CVE-2026-35600: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in go-vikunja vikunja
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.
AI Analysis
Technical Summary
CVE-2026-35600 is a cross-site scripting vulnerability in the open-source task management platform Vikunja (go-vikunja). Before version 2.3.0, task titles included in overdue email notifications are embedded directly into Markdown link syntax without escaping special characters. The Markdown renderer (goldmark) combined with the sanitizer (bluemonday), which permits <a> and <img> tags, allows injected Markdown to produce phishing links and tracking pixels. This vulnerability enables attackers to manipulate notification emails to include malicious content. The issue is resolved in Vikunja 2.3.0.
Potential Impact
The vulnerability allows attackers with limited privileges (PR:L) to inject malicious Markdown into overdue email notifications, potentially leading to phishing attacks and user tracking via embedded links and images. The impact includes limited confidentiality and integrity loss but no availability impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
This vulnerability is fixed in Vikunja version 2.3.0. Users should upgrade to version 2.3.0 or later to remediate this issue. Patch status is not explicitly confirmed beyond this fix version; therefore, verify with the vendor advisory for the latest remediation guidance.
CVE-2026-35600: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in go-vikunja vikunja
Description
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-35600 is a cross-site scripting vulnerability in the open-source task management platform Vikunja (go-vikunja). Before version 2.3.0, task titles included in overdue email notifications are embedded directly into Markdown link syntax without escaping special characters. The Markdown renderer (goldmark) combined with the sanitizer (bluemonday), which permits <a> and <img> tags, allows injected Markdown to produce phishing links and tracking pixels. This vulnerability enables attackers to manipulate notification emails to include malicious content. The issue is resolved in Vikunja 2.3.0.
Potential Impact
The vulnerability allows attackers with limited privileges (PR:L) to inject malicious Markdown into overdue email notifications, potentially leading to phishing attacks and user tracking via embedded links and images. The impact includes limited confidentiality and integrity loss but no availability impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
This vulnerability is fixed in Vikunja version 2.3.0. Users should upgrade to version 2.3.0 or later to remediate this issue. Patch status is not explicitly confirmed beyond this fix version; therefore, verify with the vendor advisory for the latest remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-03T21:25:12.162Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d9d9751cc7ad14da3f8735
Added to database: 4/11/2026, 5:17:41 AM
Last enriched: 4/11/2026, 5:19:43 AM
Last updated: 4/11/2026, 3:07:17 PM
Views: 10
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