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...

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

NPM: Nodemailer: Process-global DNS cache reuses TLS servername across transports, enabling cross-tenant SMTP credential disclosure vulnerability discovered by ? in WordPress Npm nodemailer versions = 5.0.0, 10.0.2...

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...

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 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...

Improper Certificate Validation

Overview nodemailer is an Easy as cake e-mail sending from your Node.js applications Affected versions of this package are vulnerable to Improper Certificate Validation via the DNS cache in src/shared/index.ts, where the TLS server name SNI is stored alongside resolved addresses and keyed only by...

UBUNTU-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 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

A flaw was found in nodemailer. In multi-tenant environments, a remote attacker can exploit a cache confusion vulnerability by priming the shared Domain Name System DNS cache with a custom Transport Layer Security TLS server name. Because cached entries overwrite subsequent connection...

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 versions 5.0.0 through 10.0.1 are vulnerable to a TLS servername cache confusion flaw. The application uses a process-global DNS cache keyed only by the DNS host, which incorrectly stores and returns caller-specific TLS servernames. When two different transports resolve the same host w...

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 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: Improper Certificate Validation

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...

PT-2026-99372

Name of the Vulnerable Software and Affected Versions Nodemailer versions 5.0.0 through 10.0.1 Description Nodemailer uses a process-global DNS cache keyed only by the DNS host, but stores the caller-specific TLS servername within each entry. When two direct TLS/SMTPS transports configured with...

Linux Distros Unpatched Vulnerability : CVE-2026-100701

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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-specif...

OESA-2026-4018 coredns security update

CoreDNS is a fast and flexible DNS server. The key word here is flexible: with CoreDNS you are able to do what you want with your DNS data by utilizing plugins. Security Fixes: An issue was discovered in CoreDNS through 1.10.1. There is a vulnerability in DNS resolving software, which triggers a...

Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: unbound (UTSA-2026-123924)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-123924 advisory. In NLnet Labs Unbound 1.4.22 up to and including 1.25.1, UDP source port is randomized and intended to serve as a secret value that increases the entropy of DNS...