Medium severity · published Aug 31, 2026
CVE-2024-58379
nodemailer before 6.9.9 ReDoS via attachDataUrls parameter
5.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NO
nodemailer · nodemailer
before 6.9.9 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-58379
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-58379
github.com
https://github.com/nodemailer/nodemailer/security/advisories/GHSA-9h6g-pr28-7cqp
www.vulncheck.com
https://www.vulncheck.com/advisories/nodemailer-before-6.9.9-redos-via-attachdataurls-parameter
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