nodemailer
10.2.1 · 22 Oct 2026MIT-023.7M / weekRepositoryHomepagenpmAtom feed
Upgrading nodemailer from 6.9.11 to 10.1.4
63 releases in betweenevery note read
Before you upgrade
Tick each one off as you go- breaking10.0.0
- breaking9.0.0
- breaking8.0.0
- breaking7.0.0
Security
Fixes 21 advisories affecting 6.9.11
- Nodemailer: CRLF injection in Nodemailer List-* header comments allows arbitrary message header injectionmoderate · GHSA-268h-hp4c-crq3
- Nodemailer: Quadratic (O(n^2)) DKIM header unfolding lets a large folded header cause remote denial of service during signingmoderate · GHSA-39m8-27wv-hr27
- Nodemailer: Quadratic backtracking in SMTP AUTH mechanism detection regexes allows pre-auth remote denial of servicemoderate · GHSA-4ffr-jq9g-5ffx
- Nodemailer: Quadratic (O(n^2)) SMTP client reply parsing lets a malicious server or MITM cause a pre-auth remote denial of servicemoderate · GHSA-4g23-2xm8-66gc
- Nodemailer: Process-global DNS cache reuses TLS `servername` across transports, enabling cross-tenant SMTP credential disclosuremoderate · GHSA-6vj9-mwq6-2f5v
- Nodemailer: A ">" inside a quoted local part ends an angle-addr early in addressparser, delivering to a domain the header does not namemoderate · GHSA-85x2-q946-cp5h
- Nodemailer: A nested comment ends early in addressparser, releasing the rest of the comment as a recipientmoderate · GHSA-8c8m-p3m8-cjg8
- Nodemailer: resolveContent() on a MailMessage bypasses disableFileAccess/disableUrlAccess when called with the legacy signaturemoderate · GHSA-8m3c-c648-2xjj
- Nodemailer: Nested structured recipient arrays bypass the parser depth limit and cause stack exhaustion DoSmoderate · GHSA-8vvx-rff5-p5rq
- Nodemailer has SMTP command injection due to unsanitized `envelope.size` parameterlow · GHSA-c7w3-x93f-qmm8
- Nodemailer: RFC 5322 comment inside an angle-bracket address is never strippedmoderate · GHSA-g73g-hqqh-jr95
- Nodemailer: A ";" inside a quoted string or comment ends an address group early in addressparser, turning display text into a recipientmoderate · GHSA-m943-m63m-w62w
- Nodemailer: Email to an unintended domain can occur due to Interpretation Conflictmoderate · GHSA-mm7p-fcc7-pg87
- Nodemailer: Message-level raw option bypasses disableFileAccess/disableUrlAccess, enabling arbitrary file read and full-response SSRF in the delivered messagehigh · GHSA-p6gq-j5cr-w38f
- Nodemailer: Improper TLS Certificate Validation in OAuth2 Token Fetch Enables Credential Interceptionhigh · GHSA-r7g4-qg5f-qqm2
- Nodemailer’s addressparser is vulnerable to DoS caused by recursive callshigh · GHSA-rcmh-qjqh-p98v
- Nodemailer: Quadratic backtracking in the addressparser free-text fallback allows remote denial of servicehigh · GHSA-v53p-9fqp-m79j
- Nodemailer Vulnerable to SMTP Command Injection via CRLF in Transport name Option (EHLO/HELO) moderate · GHSA-vvjj-xcjg-gr5g
- Nodemailer: IDN/Punycode domain allow-list bypass leads to email delivery to an attacker-controlled domainmoderate · GHSA-wmmp-3585-3rmp
- Nodemailer jsonTransport bypasses disableFileAccess and disableUrlAccess during message normalizationmoderate · GHSA-wqvq-jvpq-h66f
- Nodemailer: Quadratic (O(n²)) time complexity in addressparser allows remote denial of service via a crafted address listhigh · GHSA-2x7j-588g-ccc2
- 8.0.9
Two pending security advisories (jsonTransport access bypass, List-* CRLF injection)
- 8.0.5
Sanitize CRLF in transport name option to prevent SMTP command injection (GHSA-vvjj-xcjg-gr5g)
- 8.0.4
Sanitize envelope size to prevent SMTP command injection
- 7.0.6
ReDoS vulnerability in parseDataURI and _processDataUrl
Release by release
- fixed
addressparser: apply the unexpected "<" rule outside quotes and comments
- fixed
addressparser: bound group nesting at ten levels
- fixed
addressparser: drop the obsolete route from an angle-addr
- fixed
addressparser: end a comment only at the ")" that closes the outermost one
- fixed
- fixed
Format References and strip URLs in linear time, release any number of streams
- fixed
- fixed
Bound the work a message can make the mailer do and keep per-message auth off the transport's token endpoint
- fixed
- fixed
fetch: strip credentials on any cross-origin redirect
- fixed
- new
Harden message streams, SMTP connections and the connection pool
- new
Encode base64 and quoted-printable without per-chunk delays
- fixed
Do not read the environment or the interface table on import
- fixed
End the SMTP session on any 421 reply and drive the envelope through one step
- new
- fixed
addressparser: keep an escaped parenthesis inside a comment
- fixed
fetch: keep the case of cookie names
- fixed
fetch: read the cookie name-value pair by position
- fixed
- fixed
addressparser: keep a quoted display name that holds no "@" out of the address
- fixed
addressparser: keep the group recursion depth out of the options object
- fixed
addressparser: stop a "[" from hiding the operators after it
- fixed
dkim: trim a header field name in linear time
- fixed
mime-funcs: read and write header parameters per rfc2045 and rfc2231
- fixed
Search only the new bytes for the end of the proxy CONNECT response
- fixed
1 internal line (docs, tests, tooling) left out.