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Pimcore ENV Variables and Cookie Informations are exposed in http_error_log

High severity GitHub Reviewed Published Jan 15, 2026 in pimcore/pimcore • Updated Jan 15, 2026

Package

composer pimcore/pimcore (Composer)

Affected versions

>= 12.0.0-RC1, <= 12.3
<= 11.5.13

Patched versions

12.3.1
11.5.14

Description

Summary

The http_error_log file stores the $_COOKIE and $_SERVER variables, which means sensitive information such as database passwords, cookie session data, and other details can be accessed or recovered through the Pimcore backend.

Details

It’s better to remove both lines, as this information makes little sense in this context anyway.

https://github.com/pimcore/pimcore/blob/12.x/bundles/SeoBundle/src/EventListener/ResponseExceptionListener.php#L92
https://github.com/pimcore/pimcore/blob/12.x/bundles/SeoBundle/src/EventListener/ResponseExceptionListener.php#L93

PoC

In the Pimcore backend, navigate to "Search Engine Optimization" and click on "HTTP Errors." Double-click on an entry to view its details. Here, you may find sensitive data exposed.

Impact

Pimcore backend users can access sensitive environment variables, potentially exposing critical information.

References

@astapc astapc published to pimcore/pimcore Jan 15, 2026
Published by the National Vulnerability Database Jan 15, 2026
Published to the GitHub Advisory Database Jan 15, 2026
Reviewed Jan 15, 2026
Last updated Jan 15, 2026

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
Low

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(0th percentile)

Weaknesses

Insertion of Sensitive Information into Log File

The product writes sensitive information to a log file. Learn more on MITRE.

CVE ID

CVE-2026-23493

GHSA ID

GHSA-q433-j342-rp9h

Source code

Credits

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