Vulnerability · Published Mar 24, 2026 · Assigned by GitHub_M

CVE-2026-33474Vikunja Affected by DoS via Image Preview Generation

Medium 6.5

In plain English

A medium-severity uncontrolled resource consumption in vikunja from go-vikunja. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.3%top 74.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Vikunja is an open-source self-hosted task management platform. Starting in version 1.0.0-rc0 and prior to version 2.2.0, unbounded image decoding and resizing during preview generation lets an attacker exhaust CPU and memory with highly compressed but extremely large-dimension images. Version 2.2.0 patches the issue.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	code.vikunja.io/api	2.2.0	GHSA-wc83-79hj-hpmq
Go	code.vikunja.io/api	no fix listed	GO-2026-4811

Affected products (as reported)

Vendor	Product	Versions
go-vikunja	vikunja	>= 1.0.0-rc0, < 2.2.0

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-wc83-79hj-hpmq x_refsource_CONFIRM
https://vikunja.io/changelog/vikunja-v2.2.0-was-released x_refsource_MISC