CVE-2026-35602CWE-770

Vikunja has a File Size Limit Bypass via Vikunja Import

Medium · published April 10, 2026

CVSS v3.1
5.4
EPSS
1%
Percentile
45.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00554 · 45.5th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-04-10T16:10Z
EPSS history
Timeline
  • 10 APR 16:10Z
    Vikunja has a File Size Limit Bypass via Vikunja Import
    cvelistv5