CVE-2026-91980CWE-200information-disclosure

CVE-2026-91980

Medium · published September 15, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
22.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00306 · 22.2th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2026-09-15T20:17Z
References (3)
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-39p5-2wrr-xh29 · [email protected]https://www.vulncheck.com/advisories/vikunja-before-2.6.0-team-enumeration-via-project-share · [email protected]https://github.com/go-vikunja/vikunja/security/advisories/GHSA-39p5-2wrr-xh29 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 15 SEP 15:18Z
    vikunja before 2.6.0 Team Enumeration via Project Share
    cvelistv5