Nodemailer: Process-global DNS cache reuses TLS `servername` across transports, enabling cross-tenant SMTP credential disclosure

Summary Nodemailer's process-global DNS cache is keyed only by host, but each cache entry also stores the caller-specific TLS servername. When two direct SMTPS transports use the same DNS host with different tls.servername values, the first transport's server name is returned to the second...

GHSA-6VJ9-MWQ6-2F5V Nodemailer: Process-global DNS cache reuses TLS `servername` across transports, enabling cross-tenant SMTP credential disclosure

Summary Nodemailer's process-global DNS cache is keyed only by host, but each cache entry also stores the caller-specific TLS servername. When two direct SMTPS transports use the same DNS host with different tls.servername values, the first transport's server name is returned to the second...

CVE-2022-33679

CVE-2022-33679 One day based on https://googleprojectzero.blogspot.com/2022/10/rc4-is-still-considered-harmful.html Usage usage: CVE-2022-33079.py -h -ts -debug -dc-ip ip address target serverName Example...

DEBIAN-CVE-2026-100701

Nodemailer versions 5.0.0 through 10.0.1 use a process-global DNS cache that is keyed only by the DNS host, while each cache entry also stores the caller-specific TLS servername. When two direct TLS/SMTPS transports secure: true resolve the same non-IP host with different tls.servername values, t...

CVE-2026-100701 Nodemailer 5.0.0 through 10.0.1 TLS servername Cache Confusion

Nodemailer versions 5.0.0 through 10.0.1 use a process-global DNS cache that is keyed only by the DNS host, while each cache entry also stores the caller-specific TLS servername. When two direct TLS/SMTPS transports secure: true resolve the same non-IP host with different tls.servername values, t...

CVE-2026-100701 Nodemailer 5.0.0 through 10.0.1 TLS servername Cache Confusion

Nodemailer versions 5.0.0 through 10.0.1 use a process-global DNS cache that is keyed only by the DNS host, while each cache entry also stores the caller-specific TLS servername. When two direct TLS/SMTPS transports secure: true resolve the same non-IP host with different tls.servername values, t...

EUVD-2026-87674

Nodemailer versions 5.0.0 through 10.0.1 use a process-global DNS cache that is keyed only by the DNS host, while each cache entry also stores the caller-specific TLS servername. When two direct TLS/SMTPS transports secure: true resolve the same non-IP host with different tls.servername values, t...

CVE-2026-100701 Nodemailer 5.0.0 through 10.0.1 TLS servername Cache Confusion

Nodemailer versions 5.0.0 through 10.0.1 use a process-global DNS cache that is keyed only by the DNS host, while each cache entry also stores the caller-specific TLS servername. When two direct TLS/SMTPS transports secure: true resolve the same non-IP host with different tls.servername values, t...

eclipse-vertx/vert.x: eclipse-vertx/vert.x: Denial of Service via TLS handshake with wildcard server name

A flaw was found in eclipse-vertx/vert.x. A remote attacker can exploit this vulnerability by performing a Transport Layer Security TLS handshake and presenting a server name extension with a server wildcard name. This can lead to a denial of service DoS condition, impacting the availability of t...

Security update for python3-pyOpenSSL

This update for python3-pyOpenSSL fixes the following issue: CVE-2026-27448: unhandled exception in settlsextservernamecallback callback can result in connection not being cancelled and allows for possible security measure bypassing bsc1259804. Patch Instructions: To install this SUSE update use...

SUSE-SU-2026:3424-1 Security update for python3-pyOpenSSL

This update for python3-pyOpenSSL fixes the following issue: - CVE-2026-27448: unhandled exception in settlsextservernamecallback callback can result in connection not being cancelled and allows for possible security measure bypassing bsc1259804...

CVE-2026-63096 Dendrite 0.13.8 SSRF via Unauthenticated Legacy Media Download Endpoint

Dendrite through 0.13.8 contains a server-side request forgery vulnerability that allows unauthenticated attackers to cause the server to open outbound TLS connections to arbitrary hosts and ports by supplying an unvalidated serverName parameter to the legacy media download endpoint. Attackers ca...

CVE-2026-63096: Server-Side Request Forgery (SSRF)

Dendrite through 0.13.8 contains a server-side request forgery vulnerability that allows unauthenticated attackers to cause the server to open outbound TLS connections to arbitrary hosts and ports by supplying an unvalidated serverName parameter to the legacy media download endpoint. Attackers ca...

CVE-2026-44452

CVE-2026-44452 affects the h2o HTTP server (supports HTTP/1.x, 2, 3). Affected behavior occurs when a TLS/QUIC ClientHello contains a zero-length SNI extension; h2o can attempt to copy the hostname assuming NULL-termination, causing a heap/segmentation fault that may enable a denial-of-service. T...

EulerOS 2.0 SP15 : pyOpenSSL (EulerOS-SA-2026-2458)

According to the versions of the pyOpenSSL packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 22.0.0 and prior to version 26.0.0, if a user provided callback t...

Improper Certificate Validation

Overview Affected versions of this package are vulnerable to Improper Certificate Validation in TLSSocket.prototype.setSession lib/internal/tls/wrap.js, which reuses a cached TLS session for a connection with a different servername without re-verifying the server's certificate against the new hos...

EulerOS Virtualization 2.13.0 : pyOpenSSL (EulerOS-SA-2026-2414)

According to the versions of the pyOpenSSL packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 0.14.0 and prior to version 26.0.0, if a user...

EulerOS 2.0 SP13 : pyOpenSSL (EulerOS-SA-2026-2308)

According to the versions of the pyOpenSSL packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 0.14.0 and prior to version 26.0.0, if a user provided callback t...

USN-8335-1 pyopenssl vulnerability

It was discovered that pyOpenSSL incorrectly handled exceptions in the tlsextservername callback. This could result in connections being accepted after an exception, contrary to expectations...

TOTOLINK A8000RU operating system command injection vulnerability (CNVD-2026-32392)

TOTOLINK A8000RU is a wireless router produced by China Jiying Electronics. The TOTOLINK A8000RU has a vulnerability related to operating system command injection. This vulnerability stems from the failure of the setOpenVpnCertGenerationCfg function in the Web management interface’s cstecgi.cgi...