Vulnerability · Published Jul 15, 2026 · Assigned by GitHub_M

CVE-2026-52890Wekan: Arbitrary file read and server DoS via attachment versions.original.path

High 7.1

In plain English

A high-severity path traversal in wekan from wekan. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).

Severity (CVSS 3.1)7.1High

Exploit odds (30 days)0.5%top 58.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
wekan	wekan	< 9.31

Weakness: CWE-22, CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L

References

https://github.com/wekan/wekan/security/advisories/GHSA-g6vm-7757-pr88 x_refsource_CONFIRM
https://github.com/wekan/wekan/commit/fc92b342ceedcf38dbd614a0f7b50d6dc2b22eb8 x_refsource_MISC
https://github.com/wekan/wekan/releases/tag/v9.31 x_refsource_MISC