Overview
What is CVE-2025-6069?
The html.parser.HTMLParser class had worse-case quadratic complexity when processing certain crafted malformed inputs potentially leading to amplified denial-of-service.
CVE intelligence
CVE-2025-6069
Vulnerability intelligence
4.3MEDIUMCVSS out of 10
What this means
Review the available evidence
CVE-2025-6069 and is rated Medium severity with a CVSS score of 4.3. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
CISA KEVNot listedBased on the latest collected catalog
EPSS0.6%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships