HIGH 8.7 NVD
CVE-2026-91985
Vikunja before 2.6.0 fails to properly restrict access to the link-share hash field in single-share read endpoints, allowing read-only members to obtain the sha
Vikunja before 2.6.0 fails to properly restrict access to the link-share hash field in single-share read endpoints, allowing read-only members to obtain the share's secret credential. Attackers can exchange the disclosed hash for a link-share JWT at the share's permission level to escalate privileges and perform unauthorized writes or administrative actions.
References
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-qfwc-vx6f-3g6g
- https://www.vulncheck.com/advisories/vikunja-before-2.6.0-privilege-escalation-via-link-sh
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-09-15 via NVD.
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