---
title: "CVE-2026-12423: Foreman - Authentication Bypass"
description: "Foreman contains an authentication bypass caused by a semantic logic flaw in host_verifier.rb in the /unattended/provision API endpoint, letting attackers access kickstart templates without providing a token, exploit requires crafted request without token."
url: https://panop.io/threat-heartbeat/CVE-2026-12423/
---

# CVE-2026-12423 Foreman - Authentication Bypass

Foreman contains an authentication bypass caused by a semantic logic flaw in host\_verifier.rb in the /unattended/provision API endpoint, letting attackers access kickstart templates without providing a token, exploit requires crafted request without token.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.36% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-12423)

## Details

Type

Authentication Bypass

Impact

Broken Authentication

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Published

1 October 2026

Updated

15 October 2026

Weakness

[CWE-306](https://cwe.mitre.org/data/definitions/306.html)

## Vendor fix

Update to the latest version containing the fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-12423](https://nvd.nist.gov/vuln/detail/CVE-2026-12423)
- [https://access.redhat.com/errata/RHSA-2026:74503](https://access.redhat.com/errata/RHSA-2026:74503)
- [https://access.redhat.com/security/cve/CVE-2026-12423](https://access.redhat.com/security/cve/CVE-2026-12423)
- [https://bugzilla.redhat.com/show\_bug.cgi?id=2488956](https://bugzilla.redhat.com/show_bug.cgi?id=2488956)
- [https://access.redhat.com/errata/RHSA-2026:74504](https://access.redhat.com/errata/RHSA-2026:74504)
- [https://access.redhat.com/errata/RHSA-2026:74506](https://access.redhat.com/errata/RHSA-2026:74506)
- [https://access.redhat.com/errata/RHSA-2026:74505](https://access.redhat.com/errata/RHSA-2026:74505)
- [http://www.openwall.com/lists/oss-security/2026/10/07/10](http://www.openwall.com/lists/oss-security/2026/10/07/10)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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