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h11 (PyPI)

A pure-Python, bring-your-own-I/O implementation of HTTP/1.1

Advisories
3
Latest version
0.16.0
Released Apr 24, 2025
License
MIT
OpenSSF Scorecard
4.4 / 10

How to fix

Upgrading to 0.16.0 or later clears every advisory below that has a fix.

Upgrade commands
pip
pip install --upgrade "h11>=0.16.0"
poetry
poetry add "h11>=0.16.0"
uv
uv add "h11>=0.16.0"

Known vulnerabilities

AdvisorySeverityAffectedFixed in
GHSA-vqfr-h8mv-ghfj
h11 accepts some malformed Chunked-Encoding bodies
Critical
EPSS 0.59%
< 0.16.0
0.16.0
GHSA-vqfr-h8mv-ghfj
h11 accepts some malformed Chunked-Encoding bodies
Critical
EPSS 0.59%
< 0.16.0
0.16.0
GHSA-vqfr-h8mv-ghfj
h11 accepts some malformed Chunked-Encoding bodies
Critical
EPSS 0.59%
< 0.16.0
0.16.0

Source: https://github.com/python-hyper/h11

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