Path Traversal in Wekan
CVE-2026-52890
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.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.005 (39.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L.
Affected products
- Wekan — versions < 9.31
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-52890?
- CVE-2026-52890 is a high-severity vulnerability in Wekan, classified under Path Traversal. CVSS score: 7.1/10. Published 2026-07-15.
- How severe is CVE-2026-52890?
- High severity. CVSS v3 base score is 7.1 out of 10.