Vulnerability Description
The html.parser.HTMLParser class had worse-case quadratic complexity when processing certain crafted malformed inputs potentially leading to amplified denial-of-service.
CVSS Score
4.3
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Related Weaknesses (CWE)
References
- https://github.com/python/cpython/commit/4455cbabf991e202185a25a631af206f60bbc94
- https://github.com/python/cpython/commit/6eb6c5dbfb528bd07d77b60fd71fd05d81d45c4
- https://github.com/python/cpython/commit/8d1b3dfa09135affbbf27fb8babcf3c11415df4
- https://github.com/python/cpython/commit/ab0893fd5c579d9cea30841680e6d35fc478afb
- https://github.com/python/cpython/commit/d851f8e258c7328814943e923a7df81bca15df4
- https://github.com/python/cpython/commit/f3c6f882cddc8dc30320d2e73edf019e201394f
- https://github.com/python/cpython/commit/fdc9d214c01cb4588f540cfa03726bbf2a33fc1
- https://github.com/python/cpython/issues/135462
- https://github.com/python/cpython/pull/135464
- https://mail.python.org/archives/list/[email protected]/thread/K5PIYL
FAQ
What is CVE-2025-6069?
CVE-2025-6069 is a vulnerability with a CVSS score of 4.3 (MEDIUM). The html.parser.HTMLParser class had worse-case quadratic complexity when processing certain crafted malformed inputs potentially leading to amplified denial-of-service.
How severe is CVE-2025-6069?
CVE-2025-6069 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-6069?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.