Medium 5.4Published Apr 10, 2026

CVE-2026-35600Vikunja has HTML Injection via Task Titles in Overdue Email Notifications

Updated under an hour ago (Oct 27, 2026, 1:10 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for go-vikunja vikunja

Exploited in the last 30 days

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.

CVSS: 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Apr 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

go-vikunja vikunja go_vikunja:vikunja (from the name)	before 2.3.0	CNA record
vikunja vikunja vikunja:vikunja	before 2.3.0	NVD

References

References

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-45q4-x4r9-8fqj	x-refsource-confirm, exploit, vendor-advisory
https://github.com/go-vikunja/vikunja/pull/2580	x-refsource-misc, issue-tracking
https://github.com/go-vikunja/vikunja/commit/0f3730d045f20e261e3cdfc6d93c325653395b64	x-refsource-misc, patch
https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.