CVE-2026-41426: pretalx is a conference planning tool

Q: How do I fix CVE-2026-41426?

pretalx: upgrade to 2026.1.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-41426 being exploited?

CVE-2026-41426 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-41426 affect?

CVE-2026-41426 affects pretalx. Severity is medium (CVSS 6.1). 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-

Q: How urgent is CVE-2026-41426?

Priority 22/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2026-41426 is a medium-severity flaw (CVSS 6.1) affecting pretalx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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, a

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 95%)
CISA exploited list	No
Weakness	CWE-79, CWE-116
Published	2026-04-24
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: pretalx

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-24 20:16 UTCPublished CVE record published
2026-06-17 10:46 UTCUpdated Record last modified

pretalx pretalx UPGRADE

Affected: < 2026.1.0

Fixed in: 2026.1.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pretalx || rpm -q pretalx || pretalx --version

2. UPGRADE to 2026.1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pretalx

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pretalx

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-41426?

pretalx: upgrade to 2026.1.0. Exact commands for each OS are on this page.

Is CVE-2026-41426 being exploited?

CVE-2026-41426 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-41426 affect?

CVE-2026-41426 affects pretalx. Severity is medium (CVSS 6.1). 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-

How urgent is CVE-2026-41426?

Priority 22/100. No elevated risk signals yet.

Related CVEs

CVE-2026-41241 HIGH 8.7 UPGRADE pretalx is a conference planning tool

References

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