Resource exhaustion in Go-Vikunja Vikunja
CVE-2026-35602
Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the Vikunja file import endpoint uses the attacker-controlled Size field from the JSON metadata inside the import zip instead of the actual decompressed file content length for the file size enforcement check. By setting Size to 0 in the JSON while including large compressed file entries in the zip, an attacker bypasses the configured maximum file size limit. This vulnerability is fixed in 2.3.0.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.006 (44.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.006 · change: +0.002
Affected products
- Go-Vikunja Vikunja — versions < 2.3.0
- Vikunja
Weakness classification (CWE)
References
- github.com/go-vikunja/vikunja/security/advisories/GHSA-qh78-rvg3-cv54 (Exploit, Vendor Advisory)
- github.com/go-vikunja/vikunja/pull/2575 (Issue Tracking)
- github.com/go-vikunja/vikunja/releases/tag/v2.3.0 (Release Notes)
Frequently asked questions
- What is CVE-2026-35602?
- CVE-2026-35602 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.4/10. Published 2026-04-10.
- How severe is CVE-2026-35602?
- Medium severity. CVSS v3 base score is 5.4 out of 10.