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Vulnerabilities

Vulnerability · CVE-2026-2451

Emails sent by pretix can utilize placeholders that will be filled with customer data.

Published Feb 16, 2026 · catalog updated Feb 17, 2026 · Emails sent by pretix

Last checked Nov 12, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-2451. EPSS is 0.31%. Act only if a listed version of Emails sent by pretix is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Emails sent by pretix).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.31%
Remediation
Version ranges on file
Affected products
vendor pretix pretix-doistep 1.0.0 <1.3.2

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor pretix pretix-doistep 1.0.0 <1.3.21.0.0 <1.3.2

How to fix CVE-2026-2451

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-2451. EPSS is 0.31%. Act only if a listed version of Emails sent by pretix is installed.

Which versions are affected?

Compare what you have installed with pretix pretix-doistep 1.0.0 <1.3.2 1.0.0 <1.3.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.31%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 16, 2026 · EUVD

    Detected

    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__.c

  2. Feb 17, 2026 · EUVD

    Updated

    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__.c

Sources

  • CVE.orgVulnerability recordCVE-2026-2451

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-2451

    30-day exploitation probability 0.31%

    first.org
  • EUVDVulnerability recordEUVD-2026-6096

    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 exfilt

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 12, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 12, 2026
  • CVE.orgNov 9, 2026
  • EUVDNov 9, 2026