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CVE-2026-121424VulnerabilityPublished

Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser that allows remote

Source GCVE Database

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Authoritative record:CVE-2026-121424· High 8.3

Not known to be exploited · CVSS 8.3 High : upgrade to 10.1.4 soon.

Data as of 3 Nov 2026, 16:29 UTC

CVSS 4.0 base score
8.3High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (VulnCheck)CVSS 4.08.3
CNA (VulnCheck)CVSS 3.16.5
Patch
Available – fixed in 10.1.4
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 3 Nov 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 3 Nov 2026.

What to do

Upgrade nodemailer to 10.1.4.

Affected software

ProductAffectedFixed in
nodemailernodemailerAffected
  • >=3.0.0 <10.1.4
Fixed in
  • 10.1.4
npmnodemailerpkg:npm/nodemailerOther threatsAffected
  • >=3.0.0 <10.1.4
Fixed in
  • 10.1.4

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

AI-suggested

A fix is available in Nodemailer version 10.1.4 and later. Users should upgrade to version 10.1.4 or newer to remediate this vulnerability. No other mitigation guidance is provided in the data.

Description

Nodemailer versions from 3.0.0 up to but not including 10.1.4 contain an address parsing vulnerability in the addressparser component. This flaw allows remote attackers to craft email addresses with nested RFC 5322 comments that terminate prematurely, enabling recipient redirection. The vulnerability can bypass conformant validators and recipient allow lists, potentially allowing attackers to receive mail or spoof senders.

References

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