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.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/python/cpython/commit/4455cbabf991e202185a25a631af206f60bbc949
https://github.com/python/cpython/commit/6eb6c5dbfb528bd07d77b60fd71fd05d81d45c41
https://github.com/python/cpython/commit/8d1b3dfa09135affbbf27fb8babcf3c11415df49
https://github.com/python/cpython/commit/ab0893fd5c579d9cea30841680e6d35fc478afb5
https://github.com/python/cpython/commit/d851f8e258c7328814943e923a7df81bca15df4b
https://github.com/python/cpython/commit/f3c6f882cddc8dc30320d2e73edf019e201394fc
https://github.com/python/cpython/commit/fdc9d214c01cb4588f540cfa03726bbf2a33fc15
https://github.com/python/cpython/issues/135462
https://github.com/python/cpython/pull/135464
https://mail.python.org/archives/list/[email protected]/thread/K5PIYLR6EP3WR7ZOKKYQUWEDNQVUXOYM/

Configurations

No configuration.

History

No history.

Information

Published : 2025-06-17 14:15

Updated : 2025-07-07 18:15

NVD link : CVE-2025-6069

Mitre link : CVE-2025-6069

CVE.ORG link : CVE-2025-6069

JSON object : View

Products Affected

No product.

CWE

CWE-1333

Inefficient Regular Expression Complexity

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