Node nodemailer: Nodemailer 3.0.0 before 10.4.1 contains an address parsing flaw in addressparser that truncates
Affects node-nodemailerSource GCVE Database
Not known to be exploited · CVSS 8.3 High · fixed in 10.4.1 : patch node-nodemailer soon.
Data as of 13 Nov 2026, 22:33 UTC
Thin evidence
One scorer or none| CNA (VulnCheck) | CVSS 4.0 | 8.3 |
|---|---|---|
| CNA (VulnCheck) | CVSS 3.1 | 6.5 |
- Patch
- Available – fixed in 10.4.1
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 10 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 13 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10node-nodemailerpkg:deb/ubuntu/node-nodemailer?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSnode-nodemailerpkg:deb/ubuntu/node-nodemailer?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSnode-nodemailerpkg:deb/ubuntu/node-nodemailer?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 22.04 LTSnode-nodemailerpkg:deb/ubuntu/node-nodemailer?arch=source&distro=jammyOther threats | Affected
| Fixed in– |
Ubuntu 20.04 LTSnode-nodemailerpkg:deb/ubuntu/node-nodemailer?arch=source&distro=focalOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
The vulnerability is fixed in Nodemailer version 10.4.1 and later. Users should upgrade to version 10.4.1 or newer to remediate this issue. No other mitigations are indicated.
Description
Nodemailer versions before 10.4.1 contain an address parsing flaw in the addressparser component that truncates domains at folding whitespace or comments before a dot. This flaw allows attackers to bypass recipient domain restrictions by submitting crafted email addresses in to, cc, bcc, or replyTo fields that appear valid per RFC 5322 domain checks but actually deliver mail to attacker-controlled addresses under the application's sender identity.
References
- ubuntu.com/security/CVE-2026-125755 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-125755 (opens in a new tab)
- github.com/nodemailer/nodemailer/blob/3b5cf1eec32c81f287870c8a1c9c09640062cfd5/src/addressparser/index.ts (opens in a new tab)
- github.com/nodemailer/nodemailer/commit/c2b9c41bb81b2294ebadd294ad15ff035a17d0a5 (opens in a new tab)
- github.com/nodemailer/nodemailer/releases/tag/v10.4.1 (opens in a new tab)
- github.com/nodemailer/nodemailer/security/advisories/GHSA-3q53-mvfw-q9v8 (opens in a new tab)
- vulncheck.com/advisories/nodemailer-3.0.0-before-10.4.1-recipient-allow-list-bypass-via-addressparser (opens in a new tab)