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Fencer Vulns
high 7.5

CVE-2026-12423 json

Foreman: unauthenticated information disclosure via provisioning token validation flaw

published 2026-10-01 38 d ago modified 2026-11-02 6 d ago also EUVD-2026-90915

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

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.

Patch / fix

  • Red Hat Red Hat Satellite 6.16 for RHEL 8 0:3.12.0.23-1.el8sat
  • Red Hat Red Hat Satellite 6.16 for RHEL 9 0:3.12.0.23-1.el9sat
  • Red Hat Red Hat Satellite 6.17 for RHEL 9 0:3.14.0.22-1.el9sat
  • Red Hat Red Hat Satellite 6.18 for RHEL 9 0:3.16.0.25-1.el9sat
  • Red Hat Red Hat Satellite 6.19 for RHEL 9 0:3.18.0.14-1.el9sat
  • foreman satellite utils 6.17, satellite capsule 6.17, satellite 6.17 3.14.0.22-1.el9sat
  • satellite satellite utils 6.17, satellite capsule 6.17, satellite 6.17 6.17.12-1.el9sat
  • foreman-cli satellite utils 6.17, satellite 6.17 3.14.0.22-1.el9sat
  • foreman-ec2 satellite 6.17 3.14.0.22-1.el9sat
  • foreman-pcp satellite capsule 6.17, satellite 6.17 3.14.0.22-1.el9sat
  • python-lxml satellite capsule 6.17, satellite 6.17 5.3.1-2.el9pc
  • foreman-ovirt satellite 6.17 3.14.0.22-1.el9sat
  • foreman-redis satellite 6.17 3.14.0.22-1.el9sat

red hat advisories RHSA-2026:74505RHSA-2026:74504RHSA-2026:74506RHSA-2026:74503

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-12423 updated cvss 7.5

foreman: unauthenticated information disclosure via provisioning token validation flaw

  • Red Hat Satellite 6 foreman, foreman-cli, foreman-ec2, foreman-gce, foreman-ovirt, foreman-vmware, +9 more
    affected: workaround, no fix available “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.”
  • Red Hat Satellite 6.16 for RHEL 8 foreman 3.12.0.23-1.el8sat, foreman-cli 3.12.0.23-1.el8sat, foreman-ec2 3.12.0.23-1.el8sat, foreman-pcp 3.12.0.23-1.el8sat, foreman-ovirt 3.12.0.23-1.el8sat, foreman-redis 3.12.0.23-1.el8sat, +8 more Red Hat Satellite 6.16 for RHEL 9 foreman 3.12.0.23-1.el9sat, foreman-cli 3.12.0.23-1.el9sat, foreman-ec2 3.12.0.23-1.el9sat, foreman-pcp 3.12.0.23-1.el9sat, foreman-ovirt 3.12.0.23-1.el9sat, foreman-redis 3.12.0.23-1.el9sat, +8 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2026:74506
  • Red Hat Satellite 6.17 for RHEL 9 foreman 3.14.0.22-1.el9sat, foreman-cli 3.14.0.22-1.el9sat, foreman-ec2 3.14.0.22-1.el9sat, foreman-pcp 3.14.0.22-1.el9sat, foreman-ovirt 3.14.0.22-1.el9sat, foreman-redis 3.14.0.22-1.el9sat, +8 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2026:74505
  • Red Hat Satellite 6.18 for RHEL 9 foreman 3.16.0.25-1.el9sat
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2026:74504
  • Red Hat Satellite 6.19 for RHEL 9 foreman 3.18.0.14-1.el9sat, foreman-cli 3.18.0.14-1.el9sat, foreman-ec2 3.18.0.14-1.el9sat, foreman-pcp 3.18.0.14-1.el9sat, foreman-redis 3.18.0.14-1.el9sat, foreman-vmware 3.18.0.14-1.el9sat, +7 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2026:74503
  • Red Hat Satellite 6.16 for RHEL 8 python-lxml 4.9.2-5.el8pc, satellite 6.16.14-1.el8sat, python-sqlparse 0.6.0-1.el8pc, python3.11-lxml 4.9.2-5.el8pc, python-dynaconf 3.2.13-1.el8pc, satellite-cli 6.16.14-1.el8sat, +14 more Red Hat Satellite 6.16 for RHEL 9 python-lxml 4.9.2-5.el9pc, satellite 6.16.14-1.el9sat, python-sqlparse 0.6.0-1.el9pc, python3.11-lxml 4.9.2-5.el9pc, python-dynaconf 3.2.13-1.el9pc, satellite-cli 6.16.14-1.el9sat, +14 more Red Hat Satellite 6.17 for RHEL 9 python-lxml 5.3.1-2.el9pc, satellite 6.17.12-1.el9sat, python-sqlparse 0.6.0-1.el9pc, python3.11-lxml 5.3.1-2.el9pc, python-dynaconf 3.2.13-1.el9pc, satellite-cli 6.17.12-1.el9sat, +13 more Red Hat Satellite 6.18 for RHEL 9 satellite 6.18.10-1.el9sat, foreman-cli 3.16.0.25-1.el9sat, foreman-ec2 3.16.0.25-1.el9sat, foreman-pcp 3.16.0.25-1.el9sat, satellite-cli 6.18.10-1.el9sat, rubygem-safemode 1.5.0-2.el9sat, +21 more Red Hat Satellite 6.19 for RHEL 9 satellite 6.19.5-1.el9sat, satellite-cli 6.19.5-1.el9sat, rubygem-safemode 1.5.0-2.el9sat, satellite-common 6.19.5-1.el9sat, python3.12-sqlparse 0.6.0-1.el9pc, satellite-capsule 6.19.5-1.el9sat, +11 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
38 d ago

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

  • Red Hat Red Hat Satellite 6.16 for RHEL 8
  • Red Hat Red Hat Satellite 6.16 for RHEL 9
  • Red Hat Red Hat Satellite 6.17 for RHEL 9
  • Red Hat Red Hat Satellite 6.18 for RHEL 9
  • Red Hat Red Hat Satellite 6.19 for RHEL 9
  • Red Hat Red Hat Satellite 6

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.