CVE-2026-103995

UNKNOWN 0.0

Lenient parsing of integers for response body and chunk framing

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

Response body and chunk parsing would handle non-hex or negative integers incorrectly which could result in misinterpreting HTTP response contents.

CWE	CWE-444
Vendor	python software foundation
Product	cpython
Published	Oct 27, 2026

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Affected Versions

Python Software Foundation / CPython

0 < 3.16.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/python/cpython/pull/150752 github.com: https://github.com/python/cpython/issues/150751

Credits

🔍 Ekalabya Ghosh (https://github.com/not-ekalabya) metsw24-max (https://github.com/metsw24-max) Seth Larson (https://github.com/sethmlarson) Petr Viktorin (https://github.com/encukou)