CVE-2026-2452

What it is

Emails sent by pretix can utilize placeholders that will be filled with customer data. For example, when {name} is used in an email template, it will be replaced with the buyer's name for the final email. This mechanism contained a security-relevant bug: It was possible to exfiltrate information about the pretix system through specially crafted placeholder names such as {{event.__init__.__code__.co_filename}}. This way, an attacker with the ability to control email templates (usually every user of the pretix backend) could retrieve sensitive information from the system configuration, including even database passwords or API keys. pretix does include mechanisms to prevent the usage of such malicious placeholders, however due to a mistake in the code, they were not fully effective for this plugin. Out of caution, we recommend that you rotate all passwords and API keys contained in your pretix.cfg https://docs.pretix.eu/self-hosting/config/  file.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data exposure, data tampering, service disruption.

Exploit odds

0.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-02-16 11:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 10:30 UTC Last updatedMost recent change to the record

Details

Published

2026-02-16 11:15 UTC

Last modified

2026-06-17 10:30 UTC

Exploit probability

0.3% · EPSS, next 30 days

Weakness

CWE-627

Record status

Analyzed

Affected

• Pretix Newsletters < 1.6.3
• Pretix Newsletters 2.0.0
• Pretix < 2026.1.1

Attack profile CVSS 4.0 · 7.5

Attack vector

Network

Complexity

High

Attack requirements

None

Privileges needed

Low

User interaction

None

Confidentiality

High

Integrity

High

Availability

High