Red Hat Security Advisory

RHSA-2026:52826

ignition security update

Released 2026-08-10 · Red Hat rating Important · View on Red Hat →

Fixed in

Red Hat Enterprise Linux AppStream EUS (v.9.6) ignition-2.21.0-7.el9_6, ignition-edge-2.21.0-7.el9_6, ignition-grub-2.21.0-7.el9_6 +1

TI-2026-28703 CVE-2026-39821 · GHSA-w2q5-6q6x-x959

MEDIUM 47

The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label.

CVSS 3.1CRITICAL 9.6 Network Low privileges No interaction EPSS 0.01834 Published 2026-05-22 Partial fix · 1.25.13, 1.26.6 +2 CWE-1289