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 version 0.16.0. Since exploitation requires the combination of buggy h11 with a buggy (reverse) proxy, fixing either component is sufficient to mitigate this issue.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| h11(PyPI) | 0 | 0.16.0 | N/A |
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