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[ CVE-2026-91979 · Published 15 Sep 2026 ]

Vikunja: Denial of service via decompression bomb in the data import

CVSS 6.5 EPSS <1%Fix available

[ Description ]Official description

Vikunja before 2.6.0 fails to limit archive expansion during data import, allowing authenticated users to cause denial of service. Attackers can upload highly compressed files that expand to tens of gigabytes in memory and disk, exhausting server resources and crashing the instance.

[ Fixes ]Fixes and patches

  • code.vikunja.io/api 2.6.0Fixed version · GitHub Advisories · go package code.vikunja.io/api: upgrade to 2.6.0 or later (affected <= 2.5.0)

[ Packages ]Affected open-source packages

[ References ]References