Topic

SNI Callback

News, analysis and practical guidance on SNI Callback.

1 articleUpdated 1 Oct 2026

ThreatsCloud & SaaSBreaking
CPython Standard Library SSL Module Flaw Exposes TLS Servers to Remote Memory Corruption and Execution (CVE-2026-19445)
A critical use-after-free flaw in Python's ssl module allows remote unauthenticated clients to crash TLS servers or hijack function pointers via SNI callbacks.
CST Newsroom1 Oct 202612 min read