What is CVE-2026-27575?

CVE-2026-27575 is a critical-severity vulnerability in Go-Vikunja Vikunja, classified under Weak Password Requirements. CVSS score: 9.1/10. Published 2026-02-25.

How severe is CVE-2026-27575?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Go-Vikunja Vikunja

CVE-2026-27575

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.

Published 2026-02-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.005 (38.6th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000

Affected products

Go-Vikunja Vikunja — versions < 2.0.0
Vikunja

Weakness classification (CWE)

References

github.com/go-vikunja/vikunja/security/advisories/GHSA-3ccg-x393-96v8 (Exploit, Vendor Advisory)
vikunja.io/changelog/vikunja-v2.0.0-was-released (Release Notes)

Frequently asked questions

What is CVE-2026-27575?: CVE-2026-27575 is a critical-severity vulnerability in Go-Vikunja Vikunja, classified under Weak Password Requirements. CVSS score: 9.1/10. Published 2026-02-25.
How severe is CVE-2026-27575?: Critical severity. CVSS v3 base score is 9.1 out of 10.