Cyber Resilience

CVE-2026-2452

Pretix Newsletters ≤ 1.6.3

Published
16 February 2026
Modified
12 March 2026
Patch / advisory
View advisory
CVSS Score v4 7.5
Click a component to see what it means
Raw vectorCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:L/U:Red
EPSS Score 0.0026 17th percentile
Risk Priority 29 floored blend · peak EPSS

Summary

CVE-2026-2452 is a high-severity Dynamic Variable Evaluation (CWE-627) vulnerability in Pretix Newsletters. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 17th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) and SA-8 (Security and Privacy Engineering Principles) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

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…

more

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.

CWE(s)
CWE-627

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1212 Exploitation for Credential Access Credential Access
Adversaries may exploit software vulnerabilities in an attempt to collect credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-2415Same product: Pretix Pretix
CVE-2026-2451Same product: Pretix Pretix
CVE-2024-27447Same product: Pretix Pretix
CVE-2025-13742Same product: Pretix Pretix
CVE-2024-8113Same product: Pretix Pretix
CVE-2026-5600Same product: Pretix Pretix
CVE-2024-8953Shared CWE-627
CVE-2023-31032Shared CWE-627

Affected Assets

pretix
newsletters
2.0.0 · ≤ 1.6.3
pretix
pretix
4.16.0 — 2026.1.1

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match

Input validation directly stops untrusted strings from being used as variable or function names in dynamic evaluation.

SA-8 Security and Privacy Engineering Principles partial match

Secure engineering principles include avoiding or strictly controlling dynamic variable resolution from user input.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly prevent unsafe dynamic variable evaluation via input validation and code review.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect dynamic evaluation flaws but does not prevent them by itself.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle mandates input validation and variable handling rules that reduce dynamic evaluation risks.

A.8.26 Application security requirements partial match
prevents

Application security requirements can specify restrictions on dynamic variable or function evaluation.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles discourage unsafe dynamic evaluation constructs.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly prohibit or constrain dynamic variable evaluation to prevent arbitrary access.

References