CVE-2026-23493: Pimcore/pimcore Pimcore ENV Variables And Cookie Vulnerability

HIGH
Advisory Identifier: GHSA-q433-j342-rp9h
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CVSS 8.6
CWE-532
Published
Advisory Summary

CVE-2026-23493 is a HIGH (CVSS 8.6) pimcore env variables and cookie vulnerability (CWE-532: Insertion of Sensitive Information into Log File) affecting Pimcore/pimcore libraries in the Packagist ecosystem. The issue involves pimcore env variables and cookie informations are exposed in http_error_log. Remediation is available by upgrading affected packages to version 12.3.1, 11.5.14.

CVE-2026-23493 at a Glance

CVE Identifier CVE-2026-23493
GHSA Identifier GHSA-q433-j342-rp9h
Severity HIGH
CVSS v3.1 Base Score 8.6
CWE Classification CWE-532: Insertion of Sensitive Information into Log File
Affected Product Pimcore/pimcore
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 8.6

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2026-23493

To remediate this vulnerability, upgrade all affected Pimcore/pimcore dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

pimcore/pimcore fixed: 12.3.1 
Upgrade pimcore/pimcore to 12.3.1
pimcore/pimcore fixed: 11.5.14 
Upgrade pimcore/pimcore to 11.5.14
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for pimcore/pimcore

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-23493, inspect your project dependencies for Pimcore/pimcore:

inspect dependencies for pimcore/pimcore

Analyze the terminal output to locate any version of Pimcore/pimcore in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 12.3.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-532: Insertion of Sensitive Information into Log File, where the product writes sensitive information to a log file. In Pimcore/pimcore, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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 Affected Pimcore/pimcore Versions

2 component(s)
Fixed Versions:
12.3.111.5.14
Product / Package Ecosystem Affected Versions Fixed Version
pimcore/pimcore
 Packagist
≥ 12.0.0-RC1
< 12.3.1
12.3.1
pimcore/pimcore
 Packagist
< 11.5.14
11.5.14

References

GitHub Advisory / Wiki ADVISORY
https://github.com/pimcore/pimcore/security/advisories/GHSA-q433-j342-rp9h
NVD — CVE-2026-23493 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-23493
Pimcore/pimcore Source Repository REPOSITORY
https://github.com/pimcore/pimcore/pull/18918
Security Fix Commit FIX COMMIT
https://github.com/pimcore/pimcore/commit/002ec7d5f84973819236796e5b314703b58e8601
Pimcore/pimcore Source Repository REPOSITORY
https://github.com/pimcore/pimcore
Pimcore/pimcore Release RELEASE
https://github.com/pimcore/pimcore/releases/tag/v11.5.14
Pimcore/pimcore Release RELEASE
https://github.com/pimcore/pimcore/releases/tag/v12.3.1

Frequently Asked Questions

What is CVE-2026-23493?
CVE-2026-23493 is a security vulnerability in Pimcore/pimcore involving Pimcore ENV Variables and Cookie Informations are exposed in http_error_log under CWE-532: Insertion of Sensitive Information into Log File.
Which Pimcore/pimcore versions are affected?
Affected versions include releases prior to 12.3.1, 11.5.14 across affected packages: pimcore/pimcore.
What version fixes CVE-2026-23493?
Upgrading to 12.3.1, 11.5.14 (or the latest patched release for your respective branch) resolves the vulnerability.
Is pimcore/pimcore affected?
Yes, pimcore/pimcore is affected in releases prior to 12.3.1, 11.5.14. Upgrade your dependency to 12.3.1, 11.5.14 or later.
What is the CVSS score of CVE-2026-23493?
CVE-2026-23493 has a CVSS v3.1 base score of 8.6 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L.
What CWE is associated with CVE-2026-23493?
CVE-2026-23493 is classified under CWE-532: Insertion of Sensitive Information into Log File (The product writes sensitive information to a log file.).
How can I check Packagist dependencies for CVE-2026-23493?
Run the dependency tree command: 'inspect dependencies for pimcore/pimcore'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-q433-j342-rp9h",
  "modified" : "2026-01-15T20:17:42Z",
  "published" : "2026-01-15T18:11:46Z",
  "aliases" : [ "CVE-2026-23493" ],
  "summary" : "Pimcore ENV Variables and Cookie Informations are exposed in http_error_log",
  "details" : "### Summary\nThe 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.\n\n### Details\nIt’s better to remove both lines, as this information makes little sense in this context anyway.\n\nhttps://github.com/pimcore/pimcore/blob/12.x/bundles/SeoBundle/src/EventListener/ResponseExceptionListener.php#L92\nhttps://github.com/pimcore/pimcore/blob/12.x/bundles/SeoBundle/src/EventListener/ResponseExceptionListener.php#L93\n\n### PoC\nIn 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.\n\n### Impact\nPimcore backend users can access sensitive environment variables, potentially exposing critical information.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "pimcore/pimcore"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "12.0.0-RC1"
      }, {
        "fixed" : "12.3.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 12.3"
    }
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "pimcore/pimcore"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "11.5.14"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 11.5.13"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/pimcore/pimcore/security/advisories/GHSA-q433-j342-rp9h"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-23493"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pimcore/pimcore/pull/18918"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pimcore/pimcore/commit/002ec7d5f84973819236796e5b314703b58e8601"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/pimcore/pimcore"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pimcore/pimcore/releases/tag/v11.5.14"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pimcore/pimcore/releases/tag/v12.3.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-532" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-01-15T18:11:46Z",
    "nvd_published_at" : "2026-01-15T17:16:08Z"
  }
}