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 two security-relevant
bugs:



*
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 the email subject.




*
Placeholders in subjects and plain text bodies of emails were
wrongfully evaluated twice. Therefore, if the first evaluation of a
placeholder again contains a placeholder, this second placeholder was
rendered. This allows the rendering of placeholders controlled by the
ticket buyer, and therefore the exploitation of the first issue as a
ticket buyer. Luckily, the only buyer-controlled placeholder available
in pretix by default (that is not validated in a way that prevents the
issue) is {invoice_company}, which is very unusual (but not
impossible) to be contained in an email subject template. In addition
to broadening the attack surface of the first issue, this could
theoretically also leak information about an order to one of the
attendees within that order. However, we also consider this scenario
very unlikely under typical conditions.


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.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

Limit backend access to trusted users, do not use user-controlled variables in the email template subjects.

History

Tue, 17 Feb 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 16 Feb 2026 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Pretix
Pretix pretix
Vendors & Products Pretix
Pretix pretix

Mon, 16 Feb 2026 10:45:00 +0000

Type Values Removed Values Added
Description 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 two security-relevant bugs: * 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 the email subject. * Placeholders in subjects and plain text bodies of emails were wrongfully evaluated twice. Therefore, if the first evaluation of a placeholder again contains a placeholder, this second placeholder was rendered. This allows the rendering of placeholders controlled by the ticket buyer, and therefore the exploitation of the first issue as a ticket buyer. Luckily, the only buyer-controlled placeholder available in pretix by default (that is not validated in a way that prevents the issue) is {invoice_company}, which is very unusual (but not impossible) to be contained in an email subject template. In addition to broadening the attack surface of the first issue, this could theoretically also leak information about an order to one of the attendees within that order. However, we also consider this scenario very unlikely under typical conditions. 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.
Title Unsafe variable evaluation in email templates
Weaknesses CWE-627
References
Metrics cvssV4_0

{'score': 7.5, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/RE:L/U:Red'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: rami.io

Published:

Updated: 2026-02-17T17:06:39.418Z

Reserved: 2026-02-12T17:02:46.966Z

Link: CVE-2026-2415

cve-icon Vulnrichment

Updated: 2026-02-17T16:43:13.482Z

cve-icon NVD

Status : Received

Published: 2026-02-16T11:15:56.047

Modified: 2026-02-16T11:15:56.047

Link: CVE-2026-2415

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-16T12:00:54Z

Weaknesses