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.
CVE-2026-23493 has a CVSS score of 8.6 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (12.3.1, 11.5.14); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
Remediation advice
pimcore/pimcore to 12.3.1 or later; pimcore/pimcore to 11.5.14 or later
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
Frequently Asked Questions
- What is CVE-2026-23493? CVE-2026-23493 is a high-severity security vulnerability in pimcore/pimcore (composer), affecting versions >= 12.0.0-RC1, <= 12.3. It is fixed in 12.3.1, 11.5.14.
- How severe is CVE-2026-23493? CVE-2026-23493 has a CVSS score of 8.6 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of pimcore/pimcore are affected by CVE-2026-23493? pimcore/pimcore (composer) versions >= 12.0.0-RC1, <= 12.3 is affected.
- Is there a fix for CVE-2026-23493? Yes. CVE-2026-23493 is fixed in 12.3.1, 11.5.14. Upgrade to this version or later.
- Is CVE-2026-23493 exploitable, and should I be worried? Whether CVE-2026-23493 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2026-23493 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2026-23493?
- Upgrade
pimcore/pimcoreto 12.3.1 or later - Upgrade
pimcore/pimcoreto 11.5.14 or later
- Upgrade