The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.
The undertow client is not checking the server identity presented by the server certificate in https connections. This is a compulsory step (at least it should be performed by default) in https and in http/2. I would add it to any TLS client protocol.
Starlette has missing Host header validation that poisons request.url.path, bypassing path-based security checks
Published 2026-05-26 · Analyzed
6.5KEVEPSS 0.071
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