CVE-2026-27575 Vijkunja has Weak Password Policy Combined with Persistent Sessions After Password Change
Attackers can maintain persistent access after password resets due to weak password policies and session invalidation failures in Vikunja.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-27575?
CVE-2026-27575 is a critical vulnerability in go-vikunja vikunja, published on 25 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-27575?
3 open source packages ship an affected version, including code.vikunja.io/api. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
code.vikunja.io/api Go | All versions | None |
code.vikunja.io/api Go | All versions to 0.24.6 | None |
code.vikunja.io/api Go | All versions to 0.24.6 | None |
Products include Vikunja Vikunja.
How do I fix CVE-2026-27575?
Upgrade to a fixed version.
Is CVE-2026-27575 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27575 exists.
Other vulnerabilities in go-vikunja vikunja
- CVE-2026-28268 Vikunja Vulnerable to Account Takeover via Password Reset Token Reuse
- CVE-2026-25935 Vikunja Affected by XSS Via Task Preview
- CVE-2026-35595 Vikunja Affected by Privilege Escalation via Project Reparenting
- CVE-2026-33316 Vikunja’s Improper Access Control Enables Bypass of Administrator-Imposed Account Disablement
- CVE-2026-33678 Vikunja has IDOR in Task Attachment ReadOne Allows Cross-Project File Access and Deletion
Sources
Also known as GHSA-3ccg-x393-96v8, GO-2026-4551.