrect authorization
Published February 7, 2026
Last update May 11, 2026
View on NVD All CVEs

CVSS base score

7.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

WeKan versions prior to 8.19 contain an authorization weakness in the attachment upload API. The API does not fully validate that provided identifiers (such as boardId, cardId, swimlaneId, and listId) are consistent and refer to a coherent card/board relationship, enabling attempts to upload attachments with mismatched object relationships.

Key dates

02Disclosure timeline

February 7, 2026 CVE published
May 11, 2026 Record updated