High [CVE-2026-15308] CPU Denial of Service in HTML parser via repeated unterminated markup declarations
This high-severity Red Hat Linux advisory covers CVE-2026-15308 affecting Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 1.
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Summary
CPU Denial of Service in HTML parser via repeated unterminated markup declarations. Red Hat rates this important (CVSS 7.5).
Weakness: CWE-835. Red Hat lists fixing advisory RHSA-2026:44481 with package discovery/discovery-ui-rhel9:1784821750, python3-12-main-3.12.13-3.5.hum1, python3.12-0:3.12.13-3.el8_10, python3.12-0:3.12.13-3.el9_8.1.
Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 1.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
- discovery/discovery-ui-rhel9:1784821750
- python3-12-main-3.12.13-3.5.hum1
- python3.12-0:3.12.13-3.el8_10
- python3.12-0:3.12.13-3.el9_8.1
- python3-11-main-3.11.15-5.2.hum1
- rhui5/rhua-rhel9:1784795076
- python3-14-main-3.14.6-1.3.hum1
- python3.14-0:3.14.5-1.el10_2.1
- python3.12-0:3.12.9-2.el10_0.10
- python3-13-main-3.13.14-1.3.hum1
- python3.12-0:3.12.13-2.el10_2.1
- rhui5/cds-kubernetes-rhel9:1784794818
- python3.14-0:3.14.5-1.el9_8.1
- python3.9-0:3.9.25-7.el9_8.2
- rhui5/cds-rhel9:1784794778
- rhui5/haproxy-rhel9:1784795112
- discovery/discovery-server-rhel9:1784821670
- rhui5/installer-rhel9:1784794289
- python3-0:3.6.8-77.el8_10
- RHSA-2026:44481
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
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