RHSA-2026:59546HighCVSS 8.8

Red Hat Security Advisory: ignition security update

Published
August 25, 2026
Last Modified
August 27, 2026

🔗 CVE IDs covered (2)

CVE-2026-33810 →CVE-2026-39821 →

📋 Description

CVE-2026-33810 — crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application CVE-2026-39821 — golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing

🎯 Affected products26

  • Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-0:2.21.0-2.el10_0.3.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-0:2.21.0-2.el10_0.3.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-0:2.21.0-2.el10_0.3.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-0:2.21.0-2.el10_0.3.src as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-0:2.21.0-2.el10_0.3.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-debuginfo-0:2.21.0-2.el10_0.3.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-debuginfo-0:2.21.0-2.el10_0.3.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-debuginfo-0:2.21.0-2.el10_0.3.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-debuginfo-0:2.21.0-2.el10_0.3.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-debugsource-0:2.21.0-2.el10_0.3.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-debugsource-0:2.21.0-2.el10_0.3.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-debugsource-0:2.21.0-2.el10_0.3.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-debugsource-0:2.21.0-2.el10_0.3.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-edge-0:2.21.0-2.el10_0.3.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-edge-0:2.21.0-2.el10_0.3.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-edge-0:2.21.0-2.el10_0.3.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-edge-0:2.21.0-2.el10_0.3.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-validate-0:2.21.0-2.el10_0.3.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-validate-0:2.21.0-2.el10_0.3.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-validate-0:2.21.0-2.el10_0.3.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-validate-0:2.21.0-2.el10_0.3.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-validate-debuginfo-0:2.21.0-2.el10_0.3.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-validate-debuginfo-0:2.21.0-2.el10_0.3.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-validate-debuginfo-0:2.21.0-2.el10_0.3.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • ignition-validate-debuginfo-0:2.21.0-2.el10_0.3.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: Upgrade to a fixed golang.org/x/net release that includes the idna correction, via updated golang or dependent package rebuilds.

🔗 References (5)