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Medium · 5.4 CVE-2026-123526 EUVD-2026-119411GHSA-cg54-92gp-5457

Vikunja before 2.7.1 Mass Assignment via Team external_id Field

Published Nov 8, 2026 · Updated Nov 9, 2026 · Assigned by VulnCheck

Description

Vikunja before 2.7.1 contains a mass assignment vulnerability that allows any authenticated user to set the read-only external_id field through the team create and update endpoints. Attackers can tag a team they create or administer as externally managed, permanently blocking removal of every member and causing SSO members to be dropped from the team at their next login.

Affected products

VendorProductAffectedFixed
go-vikunja vikunja < 2.7.1 2.7.1

References