EUVD-2026-14927
GHSA-f95f-77jx-fcjc
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4Description
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the `DELETE /api/v1/projects/:project/shares/:share` endpoint does not verify that the link share belongs to the project specified in the URL. An attacker with admin access to any project can delete link shares from other projects by providing their own project ID combined with the target share ID. Version 2.2.1 patches the issue.
Analysis
Vikunja prior to version 2.2.1 contains an authorization bypass vulnerability in the DELETE /api/v1/projects/:project/shares/:share endpoint that fails to verify link share ownership. An attacker with administrative access to any project can delete link shares from arbitrary other projects by combining their own project ID with a target share ID, effectively allowing cross-project share manipulation. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.
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Priority Score
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External POC / Exploit Code
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