Vikunja 1.0.0 before 2.7.1 Pagination Limit Bypass via page=0 Parameter

Advisories

Vikunja 1.0.0 before 2.7.1 Pagination Limit Bypass via page=0 Parameter

Severity: high
Date: 11/7/2026
Affecting: vikunja >= 1.0.0, < 2.7.1
CVE: CVE-2026-123531
CWE: CWE-400 Uncontrolled Resource Consumption
CVSS: 8.7
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References: GitHub Security Advisory (GHSA-v579-5fwc-gr28)
Credit: Ravin06
Description: Vikunja from 1.0.0 before 2.7.1 contains an uncontrolled resource consumption vulnerability that allows authenticated users to bypass service.maxitemsperpage by sending page=0 to /api/v1 list endpoints. Attackers can self-register and repeatedly request page=0 to force unbounded SQL queries, memory materialisation, and per-row query fan-out, degrading availability for other users.

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