Vulnerability · Published Feb 25, 2026 · Assigned by GitHub_M
CVE-2026-27575Vijkunja has Weak Password Policy Combined with Persistent Sessions After Password Change
Critical 9.1
In plain English
A critical-severity security flaw in vikunja from go-vikunja. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | code.vikunja.io/api | no fix listed | GHSA-3ccg-x393-96v8 |
| Go | code.vikunja.io/api | no fix listed | GO-2026-4551 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| go-vikunja | vikunja | < 2.0.0 |
Weakness: CWE-521, CWE-613 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
References
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-3ccg-x393-96v8 x_refsource_CONFIRM
- https://vikunja.io/changelog/vikunja-v2.0.0-was-released x_refsource_MISC