CVE-2026-123501

CVSS 7.1 (high) · published 2026-11-08

Vikunja before 2.7.1 contains an uncontrolled resource consumption vulnerability that allows authenticated users to exhaust server memory through concurrent image decodes in avatar and background uploads. Attackers can send several parallel tiny, highly compressible PNGs decoded at up to 50 megapixels each, pushing the API process into memory pressure or an OOM kill.

Weakness: CWE-400

Source: NVD CVE-2026-123501

References

• https://github.com/go-vikunja/vikunja/security/advisories/GHSA-9hxw-pxcq-4q8q
• https://www.vulncheck.com/advisories/vikunja-before-2.7.1-memory-exhaustion-dos-via-unbounded-image-decodes

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