CVE Alert: CVE-2025-43859
Vulnerability Summary: CVE-2025-43859
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.
Affected Endpoints:
No affected endpoints listed.
Published Date:
4/24/2025, 7:15:47 PM
💀 CVSS Score:
Exploit Status:
Not ExploitedReferences:
- https://github.com/python-hyper/h11/commit/114803a29ce50116dc47951c690ad4892b1a36ed
- https://github.com/python-hyper/h11/security/advisories/GHSA-vqfr-h8mv-ghfj
Recommended Action:
No proposed action available. Please refer to vendor documentation for updates.
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