What is CVE-2026-41426?

CVE-2026-41426 is a medium-severity vulnerability in Pretalx, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-24.

How severe is CVE-2026-41426?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Pretalx

CVE-2026-41426

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…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (5.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Pretalx — versions < 2026.1.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting
CWE-116 — Improper Encoding or Escaping of Output

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-41426?: CVE-2026-41426 is a medium-severity vulnerability in Pretalx, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-24.
How severe is CVE-2026-41426?: Medium severity. CVSS v3 base score is 6.1 out of 10.