CVE-2026-91979

Medium

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductCode.vikunja.io/api

PublishedSep 15, 2026

First seenSep 15, 2026

Weakness typeCWE-400Uncontrolled resource consumption

How to fix

Update

code.vikunja.io/api2.6.0 or later

Vendor advisories

github.com/go-vikunja/vikunja/security/advisories/GHSA-w7jp-mf2v-8342

Affected products

Product	Affected versions	Fixed in
code.vikunja.io/apiGo	v < 2.6.0, No range specified	2.6.0

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