CVE-2026-12423
Foreman: unauthenticated information disclosure via provisioning token validation flaw
Description
A flaw was found in Foreman. The Red Hat Satellite /unattended/provision API endpoint is vulnerable to an authentication bypass due to a semantic logic flaw in host_verifier.rb. The application verifies the database state of a provisioning token rather than its actual presence in the incoming HTTP request. Because a host actively undergoing provisioning has an unexpired token in the database, the server's valid_host_token? method evaluates to true, granting access to the kickstart template even if the requester provides no token at all in the URL.
INFO
Published Date :
Oct. 1, 2026, 5:17 p.m.
Last Modified :
Oct. 8, 2026, 1:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-12423
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 53f830b8-0a3f-465b-8143-3b8a9948e749 | ||||
| CVSS 3.1 | HIGH | MITRE-CVE | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Red Hat Satellite to the latest version.
- Apply configuration changes to host_verifier.rb.
- Review and restrict access to the /unattended/provision API.
- Monitor API access logs for suspicious activity.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-12423.
| URL | Resource |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:74503 | Vendor Advisory |
| https://access.redhat.com/errata/RHSA-2026:74504 | Vendor Advisory |
| https://access.redhat.com/errata/RHSA-2026:74505 | Vendor Advisory |
| https://access.redhat.com/errata/RHSA-2026:74506 | Vendor Advisory |
| https://access.redhat.com/security/cve/CVE-2026-12423 | Vendor Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2488956 | Issue Tracking Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2026/10/07/10 | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-12423 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-12423
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-12423 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-12423 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Oct. 08, 2026
Action Type Old Value New Value Added CPE Configuration AND OR *cpe:2.3:a:redhat:satellite:*:*:*:*:*:*:*:* versions from (including) 6.16 up to (excluding) 6.16.4 OR cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:redhat:satellite:*:*:*:*:*:*:*:* versions from (including) 6.17 up to (excluding) 6.17.12 OR cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:redhat:satellite:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 6.19.5 OR cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:theforeman:foreman:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:redhat:satellite:*:*:*:*:*:*:*:* versions from (including) 6.18 up to (excluding) 6.18.10 OR cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:redhat:satellite:6.0:*:*:*:*:*:*:* Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:74503 Types: Vendor Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:74504 Types: Vendor Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:74505 Types: Vendor Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:74506 Types: Vendor Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-12423 Types: Vendor Advisory Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/10/07/10 Types: Third Party Advisory Added Reference Type Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2488956 Types: Issue Tracking, Vendor Advisory -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Oct. 07, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/10/07/10 -
CVE Modified by [email protected]
Oct. 02, 2026
Action Type Old Value New Value Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/12xxx/CVE-2026-12423.json">CVE-2026-12423</a> Added Reference https://access.redhat.com/errata/RHSA-2026:74505 -
CVE Modified by [email protected]
Oct. 02, 2026
Action Type Old Value New Value Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/12xxx/CVE-2026-12423.json">CVE-2026-12423</a> Added Reference https://access.redhat.com/errata/RHSA-2026:74504 Added Reference https://access.redhat.com/errata/RHSA-2026:74506 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 01, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-12423', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-10-01T17:36:22.572043Z'} -
New CVE Received by [email protected]
Oct. 01, 2026
Action Type Old Value New Value Added Description A flaw was found in Foreman. The Red Hat Satellite /unattended/provision API endpoint is vulnerable to an authentication bypass due to a semantic logic flaw in host_verifier.rb. The application verifies the database state of a provisioning token rather than its actual presence in the incoming HTTP request. Because a host actively undergoing provisioning has an unexpired token in the database, the server's valid_host_token? method evaluates to true, granting access to the kickstart template even if the requester provides no token at all in the URL. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-306 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/12xxx/CVE-2026-12423.json">CVE-2026-12423</a> Added Reference https://access.redhat.com/errata/RHSA-2026:74503 Added Reference https://access.redhat.com/security/cve/CVE-2026-12423 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2488956