VULNERABILITY INTELLIGENCE

CVE-2026-15308

CVSS score7.5 HIGH
EPSS probability0.64%
CISA KEVNot currently listed
Published2026-07-09
Last modified2026-10-25
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

The incremental HTML parser (html.parser.HTMLParser) allows for CPU denial-of-service through repeated unterminated markup declarations when processing uncontrolled data.

Weakness classification

  • cna@python.org: CWE-400
  • nvd@nist.gov: NVD-CWE-noinfo

Primary references