Red Hat Satellite 6.18: Improper Authentication
CVE-2026-12112 is a high-severity improper authentication vulnerability in Red Hat Satellite 6.18 from Red Hat, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 0.22% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Red Hat Satellite 6.18 you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Red Hat | Red Hat Satellite 6.18 | Not specified in the record | Not stated |
| Red Hat | Red Hat Satellite 6.19 | Not specified in the record | Not stated |
| Red Hat | Satellite | 6.19 | Not stated |
| Theforeman | Foreman | Not specified in the record | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (redhat.com).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.8 | High | CNA (redhat.com) |
| CVSS 3.1 | 7.8 | High | CNA |
Official description
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 execution.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
How developers prevent this class of flaw
- Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- access.redhat.com/errata/RHSA-2026:28438Third Party Advisory
- access.redhat.com/security/cve/CVE-2026-12112Third Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2488031Third Party Advisory
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12112.jsonThird Party Advisory
Other references
Other vulnerabilities in Red Hat Satellite 6.18
- 7.5 High severity
- 9.3 Critical severity
- 7.5 High severity
- 7.4 High severity
- 6.5 Medium severity
- 8.1 High severity
Recent Improper Authentication vulnerabilities
- 8.4 High severity
- 8.1 High severity
- 9.0 Critical severity
- 9.8 Critical severity
- 7.3 High severity
- 7.3 High severity
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