nodemailer
10.2.1 · 22 Oct 2026MIT-023.7M / weekRepositoryHomepagenpmAtom feed
Your version
9.1.1 is the newest release of 9.x.
In short
1 new7 fixed
Security
Fixes 3 advisories that affected 9.0.6
- HighNodemailer: Quadratic (O(n²)) time complexity in addressparser allows remote denial of service via a crafted address listGHSA-2x7j-588g-ccc2 · 8 Sep 2026Fixed in 9.1.0
- ModerateNodemailer: IDN/Punycode domain allow-list bypass leads to email delivery to an attacker-controlled domainGHSA-wmmp-3585-3rmp · 8 Sep 2026Fixed in 9.1.0
- ModerateNodemailer: Recipient-domain validation bypass via RFC 5322 comment mis-parsing leads to email delivery to an attacker-controlled domainGHSA-cc9r-2j5m-2m83 · 8 Sep 2026Fixed in 9.1.0
13 advisories affect 9.1.0; 10.1.4 fixes them
- HighNodemailer addressparser: O(n^2) on comment-joined addresses enables a remote DoS (reachable via mailparser)GHSA-prgh-xp8r-p3m5 · 30 Sep 2026Fixed in 10.0.5
- HighNodemailer: Quadratic backtracking in the addressparser free-text fallback allows remote denial of serviceGHSA-v53p-9fqp-m79j · 29 Sep 2026Fixed in 10.0.6
- ModerateNodemailer: Quadratic backtracking in SMTP AUTH mechanism detection regexes allows pre-auth remote denial of serviceGHSA-4ffr-jq9g-5ffx · 27 Oct 2026Fixed in 10.0.13
- ModerateNodemailer: RFC 5322 comment inside an angle-bracket address is never strippedGHSA-g73g-hqqh-jr95 · 27 Oct 2026Fixed in 10.0.13
- ModerateNodemailer: Quadratic (O(n^2)) SMTP client reply parsing lets a malicious server or MITM cause a pre-auth remote denial of serviceGHSA-4g23-2xm8-66gc · 27 Oct 2026Fixed in 10.0.10
8 more
- ModerateNodemailer: A nested comment ends early in addressparser, releasing the rest of the comment as a recipientGHSA-8c8m-p3m8-cjg8 · 23 Oct 2026Fixed in 10.1.4
- ModerateNodemailer: A ";" inside a quoted string or comment ends an address group early in addressparser, turning display text into a recipientGHSA-m943-m63m-w62w · 23 Oct 2026Fixed in 10.1.4
- ModerateNodemailer: A ">" inside a quoted local part ends an angle-addr early in addressparser, delivering to a domain the header does not nameGHSA-85x2-q946-cp5h · 23 Oct 2026Fixed in 10.1.4
- ModerateNodemailer: Quadratic (O(n^2)) DKIM header unfolding lets a large folded header cause remote denial of service during signingGHSA-39m8-27wv-hr27 · 22 Oct 2026Fixed in 10.0.10
- ModerateNodemailer: Quoted local-part can produce malformed envelope recipient through RFC 5322 comment parsingGHSA-g57g-f23g-4646 · 29 Sep 2026Fixed in 10.0.9
- ModerateNodemailer: Nested structured recipient arrays bypass the parser depth limit and cause stack exhaustion DoSGHSA-8vvx-rff5-p5rq · 29 Sep 2026Fixed in 10.0.2
- ModerateNodemailer: Process-global DNS cache reuses TLS `servername` across transports, enabling cross-tenant SMTP credential disclosureGHSA-6vj9-mwq6-2f5v · 28 Sep 2026Fixed in 10.0.2
- ModerateNodemailer: resolveContent() on a MailMessage bypasses disableFileAccess/disableUrlAccess when called with the legacy signatureGHSA-8m3c-c648-2xjj · 8 Sep 2026Fixed in 9.1.1
Release note
Features
mailer: cap recipients per message with maxRecipients
Bug Fixes
addressparser: handle address lists in linear time
addressparser: terminate the domain at an RFC 5322 comment
mime-node: apply UTS-46 mapping when encoding a domain
mime-node: dedupe envelope recipients in linear time
mime-node: flatten parsed addresses without concat.apply
mime-node: keep the recipient dedupe linear across address headers
mime-node: keep URL delimiters away from the domain mapper