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Understand curl 8.22's public-suffix cookie fix, identify affected libcurl clients, and test cookie-domain isolation across proxy routes and redirects.

Understand CVE-2026-80255, identify affected curl clients, test Secure cookie parsing, and protect proxy automation from HTTP downgrade paths.

Scope CVE-2026-80230 accurately, identify affected curl builds, test pinned-key failure paths, and upgrade proxy clients safely.

Learn what curl 8.22 changes when a proxy port changes and how to regression-test authentication, connection reuse, and fail-closed routing.

Understand curl 8.22's HTTP/3 proxy header-order hardening and build a safe regression test for malformed proxy responses and fail-closed recovery.

Learn how curl 8.22 aligns quiche's HTTP/3 field-section limit with curl and how to regression-test large authorized response headers across network paths.

Understand curl 8.22's mbedTLS hostname-verification fix and use a controlled test matrix for HTTPS proxy and origin TLS layers.

Understand curl 8.22's missing-certificate pinning fix and test separate origin and HTTPS-proxy pins without exposing credentials or weakening TLS verification.

Understand curl 8.22's large custom request-header fix and run a safe proxy regression test covering transmission, redirects, CONNECT boundaries and oversized failures.

Understand curl 8.22's SPNEGO NTLM fallback change and run a controlled enterprise proxy authentication regression test covering Kerberos, 407, reuse and rollback.