What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-15 · updated 2026-07-16
• Weakness: CWE-22

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

• WeKan: before 9.31

References

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

Get alerted when CVE-2026-52890 or the next vulnerability affects your stack