by Kastro
Paper/Archive/CVE-2026-27575

CVE-2026-27575

go-vikunja vikunja — Vijkunja has Weak Password Policy Combined with Persistent Sessions After Password Change

EPSS 0.5%public exploitCVSS 9.1
critical.is priorityof 100
46
CVSS 9.1 (CNA)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 40.9.409 × 208.2Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

Vikunja is an open-source self-hosted task management platform. Prior to version 2.0.0, the application allows users to set weak passwords (e.g., 1234, password) without enforcing minimum strength requirements. Additionally, active sessions remain valid after a user changes their password. An attacker who compromises an account (via brute-force or credential stuffing) can maintain persistent access even after the victim resets their password. Version 2.0.0 contains a fix.

Affected

ProductAffectedFixed inSource
vikunja< 2.0.0–CNA

Scores by source

GitHub_M (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

refgithub.com/go-vikunja/vikunja/security/advisories/GHSA-3ccg-x393-96v8refvikunja.io/changelog/vikunja-v2.0.0-was-released