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

Fixed packages 31

Vulnerabilities 1

• Medium 5.8
  CVE-2026-18369

  Dogtag-pki: pki-core: redhat-pki: pki: acme http-01 validation ssrf via ip literal identifiers and unvalidated redirects

  A flaw was found in Dogtag PKI's ACME responder where the HTTP-01 challenge validator accepts IP address literals as dns identifiers and follows HTTP redirects without validating that the target is a public address. An unauthenticated ACME account holder can …

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu
  Jul 30, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#moderate
• article
  https://issues.redhat.com/browse/DOGTAG-4629
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_67110.json
• report
  https://access.redhat.com/security/cve/CVE-2026-18369
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2509234
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-18369
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-18369