Description
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.
Affected products
vikunja: vikunja
References4
- github.com/go-vikunja/vikunja/security/advisories/GHSA-qh78-rvg… ExploitVendor Advisory
- github.com/go-vikunja/vikunja/security/advisories/GHSA-qh78-rvg… ExploitVendor Advisory
- github.com/go-vikunja/vikunja/pull/2575 Issue Tracking
- github.com/go-vikunja/vikunja/releases/tag/v2.3.0 Release Notes
Metrics
- CVSS 3.1
-
7.1
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H - EPSS — exploit probability
- 0% percentile: 29 · as of 12 November 2026
- CWE
- CWE-770
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