Resource exhaustion in Go-Vikunja Vikunja
CVE-2026-123523
Vikunja before 2.7.1 contains an uncontrolled resource consumption vulnerability that allows authenticated users to exhaust server memory by requesting avatars at many distinct sizes. Attackers can upload a noisy avatar and fetch it at each size up to 1024, caching roughly a gigabyte per account without eviction and causing the API process to be OOM-killed.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-3x3m-2j93-w46j) (vendor-advisory)
- VulnCheck Advisory: Vikunja before 2.7.1 Memory Exhaustion via Unbounded Avatar Size Cache (third-party-advisory)
Frequently asked questions
- What is CVE-2026-123523?
- CVE-2026-123523 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-11-08.
- How severe is CVE-2026-123523?
- Medium severity. CVSS v3 base score is 6.5 out of 10.