Vulnerability details
CVE-2026-92596
nodemailer nodemailer
Nodemailer before 9.1.0 Denial of Service via addressparser
CVSS 4.0
8.7High
Official description
Nodemailer before 9.1.0 contains a quadratic time complexity vulnerability in the addressparser component that allows remote attackers to cause denial of service by supplying a crafted comma-separated address list. Attackers can send a single email with a large number of addresses to block the Node.js event loop for extended periods, consuming 100% CPU and freezing the process.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.7High | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| nodemailer | nodemailer | v < 9.1.0 | CVEProject cvelistV5 (CNA) |
References and advisories
6- https://github.com/nodemailer/nodemailer/commit/9116da9 patch
- https://github.com/nodemailer/nodemailer/commit/7cc38af patch
- https://github.com/nodemailer/nodemailer/commit/34da642 patch
- https://github.com/nodemailer/nodemailer/commit/83b8c48 patch
- https://www.vulncheck.com/advisories/nodemailer-before-9.1.0-denial-of-service-via-addressparser third-party-advisory
- https://github.com/nodemailer/nodemailer/security/advisories/GHSA-2x7j-588g-ccc2 vendor-advisory
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Details
- Published
- 2026-09-17
- Last updated
- 2026-09-17
- State
- Published
- Assigner (CNA)
- VulnCheck
Exploit prediction (EPSS)
0.82%
Probability of exploitation in 30 days
57.5%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Proof of concept
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-400Uncontrolled Resource Consumption