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THREAT OPS › Threat News › [NVD] CVE-2026-90776 (HIGH 7.5) — Nodemailer versions 9.1.0 through 10.0.4 contain a quadratic time complexity vulnerability in the addressparser component when parsing email addresses with RFC 5322 comments. Attackers can craft malicious email headers with comment-separated atoms to consume excessive CPU and blo

[NVD] CVE-2026-90776 (HIGH 7.5) — Nodemailer versions 9.1.0 through 10.0.4 contain a quadratic time complexity vulnerability in the addressparser component when parsing email addresses with RFC 5322 comments. Attackers can craft malicious email headers with comment-separated atoms to consume excessive CPU and blo

mednvdPublished 2026-09-13

CVE-2026-90776 CVSS: 7.5 HIGH Published: 2026-09-13T12:17:16.547

Nodemailer versions 9.1.0 through 10.0.4 contain a quadratic time complexity vulnerability in the addressparser component when parsing email addresses with RFC 5322 comments. Attackers can craft malicious email headers with comment-separated atoms to consume excessive CPU and block the Node.js event loop for several seconds, causing

MITRE ATT&CK techniques

Email AddressesT1589.002

Indicators of compromise

CVE-2026-90776cve

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-90776