Bug 2498608 (CVE-2026-15308) - CVE-2026-15308 python: Python: CPU Denial of Service in HTML parser via repeated unterminated markup declarations
Summary: CVE-2026-15308 python: Python: CPU Denial of Service in HTML parser via repea...
Keywords:
Status: NEW
Alias: CVE-2026-15308
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2498690 2498691 2498692 2498693 2498695 2498696 2498698 2498687 2498688 2498689 2498694 2498697
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-09 18:02 UTC by OSIDB Bzimport
Modified: 2026-08-08 14:41 UTC (History)
20 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2026:46507 0 None None None 2026-07-27 10:30:43 UTC
Red Hat Product Errata RHBA-2026:46536 0 None None None 2026-07-27 12:50:23 UTC
Red Hat Product Errata RHSA-2026:39183 0 None None None 2026-07-14 12:34:02 UTC
Red Hat Product Errata RHSA-2026:39320 0 None None None 2026-07-14 15:28:39 UTC
Red Hat Product Errata RHSA-2026:39771 0 None None None 2026-07-15 09:12:13 UTC
Red Hat Product Errata RHSA-2026:39798 0 None None None 2026-07-15 10:30:46 UTC
Red Hat Product Errata RHSA-2026:39893 0 None None None 2026-07-15 12:29:56 UTC
Red Hat Product Errata RHSA-2026:40856 0 None None None 2026-07-16 10:09:56 UTC
Red Hat Product Errata RHSA-2026:41949 0 None None None 2026-07-20 14:46:10 UTC
Red Hat Product Errata RHSA-2026:47939 0 None None None 2026-07-29 21:03:11 UTC
Red Hat Product Errata RHSA-2026:50064 0 None None None 2026-08-04 13:11:54 UTC
Red Hat Product Errata RHSA-2026:50065 0 None None None 2026-08-04 13:03:59 UTC
Red Hat Product Errata RHSA-2026:50770 0 None None None 2026-08-05 11:36:49 UTC
Red Hat Product Errata RHSA-2026:50771 0 None None None 2026-08-05 11:20:39 UTC
Red Hat Product Errata RHSA-2026:50816 0 None None None 2026-08-05 14:21:32 UTC

Description OSIDB Bzimport 2026-07-09 18:02:33 UTC 
The incremental HTML parser (html.parser.HTMLParser) allows for CPU
denial-of-service through repeated unterminated markup declarations when
processing uncontrolled data.
Comment 1 errata-xmlrpc 2026-07-14 12:34:00 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:39183 https://access.redhat.com/errata/RHSA-2026:39183
Comment 2 errata-xmlrpc 2026-07-14 15:28:38 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:39320 https://access.redhat.com/errata/RHSA-2026:39320
Comment 3 errata-xmlrpc 2026-07-15 09:12:11 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:39771 https://access.redhat.com/errata/RHSA-2026:39771
Comment 4 errata-xmlrpc 2026-07-15 10:30:45 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:39798 https://access.redhat.com/errata/RHSA-2026:39798
Comment 5 errata-xmlrpc 2026-07-15 12:29:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:39893 https://access.redhat.com/errata/RHSA-2026:39893
Comment 6 errata-xmlrpc 2026-07-16 10:09:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:40856 https://access.redhat.com/errata/RHSA-2026:40856
Comment 7 errata-xmlrpc 2026-07-20 14:46:08 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:41949 https://access.redhat.com/errata/RHSA-2026:41949
Comment 8 errata-xmlrpc 2026-07-29 21:03:08 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:47939 https://access.redhat.com/errata/RHSA-2026:47939
Comment 11 errata-xmlrpc 2026-08-04 13:03:57 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:50065 https://access.redhat.com/errata/RHSA-2026:50065
Comment 12 errata-xmlrpc 2026-08-04 13:11:52 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:50064 https://access.redhat.com/errata/RHSA-2026:50064
Comment 13 errata-xmlrpc 2026-08-05 11:20:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:50771 https://access.redhat.com/errata/RHSA-2026:50771
Comment 14 errata-xmlrpc 2026-08-05 11:36:47 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:50770 https://access.redhat.com/errata/RHSA-2026:50770
Comment 15 errata-xmlrpc 2026-08-05 14:21:30 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:50816 https://access.redhat.com/errata/RHSA-2026:50816
Note You need to log in before you can comment on or make changes to this bug.