CVE-2022-29361: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

May 25, 2022 (updated November 7, 2023)

Improper parsing of HTTP requests in Pallets Werkzeug v2.1.0 and below allows attackers to perform HTTP Request Smuggling using a crafted HTTP request with multiple requests included inside the body. NOTE: the vendor’s position is that this behavior can only occur in unsupported configurations involving development mode and an HTTP server from outside the Werkzeug project

References

github.com/pallets/werkzeug/commit/9a3a981d70d2e9ec3344b5192f86fcaf3210cd85
github.com/pallets/werkzeug/issues/2420
nvd.nist.gov/vuln/detail/CVE-2022-29361

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