Vikunja: Link-share token reads any tenant's kanban buckets and enumerates usernames/IDs instance-wide (BOLA) — GHSA-RJ9J-8772-4H6C

Summary

## Summary The task-collection endpoint `GET /api/v1/projects/{project}/views/{view}/tasks` loads the requested project view straight from the URL path without verifying the caller is authorized for it. For a **link-share token**, the task query is correctly pinned to the share's own project, but the *view* is taken from the attacker-controlled path and never re-validated against the share. A holder of a share link…

Timeline

Published by source

2026-10-09

Risk context

• Reported severity or threat level: critical.
• Reported CVSS score: 9.3 out of 10.
• Reported EPSS value: 0.00357.
• Review exposure for the affected product or family: go: code.vikunja.io/api.

Product

go: code.vikunja.io/api

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

GHSA-RJ9J-8772-4H6C

Source

GitHub

Vendor

GitHub

Published by source

2026-10-09

Last source activity

2026-10-09

Additional identifiers

CVE-2026-68582

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.