XSS in Go-Vikunja Vikunja
CVE-2026-35600
Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, task titles are embedded directly into Markdown link syntax in overdue email notifications without escaping Markdown special characters. When rendered by goldmark and sanitized by bluemonday (which allows <a> and <img> tags), injected Markdown constructs produce phishing links and tracking pixels in legitimate notification emails. This vulnerability is fixed in 2.3.0.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.4% 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 < 2.3.0
- Vikunja
Weakness classification (CWE)
References
- github.com/go-vikunja/vikunja/security/advisories/GHSA-45q4-x4r9-8fqj (Exploit, Vendor Advisory)
- github.com/go-vikunja/vikunja/pull/2580 (Issue Tracking)
- github.com/go-vikunja/vikunja/commit/0f3730d045f20e261e3cdfc6d93c325653395b64 (Patch)
- github.com/go-vikunja/vikunja/releases/tag/v2.3.0 (Release Notes)
Frequently asked questions
- What is CVE-2026-35600?
- CVE-2026-35600 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-10.
- How severe is CVE-2026-35600?
- Medium severity. CVSS v3 base score is 5.4 out of 10.