CVE-2026-125755: nodemailer · Interpretation Conflict
Affects nodemailerSource CVE Database V5
Not known to be exploited · CVSS 8.3 High : upgrade to 10.4.1 soon.
Data as of 10 Nov 2026, 15:34 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 10 Nov 2026.
What to do
Upgrade nodemailer to 10.4.1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| nodemailernodemailer | Affected
| Fixed in
|
npmnodemailerpkg:npm/nodemailerOther 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
Users should upgrade Nodemailer to version 10.4.1 or later, where this address parsing flaw has been fixed. No other mitigation steps are indicated by the vendor advisory or data provided.
Description
Nodemailer versions from 3.0.0 up to but not including 10.4.1 contain an address parsing flaw in the addressparser component. This flaw causes domains to be truncated at folding whitespace or comments before a dot, which can allow attackers to bypass recipient domain restrictions. By crafting to, cc, bcc, or replyTo addresses that appear valid under RFC 5322 domain checks, attackers can cause mail to be delivered to an attacker-controlled address while preserving the application's sender identity. This vulnerability has a high severity score of 8.3 and was fixed in version 10.4.1.
References
- github.com/nodemailer/nodemailer/security/advisories/GHSA-3q53-mvfw-q9v8 (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/blob/3b5cf1eec32c81f287870c8a1c9c09640062cfd5/src/addressparser/index.ts (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)