CVE-2026-41426: Pretalx

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

pretalx is a conference planning tool. Prior to 2026.1.0, an unauthenticated attacker can send arbitrary HTML-rendered emails from a pretalx instance's configured sender address by embedding malformed HTML or markdown link syntax in a user-controlled template placeholder such as the account display name. The most direct vector is the password-reset flow: the attacker registers an account with a malicious name, enters the victim's email address, and triggers a password reset. The resulting email is delivered from the event's legitimate sender address and passes SPF/DKIM/DMARC validation, making it a ready-made phishing vector. This vulnerability is fixed in 2026.1.0.

Affected products

• Pretalx Pretalx: before 2026.1.0 (fixed in 2026.1.0)

Published 2026-04-24. Last modified 2026-06-17.