python-hyper h11 vulnerabilities (CVE)

CVE records published for python-hyper h11, newest first. Follow to get an email when a new one appears.

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9.1Critical
CVE-2025-43859

h11 accepts some malformed Chunked-Encoding bodies

python-hyper h11

h11 is a Python implementation of HTTP/1.1. Prior to version 0.16.0, a leniency in h11's parsing of line terminators in chunked-coding message bodies can lead to request smuggling vulnerabilities under certain conditions. This issue has been patched in versio…