What’s Vulnerable › Vulnerabilities

CVE-2026-115507: Vikunja 2.2.0 before 2.7.1 HTML Injection via Notification Email Header

• Severity: low (CVSS 3.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-22 · updated 2026-10-23
• Weakness: CWE-79

Description

Vikunja 2.2.0 before 2.7.1 contains an HTML injection vulnerability in CreateConversationalHeader in pkg/notifications/mail.go that interpolates display names and task and project titles raw into email anchors. Authenticated users can craft titles or display names that close the anchor and inject phishing links into task-comment and task-mention notification emails sent to project members.

Affected products

• go-vikunja vikunja: from 2.2.0 before 2.7.1 — fixed in 2.7.1

How to fix

Upgrade to a fixed version: go-vikunja vikunja 2.7.1. Check the vendor advisory for mitigations.

References

• https://github.com/go-vikunja/vikunja
• https://github.com/go-vikunja/vikunja/blob/v2.7.0/pkg/notifications/mail.go#L132-L148
• https://github.com/go-vikunja/vikunja/commit/18ff05932632c65dbc90a88118597989c6af4bf9
• https://github.com/go-vikunja/vikunja/releases/tag/v2.7.1
• https://github.com/go-vikunja/vikunja/security/advisories/GHSA-rp33-8f2m-hm6j
• https://www.vulncheck.com/advisories/vikunja-2.2.0-before-2.7.1-html-injection-via-notification-email-header

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