# CVE-2026-82661

## Summary

- **CVE ID:** CVE-2026-82661
- **Severity:** MEDIUM
- **CVSS Score:** 5.4 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-93
- **Published:** Aug 31, 2026
- **Last Modified:** Sep 2, 2026

## Description

Nodemailer before 8.0.9 fails to sanitize carriage return and line feed characters in list comment fields, allowing attackers to inject arbitrary message headers. An attacker with control over list.*.comment parameters can inject CRLF sequences to create additional headers in generated RFC822 messages, altering mail client behavior and message semantics.

## Affected Products

- nodemailer — nodemailer (0)
- nodemailer — nodemailer (8.0.9)

## References

- [CNA](https://github.com/nodemailer/nodemailer/security/advisories/GHSA-268h-hp4c-crq3)
- [CNA](https://www.vulncheck.com/advisories/nodemailer-crlf-injection-via-list-header-comments)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.19%
- **EPSS Percentile:** 8.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._