Description (CNA)
h2 is a pure-Python implementation of a HTTP/2 protocol stack. Prior to version 4.3.0, an HTTP/2 request splitting vulnerability allows attackers to perform request smuggling attacks by injecting CRLF characters into headers. This occurs when servers downgrade HTTP/2 requests to HTTP/1.1 without properly validating header names/values, enabling attackers to manipulate request boundaries and bypass security controls. This issue has been patched in version 4.3.0.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| python-hyper / h2 | affected < 4.3.0 |
CWE
CWE-93
References
- https://github.com/python-hyper/h2/security/advisories/GHSA-847f-9342-265h
- https://github.com/python-hyper/h2/commit/035e9899f95e3709af098f578bfc3cd302298e3a
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.