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Vulnerability record · CVE-2026-35602 · published 10 April 2026

CVE-2026-35602: Vikunja allocation without limits vulnerability

Vikunja · Vikunja

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.

7.1 CVSS 3.1 High EPSS 0.55% · top 56.0% CWE-770 · Allocation without limits
7.1CVSS 3.1 base score
0.55%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/go-vikunja/vikunja/pull/2575 Issue Tracking
https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0 Release Notes
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-qh78-rvg3-cv54 ExploitVendor Advisory
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-qh78-rvg3-cv54 ExploitVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-35602), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.