What is CVE-2026-91985?

CVE-2026-91985 is a high-severity vulnerability in Go-Vikunja Vikunja, classified under Information Disclosure. CVSS score: 7.5/10. Published 2026-09-15.

How severe is CVE-2026-91985?

High severity. CVSS v3 base score is 7.5 out of 10.

Information disclosure in Go-Vikunja Vikunja

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 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.

Vulnerability class: Information Disclosure

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Go-vikunja Vikunja

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-91985?: CVE-2026-91985 is a high-severity vulnerability in Go-Vikunja Vikunja, classified under Information Disclosure. CVSS score: 7.5/10. Published 2026-09-15.
How severe is CVE-2026-91985?: High severity. CVSS v3 base score is 7.5 out of 10.