CVE-2026-23493: Pimcore ENV Variables and Cookie Informations are exposed in http_error_log
Summary The httperrorlog 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.
Other sources
Pimcore is an Open Source Data & Experience Management Platform. Prior to 12.3.1 and 11.5.14, the httperrorlog 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. This vulnerability is fixed in 12.3.1 and 11.5.14.
— MITRE
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-23493?
CVE-2026-23493 is classified as a high severity vulnerability due to the potential exposure of sensitive environment variables and cookie information.
What information is exposed by CVE-2026-23493?
CVE-2026-23493 exposes sensitive data such as database passwords and cookie session data through the http_error_log file.
How do I fix CVE-2026-23493?
To fix CVE-2026-23493, upgrade Pimcore to version 11.5.14 or 12.3.1 or later.
Which versions of Pimcore are affected by CVE-2026-23493?
CVE-2026-23493 affects Pimcore versions prior to 11.5.14 and 12.3.1.
What are the implications of CVE-2026-23493 for data security?
The implications of CVE-2026-23493 for data security include the risk of unauthorized access to sensitive information, leading to potential data breaches.