CVE-2026-52890

Wekan: Arbitrary file read and server DoS via attachment versions.original.path

State: Published
Severity: 7.1 High
Published: Jul 15, 2026
Updated: Jul 16, 2026
Reserved: Jun 8, 2026

Description

Wekan is open source kanban built with Meteor. Prior to 9.31, Wekan allows a logged-in board member to insert an attachment document through the /attachments/insert DDP method with attacker-controlled versions.original.path and versions.original.storage fields. The server/permissions/attachments.js insert rule checks only board write access, and FileStoreStrategyFilesystem.getReadStream() in models/lib/fileStoreStrategy.js streams the stored path without a storage-root containment check, allowing arbitrary file reads and denial of service through special files such as /dev/zero. This issue is fixed in version 9.31.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L	GitHub_M

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
wekanwekan	< 9.31Affected

References

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