Vulnerability · Published Nov 8, 2026 · Assigned by VulnCheck
CVE-2026-123523Vikunja before 2.7.1 Memory Exhaustion via Unbounded Avatar Size Cache
Medium 6.5
In plain English
A medium-severity resource allocation without limits in vikunja from go-vikunja. There are no confirmed reports of exploitation so far.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)–no EPSS score yet
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| go-vikunja | vikunja | 0 – before 2.7.1 |
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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