What is CVE-2026-27116?

CVE-2026-27116 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-02-25.

How severe is CVE-2026-27116?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Go-Vikunja Vikunja

CVE-2026-27116

Vikunja is an open-source self-hosted task management platform. Prior to version 2.0.0, a reflected HTML injection vulnerability exists in the Projects module where the `filter` URL parameter is rendered into the DOM without output encoding when the user clicks "Filter." While `<script>` and `<iframe>` are blocked, `<svg>`, `<a>`, and formatting tags (`<h1>`, `<b>`, `<u>`) render without restriction — enabling SVG-based phishing buttons, external redirect links, and content spoofing within the trusted application origin. Version 2.0.0 fixes this issue.

Vulnerability class: XSS (Cross-Site Scripting)

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

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (18.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

Go-Vikunja Vikunja — versions < 2.0.0
Vikunja

Weakness classification (CWE)

References

github.com/go-vikunja/vikunja/security/advisories/GHSA-4qgr-4h56-8895 (Exploit, Vendor Advisory)
vikunja.io/changelog/vikunja-v2.0.0-was-released (Release Notes)

Frequently asked questions

What is CVE-2026-27116?: CVE-2026-27116 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-02-25.
How severe is CVE-2026-27116?: Medium severity. CVSS v3 base score is 6.1 out of 10.