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CVE-2026-18369VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat Certificate System 10.4.4 security and bug fix update for RHEL 8

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2026-18369· Medium 5.8

Not known to be exploited · CVSS 5.8 Medium.

Data as of 5 Nov 2026, 22:49 UTC

CVSS 3.1 base score
5.8Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.15.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Certificate System 10.4 EUS for RHEL-8redhat-pki:10Affected–Fixed in–
Red Hat Certificate System 10redhat-pki:10/redhat-pkiAffected–Fixed in–
Red Hat Certificate System 11redhat-pkiAffected–Fixed in–
Red Hat Certificate System 9pki-coreAffected–Fixed in–
Red Hat Certificate System 9redhat-pkiAffected–Fixed in–
Red Hat Enterprise Linux 10dogtag-pkiAffected–Fixed in–

Description

Red Hat Certificate System (RHCS) is a complete implementation of an enterprise software system designed to manage enterprise Public Key Infrastructure (PKI) deployments. Security fixes: - CVE-2026-18369 - ACME HTTP-01 validation SSRF via IP literal identifiers and unvalidated redirects Users of RHCS are advised to upgrade to these updated packages.

References

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