---
id: CVE-2026-115507
title: Vikunja 2.2.0 before 2.7.1 HTML Injection via Notification Email Header
summary: >-
  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 cr…
severity: low
cvss: 3.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: go-vikunja
product: vikunja
affected:
  - vikunja >= 2.2.0 < 2.7.1
published: '2026-10-22'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T19:14:07.157Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-115507'
references:
  - url: >-
      https://github.com/go-vikunja/vikunja/security/advisories/GHSA-rp33-8f2m-hm6j
    label: GitHub Security Advisory (GHSA-rp33-8f2m-hm6j)
  - url: >-
      https://github.com/go-vikunja/vikunja/commit/18ff05932632c65dbc90a88118597989c6af4bf9
  - url: >-
      https://github.com/go-vikunja/vikunja/blob/v2.7.0/pkg/notifications/mail.go#L132-L148
  - url: 'https://github.com/go-vikunja/vikunja/releases/tag/v2.7.1'
    label: vikunja v2.7.1 Release Notes
  - url: 'https://github.com/go-vikunja/vikunja'
  - url: >-
      https://www.vulncheck.com/advisories/vikunja-2.2.0-before-2.7.1-html-injection-via-notification-email-header
    label: >-
      VulnCheck Advisory: Vikunja 2.2.0 before 2.7.1 HTML Injection via
      Notification Email Header
tags:
  - cve.org
ingestedAt: '2026-10-22T22:00:50.412Z'
---

## Overview

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

- `vikunja >= 2.2.0 < 2.7.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.