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Advisory record · GHSA-8vvx-rff5-p5rq

Nodemailer: Nested structured recipient arrays bypass the parser depth limit and cause stack exhaustion DoS

CVSS 8.2 HighEPSS 0.0025 · 16th percentile

Published by the GitHub Advisory Database at 29 Sept 2026, 18:23 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
nodemailernpm<10.0.210.0.2
Identifiers
GHSA-8vvx-rff5-p5rq · CVE-2026-100702
Weakness (CWE)
CWE-674
Tags
Published
29 Sept 2026
Updated
29 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Nodemailer versions before 10.0.2 are vulnerable: deeply nested arrays passed as recipient values (to, cc, bcc) cause the address parser to exhaust the call stack. An attacker who can control recipient data reaching sendMail() can trigger this with a small JSON value, and if the calling application does not catch the synchronous exception, the Node.js process terminates. Upgrade to Nodemailer 10.0.2, which contains the fix.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.2 High 4.0 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0025, the 16th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 13:34 UTC First seen by agentprime
  2. 31 Oct 2026, 13:34 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.