NPM: Nodemailer addressparser: O(n^2) on comment-joined addresses enables a remote DoS (reachable via mailparser)

NPM: Nodemailer addressparser: On^2 on comment-joined addresses enables a remote DoS reachable via mailparser vulnerability discovered by ? in WordPress Npm nodemailer versions = 9.1.0, = 10.0.4...

Nodemailer addressparser: O(n^2) on comment-joined addresses enables a remote DoS (reachable via mailparser)

Summary nodemailer/lib/addressparser parses one shape of address in On^2 time. A single 640 KB address value blocks the Node.js event loop for roughly 7 seconds. And it is reachable without auth: mailparser feeds inbound email headers straight into this parser, so one crafted email is enough to...

CVE-2026-100700

nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking behavior. Attackers can supply crafted email header values with long whitespace-free runs to block the Node.js event loop for tens of...

DEBIAN-CVE-2026-100700

nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking behavior. Attackers can supply crafted email header values with long whitespace-free runs to block the Node.js event loop for tens of...

DEBIAN-CVE-2026-100699

Nodemailer is a Node.js email-sending library. In versions = 9.1.0 and 10.0.9, the address parser src/addressparser mishandles addresses whose local-part is a quoted string and that are followed by RFC 5322 comments, allowing trailing comment-separated domain atoms to be retained in the normalize...

Improper Validation of Specified Quantity in Input

Overview nodemailer is an Easy as cake e-mail sending from your Node.js applications Affected versions of this package are vulnerable to Improper Validation of Specified Quantity in Input via the addressparser module's handling of quoted local-part addresses. When an address of the form...

CVE-2026-100700

nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking behavior. Attackers can supply crafted email header values with long whitespace-free runs to block the Node.js event loop for tens of...

UBUNTU-CVE-2026-100700

nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking behavior. Attackers can supply crafted email header values with long whitespace-free runs to block the Node.js event loop for tens of...

CVE-2026-100700 nodemailer before 10.0.6 Denial of Service via addressparser

nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking behavior. Attackers can supply crafted email header values with long whitespace-free runs to block the Node.js event loop for tens of...

EUVD-2026-87673

nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking behavior. Attackers can supply crafted email header values with long whitespace-free runs to block the Node.js event loop for tens of...

CVE-2026-100700

Versions of nodemailer prior to 10.0.6 are vulnerable to a Denial of Service (DoS) attack due to an inefficient regular expression in the addressparser free-text fallback pattern. The flaw allows for quadratic backtracking when processing untrusted input. Specifically, an attacker can submit craf...

CVE-2026-100700 nodemailer before 10.0.6 Denial of Service via addressparser

nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking behavior. Attackers can supply crafted email header values with long whitespace-free runs to block the Node.js event loop for tens of...

CVE-2026-100700 nodemailer before 10.0.6 Denial of Service via addressparser

nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking behavior. Attackers can supply crafted email header values with long whitespace-free runs to block the Node.js event loop for tens of...

CVE-2026-100699 Nodemailer before 10.0.9 Malformed Envelope Recipient via RFC 5322 Comment

Nodemailer is a Node.js email-sending library. In versions = 9.1.0 and 10.0.9, the address parser src/addressparser mishandles addresses whose local-part is a quoted string and that are followed by RFC 5322 comments, allowing trailing comment-separated domain atoms to be retained in the normalize...

Linux Distros Unpatched Vulnerability : CVE-2026-100700

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking...

CVE-2026-100699: Improper Input Validation

Nodemailer is a Node.js email-sending library. In versions = 9.1.0 and 10.0.9, the address parser src/addressparser mishandles addresses whose local-part is a quoted string and that are followed by RFC 5322 comments, allowing trailing comment-separated domain atoms to be retained in the normalize...

CVE-2026-100700: Inefficient Algorithmic Complexity

nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking behavior. Attackers can supply crafted email header values with long whitespace-free runs to block the Node.js event loop for tens of...

The vulnerability of the addressparser component in the Nodemailer library, which allows a hacker to trigger a service failure.

The vulnerability of the addressparser component in the Nodemailer email sending library is related to its algorithmic complexity. Exploiting this vulnerability could allow a malicious actor to cause service interruptions...

Linux Distros Unpatched Vulnerability : CVE-2026-92597

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Nodemailer versions = 6.9.16 and 9.1.0 mis-parse RFC 5322 comments in email addresses: in lib/addressparser, a comment closed immediately before a non-break...

Linux Distros Unpatched Vulnerability : CVE-2026-92596

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Nodemailer before 9.1.0 contains a quadratic time complexity vulnerability in the addressparser component that allows remote attackers to cause denial of servic...