SB20260930103 - Inefficient Algorithmic Complexity in nodemailer

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Main Vulnerability Database SB20260930103

SB20260930103 - Inefficient Algorithmic Complexity in nodemailer

Published: September 30, 2026 Updated: September 30, 2026

Security Bulletin ID SB20260930103
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Inefficient Algorithmic Complexity (CVE-ID: CVE-2026-90776)

CWE-ID: CWE-407 - Inefficient Algorithmic Complexity

CVSSv4: 8.7 [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]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to inefficient algorithmic complexity in the addressparser component when parsing crafted comment-joined email addresses. A remote attacker can send a specially crafted email to cause a denial of service.

The issue is reachable through mailparser processing inbound To, From, or Cc headers.


Remediation

Install update from vendor's website.

References