---
title: "CVE-2026-27575: Vijkunja has Weak Password Policy Combined with Persistent Sessions After Password Change"
url: https://erroneo.us/security/cve/CVE-2026-27575/
description: "CVE-2026-27575 (code.vikunja.io/api (Go)): Vikunja is an open-source self-hosted task management platform. Prior to version 2.0.0, the application allows…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-02-25
date_modified: 2026-02-27
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-27575"
kev: false
cvss: 9.1
epss: 0.00461
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-27575: Vijkunja has Weak Password Policy Combined with Persistent Sessions After Password Change

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.5% , percentile 39: FIRST’s model estimates a 0.5% chance of exploitation activity in the next 30 days, higher than 39% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes code.vikunja.io/api (Go) <= 0.24.6, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

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

- Go `code.vikunja.io/api` <= 0.24.6 → fixed: none listed

## Affected products (CVE record)

- go-vikunja vikunja: < 2.0.0

## Severity

- GitHub_M CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`
- GitHub CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.46% probability of exploitation activity in the next 30 days; percentile 39.

## Sources

- [GitHub Advisory GHSA-3ccg-x393-96v8](https://github.com/advisories/GHSA-3ccg-x393-96v8)
- [CVE.org record CVE-2026-27575](https://www.cve.org/CVERecord?id=CVE-2026-27575)
- [NVD entry CVE-2026-27575](https://nvd.nist.gov/vuln/detail/CVE-2026-27575)
- [github.com](https://github.com/go-vikunja/vikunja/security/advisories/GHSA-3ccg-x393-96v8)
- [vikunja.io](https://vikunja.io/changelog/vikunja-v2.0.0-was-released)
- [github.com](https://github.com/go-vikunja/vikunja/commit/89c17d3b23e2a23320ad135b4e8f0a14fdd91bda)

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Source page: https://erroneo.us/security/cve/CVE-2026-27575/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt