Medium severity4.3NVD Advisory· Published Sep 15, 2026· Updated Sep 15, 2026

CVE-2026-91980

Description

vikunja before 2.6.0 fails to validate team access when attaching teams to projects, allowing authenticated users to enumerate all teams and members. Attackers can attach arbitrary team IDs via the project teams endpoint to retrieve complete team rosters including member names and admin flags for unauthorized teams.

Affected products

Go Vikunja/Vikunjallm-fuzzy
Range: <2.6.0

Patches

Vulnerability mechanics

References

github.com/go-vikunja/vikunja/security/advisories/GHSA-39p5-2wrr-xh29nvd
www.vulncheck.com/advisories/vikunja-before-2.6.0-team-enumeration-via-project-sharenvd

News mentions

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cvss	0.280
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000