Bug 2498696 - CVE-2026-15308 mingw-python3: Python: CPU Denial of Service in HTML parser via repeated unterminated markup declarations [fedora-all]
Summary: CVE-2026-15308 mingw-python3: Python: CPU Denial of Service in HTML parser vi...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: mingw-python3
Version: 45
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Sandro Mani
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["e4e01e88-5029-4403-9e37-e...
Depends On:
Blocks: CVE-2026-15308
TreeView+ depends on / blocked
 
Reported: 2026-07-09 20:10 UTC by Jon Moroney
Modified: 2026-09-23 03:19 UTC (History)
1 user (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2026-09-07 05:58:31 UTC
Type: ---
Embargoed:

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Description Jon Moroney 2026-07-09 20:10:34 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

The incremental HTML parser (html.parser.HTMLParser) allows for CPU
denial-of-service through repeated unterminated markup declarations when
processing uncontrolled data.
Comment 1 Aoife Moloney 2026-08-17 15:16:50 UTC 
This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.
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