CVE-2026-85389: Worklenz before 3.0.0 Authorization Bypass on Task-Scoped Endpoints

Severity: medium (CVSS 6.5 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: 2026-09-03 · updated 2026-09-14
Weakness: CWE-639

Description

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.

Affected products

worklenz: before 3.0.0 — fixed in 3.0.0

How to fix

Upgrade to a fixed version: worklenz 3.0.0. Check the vendor advisory for mitigations.

References

https://github.com/Worklenz/worklenz
https://github.com/Worklenz/worklenz/blob/v3.0.0/worklenz-backend/src/middlewares/verify-task-access.ts
https://github.com/Worklenz/worklenz/commit/f088ad0e36a23bb52857b46b3d4ce2533daeb65f
https://github.com/Worklenz/worklenz/issues/396
https://github.com/Worklenz/worklenz/releases/tag/v3.0.0
https://www.vulncheck.com/advisories/worklenz-before-3.0.0-authorization-bypass-on-task-scoped-endpoints

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