Skip to main content
VulnerabilityPublished Updated

CVE-2026-100699: Node nodemailer · Nodemailer is a Node.js email-sending library

Affects node-nodemailerSource GCVE Database

0
Compare

Not known to be exploited · CVSS 5.3 Medium : upgrade to 10.0.9 when convenient.

Data as of 10 Nov 2026, 23:24 UTC

CVSS 3.1 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 10.0.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

Upgrade nodemailer to 10.0.9.

Affected software

ProductAffectedFixed in
npmnodemailerpkg:npm/nodemailerOther threatsAffected
  • >=9.1.0 <10.0.9
Fixed in
  • 10.0.9
Ubuntu 20.04 LTSnode-nodemailerpkg:deb/ubuntu/node-nodemailer?arch=source&distro=focalOther threatsAffected
  • 6.3.0-2 – 6.4.5-1
6 affected builds
Fixed in–
Ubuntu 22.04 LTSnode-nodemailerpkg:deb/ubuntu/node-nodemailer?arch=source&distro=jammyOther threatsAffected
  • 6.4.17-3 – 6.7.1+~6.4.4-1
4 affected builds
Fixed in–
Ubuntu 24.04 LTSnode-nodemailerpkg:deb/ubuntu/node-nodemailer?arch=source&distro=nobleOther threatsAffected
  • =6.9.4+~6.4.9-2
  • =6.9.4+~6.4.9-3ubuntu1
  • =6.9.4+~6.4.9-4
Fixed in–
Ubuntu 26.10node-nodemailerpkg:deb/ubuntu/node-nodemailer?arch=source&distro=stonkingOther threatsAffected
  • 8.0.4+~7.0.11-1 – 9.0.5+~8.0.1-1
5 affected builds
Fixed in–
Ubuntu 26.04 LTSnode-nodemailerpkg:deb/ubuntu/node-nodemailer?arch=source&distro=resoluteOther threatsAffected
  • 7.0.5+~7.0.1-1 – 8.0.4+~7.0.11-1
5 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade Nodemailer to version 10.0.9 or later, where this address parser vulnerability is fixed. No other mitigation is indicated or required.

Description

Nodemailer versions from 9.1.0 up to but not including 10.0.9 have a vulnerability in the address parser. This flaw mishandles email addresses with quoted local-parts followed by RFC 5322 comments, causing trailing comment-separated domain atoms to remain in the normalized address. This can lead to malformed recipient addresses in the SMTP envelope. The issue is fixed in Nodemailer version 10.0.9.

References

Community reviews

Loading reviews…