9.2
Critique
CVE-2026-19445 A remote, unauthenticated TLS client can make a server crash or call through a freed pointer if its sni_callback assigns…
Description
A remote, unauthenticated TLS client can make a server crash or call through a freed pointer if its sni_callback assigns a different context to SSLSocket.context (the documented way to select a certificate per server name) and nothing else keeps the original ssl.SSLContext alive. Typical cases are servers that create an SSLContext per connection or replace it while connections are open; servers that wrap their listening socket with it are not affected. Mitigation: keep a reference to every SSLContext that sets sni_callback for the lifetime of the server. TLS clients are not affected.
Produits et versions touchés
Autres CVE de CPython
Les 80 CVE de CPython →
CVE-2026-119170
Regression in FIPS enforcement of hash algorithms affecting only Python 3.14.10
8.2
Élevée
CVE-2026-116566
socket.getaddrinfo() previously accepted null bytes within *host* and *port* parameters which can cause the values to be…
5.3
Moyenne
CVE-2026-103995
Lenient parsing of integers for response body and chunk framing
2.0
Faible
CVE-2026-115557
Python has added a denylist for known compromised certificates to the "ssl" module to ensure user safety even without…
9.4
Critique