Auth bypass in Worklenz
CVE-2026-85389
Worklenz before 3.0.0 fails to verify task ownership by organization when resolving task-scoped API endpoints, allowing authenticated users to access another tenant's task data. Attackers can query task endpoints with arbitrary task UUIDs to retrieve work logs, comments, attachments, and project insights belonging to other organizations.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (38.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
Weakness classification (CWE)
References
- github.com/Worklenz/worklenz (product)
- github.com/Worklenz/worklenz/blob/v3.0.0/worklenz-backend/src/middlewares/verif… (technical-description)
- github.com/Worklenz/worklenz/commit/f088ad0e36a23bb52857b46b3d4ce2533daeb65f (patch)
- github.com/Worklenz/worklenz/issues/396 (issue-tracking)
- github.com/Worklenz/worklenz/releases/tag/v3.0.0 (release-notes)
- www.vulncheck.com/advisories/worklenz-before-3.0.0-authorization-bypass-on-task… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-85389?
- CVE-2026-85389 is a medium-severity vulnerability in Worklenz, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-09-03.
- How severe is CVE-2026-85389?
- Medium severity. CVSS v3 base score is 6.5 out of 10.