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PatchSiren cyber security CVE debrief

CVE-2026-12112 Red Hat CVE debrief

A session management vulnerability in the MCP Server allows unauthenticated attackers to hijack active administrative sessions due to an improper cache of authenticated client connections, by trusting a non-secret session ID without re-validating authentication tokens and by logging all newly created session IDs to standard logs. This issue can result in privilege escalation and infrastructure-wide code execution. The vulnerability has a CVSS score of 7.8 and is classified as HIGH. The CVE was published on June 23, 2026, and last modified on June 25, 2026.

Vendor
Red Hat
Product
Red Hat Satellite 6.19
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-23
Original CVE updated
2026-07-16
Advisory published
2026-06-23
Advisory updated
2026-07-16

Who should care

Administrators and users of the foreman-mcp-server are advised to take immediate action to mitigate this vulnerability. This vulnerability can be exploited by unauthenticated attackers, which makes it a critical issue to address. Red Hat has provided references and errata related to this CVE.

Technical summary

The vulnerability is caused by the improper caching of authenticated client connections in the MCP Server, which allows unauthenticated attackers to hijack active administrative sessions. The issue arises from trusting a non-secret session ID without re-validating authentication tokens and logging all newly created session IDs to standard logs. This can lead to privilege escalation and infrastructure-wide code execution. The CVSS vector for this vulnerability is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Defensive priority

High priority should be given to patching and mitigating this vulnerability due to its high CVSS score and potential for exploitation. Administrators should review and apply the provided patches and errata from Red Hat.

Recommended defensive actions

  • Apply patches and errata provided by Red Hat to fix the session management vulnerability.
  • Review and update the MCP Server configuration to ensure proper caching of authenticated client connections.
  • Implement additional security measures to prevent session hijacking, such as re-validating authentication tokens.
  • Monitor logs for newly created session IDs and restrict access to sensitive information.
  • Consider implementing compensating controls, such as Web Application Firewalls (WAFs), to detect and prevent exploitation attempts.

Evidence notes

The CVE-2026-12112 record was obtained from the NVD database, which provides detailed information about the vulnerability, including its CVSS score, vector, and references. Red Hat has provided errata and references related to this CVE, which can be used to mitigate the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-12112 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-12112

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-12112 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-12112

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.