Vikunja before 2.2.1 contains an authorization flaw where the LinkSharing.ReadAll endpoint exposes share hashes to users with read access, enabling permission escalation to admin-level shares. The GetTaskAttachment endpoint performs permission checks against user-supplied task IDs but fetches attachments by sequential ID without verifying ownership, allowing attackers to download and delete all file attachments across all projects instance-wide.
Metrics
Affected Vendors & Products
References
History
Fri, 10 Jul 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Fri, 10 Jul 2026 14:45:00 +0000
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| Description | Vikunja before 2.2.1 contains an authorization flaw where the LinkSharing.ReadAll endpoint exposes share hashes to users with read access, enabling permission escalation to admin-level shares. The GetTaskAttachment endpoint performs permission checks against user-supplied task IDs but fetches attachments by sequential ID without verifying ownership, allowing attackers to download and delete all file attachments across all projects instance-wide. | |
| Title | Vikunja - Unauthenticated Instance-Wide Data Breach via Link Share Hash Disclosure Chained with Cross-Project Attachment IDOR | |
| First Time appeared |
Vikunja
Vikunja vikunja |
|
| Weaknesses | CWE-639 | |
| CPEs | cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Vikunja
Vikunja vikunja |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-07-10T17:00:55.985Z
Reserved: 2026-06-22T21:55:17.942Z
Link: CVE-2026-56765
Updated: 2026-07-10T16:40:08.581Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-07-10T15:30:16Z