CVE-2026-92597
Description
A flaw was found in Nodemailer. This vulnerability allows a remote attacker to bypass email domain validation due to incorrect parsing of RFC 5322 comments in email addresses. Specifically, a malformed comment can cause Nodemailer to misinterpret the recipient's domain, leading to the delivery of emails to an attacker-controlled domain. This could result in unintended information disclosure or other security impacts.
Statement
Moderate: This flaw in Nodemailer's email address parser can lead to a domain validation bypass. Applications within Red Hat products that utilize Nodemailer for email handling and perform domain validation using a strict RFC 5322 parser without inspecting parse defects, or a naive prefix/substring allow-list, could be induced to deliver emails to an attacker-controlled domain. Exploitation relies on a discrepancy between the application's validation and Nodemailer's parsing of RFC 5322 comments.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.5 | N/A | 6.5 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | High | N/A | High |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | High | N/A | High |
| Integrity Impact | Low | N/A | Low |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
cve.org: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Understanding the Weakness (CWE)
Other
Technical Impact: Varies by Context
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
