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Review curl 8.22.0's fix for HTTPS proxy CA-blob selection with Native CA, identify affected configurations, and run a safe proxy TLS regression test.

Audit proxy-based ad verification after Chrome 153 signals deprecation and removal of several Privacy Sandbox APIs. Map dependencies, dual-run evidence, and preserve regional controls.

Test Chrome 153's Rust-based XML parsing across proxy routes, encodings, responseXML, DOMParser, SVG resources, redirects, and malformed responses.

Chrome 152 includes a high-severity proxy-component fix. Use this practical checklist to patch browser fleets and validate proxy routing, authentication, DNS, sessions, and fallbacks.

Learn why curl now treats 401 on CONNECT as a tunnel failure, how it differs from proxy 407, and how to test the change safely.

Learn how curl 8.22 handles unknown Alt-Svc parameters and how to validate alternative-service caching in proxy-backed clients.

Learn what curl 8.22 fixed for IPv6 literal targets through non-tunneling HTTP proxies and how to run a safe upgrade regression.

Understand curl 8.22's exact HSTS directive matching fix and test how upgraded proxy clients handle lookalike tokens, HTTPS upgrades, and cached policy.

Understand CVE-2026-80231, identify affected Windows and macOS curl clients, and regression-test native CA settings across reused proxy connections.

Scope the wcurl Windows backslash bypass, upgrade affected curl and wcurl versions, and regression-test automated proxy download directories safely.