CVE-2026-12423

HIGH
MEDIUM Priority: 0.03 BB Relevance: 75/100
Published: 2026-10-01 Modified: 2026-11-02 First seen: 2026-11-02 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: High
I: None
A: None

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.

References & Advisories (6)

https://access.redhat.com/errata/RHSA-2026:74503
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:74504
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:74505
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:74506
vendor-advisory x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2488956
issue-tracking x_refsource_REDHAT

Bug Bounty Relevance

75 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploitation Probability

0.38%
Raw Score 0.003840
Percentile 32.9%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00384
2026-11-12
0.00384
2026-11-10
0.00384
2026-11-09
0.00384
2026-11-08
0.00384
2026-11-07
0.00384
2026-11-06
0.00384
2026-11-05
0.00384
2026-11-04
0.00384
2026-11-03
0.00384
2026-11-02
0.00384

Intelligence Sources

mitre ref →