Red Hat Security AdvisoryRHSA-2026:39798
python3.9 security, bug fix, and enhancement update
Released 2026-07-15 · Red Hat rating Important · View on Red Hat →
Fixed in
- Red Hat Enterprise Linux AppStream (v. 9) python-unversioned-command-3.9.25-7.el9_8.2, python3-devel-3.9.25-7.el9_8.2, python3-tkinter-3.9.25-7.el9_8.2
- Red Hat Enterprise Linux BaseOS (v. 9) python3-3.9.25-7.el9_8.2, python3-libs-3.9.25-7.el9_8.2, python3.9-3.9.25-7.el9_8.2
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) python3-3.9.25-7.el9_8.2, python3-debug-3.9.25-7.el9_8.2, python3-idle-3.9.25-7.el9_8.2 +2
Fixes 1 record
Priority MEDIUM 45
The incremental HTML parser (html.parser.HTMLParser) allows for CPU denial-of-service through repeated unterminated markup declarations when processing uncontrolled data.
CVSS 4.0HIGH 8.7· Network · No auth · No interaction · EPSS 0.00637 · Published 2026-07-09 · Partial fix · 3.10.21, 3.11.16 +4 CWE-400
