80 matches found
PSF-2026-44
ssl.SSLContext.wrapbio didn't require the serverhostname argument to not be None if ssl.SSLContext.checkhostname was set. Due to a missing parameter check in SSLObject, if the serverhostname argument isn't supplied then hostname verification would be silently skipped. This defect could lead to...
CVE-2026-19445 Use-after-free of a server-side SSLContext when sni_callback switches contexts
A remote, unauthenticated TLS client can make a server crash or call through a freed pointer if its snicallback 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...
EUVD-2026-90077
A remote, unauthenticated TLS client can make a server crash or call through a freed pointer if its snicallback 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...
CVE-2026-19445 Use-after-free of a server-side SSLContext when sni_callback switches contexts
A remote, unauthenticated TLS client can make a server crash or call through a freed pointer if its snicallback 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...
CVE-2026-19445
A remote, unauthenticated TLS client can trigger a server crash or a use-after-free (calling through a freed pointer) vulnerability. This occurs when the sni_callback assigns a different context to SSLSocket.context —the standard method for selecting certificates per server name—without any other...
Netty: SNI Routing Bypass via Fragmented TLS ClientHello Causing Fallback to Default SslContext
Summary A fragmented TLS ClientHello whose handshake header spans multiple records makes Netty silently fall back to the default SslContext; where per-SNI selection is the sole mTLS gate, an unauthenticated attacker can bypass the route's mTLS requirement. Details In...
DEBIAN-CVE-2026-75595
Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Fina and 4.2.17.Final, io.netty.handler.ssl.SslClientHelloHandlerdecode checks the wrong offset before reading the four-byte TLS handshake header, so a ClientHello whose handshake header spans records can cause...
CVE-2026-75595 Netty: SNI Routing Bypass via Fragmented TLS ClientHello Causing Fallback to Default SslContext
Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Fina and 4.2.17.Final, io.netty.handler.ssl.SslClientHelloHandlerdecode checks the wrong offset before reading the four-byte TLS handshake header, so a ClientHello whose handshake header spans records can cause...
CVE-2026-75595
Netty (asynchronous, event-driven network framework) is affected by an SNI routing bypass in io.netty.handler.ssl.SslClientHelloHandler#decode . The method checks the wrong offset before reading the four-byte TLS handshake header, so a ClientHello whose handshake header spans records triggers an ...
CVE-2026-75595 Netty: SNI Routing Bypass via Fragmented TLS ClientHello Causing Fallback to Default SslContext
Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Fina and 4.2.17.Final, io.netty.handler.ssl.SslClientHelloHandlerdecode checks the wrong offset before reading the four-byte TLS handshake header, so a ClientHello whose handshake header spans records can cause...
PT-2026-78717
Name of the Vulnerable Software and Affected Versions Netty versions prior to 4.1.137.Final Netty versions prior to 4.2.17.Final Description An issue exists in the decode function of io.netty.handler.ssl.SslClientHelloHandler where an incorrect offset is checked before reading the four-byte TLS...
CVE-2026-59825
Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.19 and from 4.5.0 until 4.5.12, Mastodon's app/models/concerns/user/ldapauthenticable.rb mutates OpenSSL::SSL::SSLContext::DEFAULTPARAMS when LDAP authentication uses LDAPTLSNOVERIFY=true, disabling SSL and T...
EUVD-2026-60953
Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.19 and from 4.5.0 until 4.5.12, Mastodon's app/models/concerns/user/ldapauthenticable.rb mutates OpenSSL::SSL::SSLContext::DEFAULTPARAMS when LDAP authentication uses LDAPTLSNOVERIFY=true, disabling SSL and T...
CVE-2026-59825 Mastodon: Unwanted deactivation of SSL/TLS certificate verification
Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.19 and from 4.5.0 until 4.5.12, Mastodon's app/models/concerns/user/ldapauthenticable.rb mutates OpenSSL::SSL::SSLContext::DEFAULTPARAMS when LDAP authentication uses LDAPTLSNOVERIFY=true, disabling SSL and T...
EulerOS Virtualization 2.13.0 : python3 (EulerOS-SA-2026-2188)
According to the versions of the python3 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : If the value passed to os.path.expandvars is user-controlled a performance degradation is possible when expanding environment...
Siemens Ruggedcom ROX Improper Input Validation (CVE-2024-5642)
CPython 3.9 and earlier doesn't disallow configuring an empty list for SSLContext.setnpnprotocols which is an invalid value for the underlying OpenSSL API. This results in a buffer over-read when NPN is used see CVE-2024-5535 for OpenSSL. This vulnerability is of low severity due to NPN being not...
BIT-PYTHON-MIN-2024-5642 Buffer overread when using an empty list with SSLContext.set_npn_protocols()
CPython 3.9 and earlier doesn't disallow configuring an empty list "" for SSLContext.setnpnprotocols which is an invalid value for the underlying OpenSSL API. This results in a buffer over-read when NPN is used see CVE-2024-5535 for OpenSSL. This vulnerability is of low severity due to NPN being...
BIT-PYTHON-2024-5642 Buffer overread when using an empty list with SSLContext.set_npn_protocols()
CPython 3.9 and earlier doesn't disallow configuring an empty list "" for SSLContext.setnpnprotocols which is an invalid value for the underlying OpenSSL API. This results in a buffer over-read when NPN is used see CVE-2024-5535 for OpenSSL. This vulnerability is of low severity due to NPN being...