CVE-2026-12112: A flaw was found in the foreman-mcp-server

Routine

HIGH 7.8WATCHLISTDOWNGRADEMITIGATE

CVE-2026-12112 is a high-severity flaw (CVSS 7.8) affecting satellite, foreman. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in the foreman-mcp-server. 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

Why this priority

High severity
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-287
Published	2026-06-23
Last modified	2026-10-25

Publisher (CNA): Red Hat, Inc. · Vendor: redhat · theforeman

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-23 21:16 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

redhat satellite DOWNGRADE

Affected: 6.19

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.19

1. Check installed version

apt-cache policy satellite || rpm -q satellite || satellite --version

2. No fixed release: DOWNGRADE to a release before 6.19 (Debian / Ubuntu)

apt-cache madison satellite sudo apt install satellite=<VERSION_BEFORE_6.19> sudo apt-mark hold satellite

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list satellite sudo dnf downgrade satellite-<VERSION_BEFORE_6.19> sudo dnf versionlock add satellite

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

theforeman foreman MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy foreman || rpm -q foreman || foreman --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-12112?

satellite: downgrade or apply the listed mitigation; foreman: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-12112 being exploited?

CVE-2026-12112 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-12112 affect?

CVE-2026-12112 affects satellite, foreman. Severity is high (CVSS 7.8). A flaw was found in the foreman-mcp-server. 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 trus

How urgent is CVE-2026-12112?

Priority 35/100. High severity; On your watchlist

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CVE-2026-13316 MEDIUM 4.4 UPGRADE MITIGATE A flaw has been found in foreman when HTTP parameters are modified in http_proxies_controller and http_proxy f

References

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