nodemailer before 6.9.9 contains a regular expression denial of service vulnerability in email parsing when attachDataUrls parameter is set or processing embedded file attachments. Attackers can send specially crafted emails with malicious data URLs or embedded attachments to cause the event loop to hang and deny service.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
nodemailer nodemailer unaffected
Version Status Constraints
0 affected < 6.9.9
6.9.9 unaffected —

No data.

No data.

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Project Subscriptions

Vendors Products
Nodemailer Subscribe
Nodemailer Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/nodemailer/nodemailer/security/advisories/GHSA-9h6g-pr28-7cqp cve-icon cve-icon
https://www.vulncheck.com/advisories/nodemailer-before-6.9.9-redos-via-attachdataurls-parameter cve-icon cve-icon
History

Mon, 31 Aug 2026 09:00:00 +0000

Type Values Removed Values Added
Description nodemailer before 6.9.9 contains a regular expression denial of service vulnerability in email parsing when attachDataUrls parameter is set or processing embedded file attachments. Attackers can send specially crafted emails with malicious data URLs or embedded attachments to cause the event loop to hang and deny service.
Title nodemailer before 6.9.9 ReDoS via attachDataUrls parameter
First Time appeared Nodemailer
Nodemailer nodemailer
Weaknesses CWE-1333
CPEs cpe:2.3:a:nodemailer:nodemailer:*:*:*:*:*:*:*:*
Vendors & Products Nodemailer
Nodemailer nodemailer
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-31T08:46:24.228Z

Reserved: 2026-08-16T13:02:14.690Z

Link: CVE-2024-58379

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-31T09:16:59.387

Modified: 2026-08-31T09:16:59.387

Link: CVE-2024-58379

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses