nodemailer before 6.9.9 ReDoS via attachDataUrls parameter
Priority HIGH 70CWE-1333Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-1333.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00418 36th percentileScored 2026-11-07
Fix Fixed nodemailer (nodemailer): 6.9.9
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| nodemailer | nodemailer | before 6.9.9 | 6.9.9 | Patch available | CNA |
- nodemailer Vendornodemailer Affected before 6.9.9 Fixed in 6.9.9 Patch available CNA
Remediation
- Fix · CNA nodemailer (nodemailer) Fixed in 6.9.9
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 4 products
- Red Hat Developer Hub 1
- Red Hat Enterprise Linux 10
- Red Hat Hardened Images
- Self-service automation portal 2
Timeline
- 2026-10-02 Threatist record created from CVE-2024-58379
- 2026-10-03 Alias added: GHSA-7mr3-4pph-3qpg
- 2026-10-27 Affected versions changed · Red Hat
References
More nodemailer vulnerabilities
- TI-2026-74559 ReDoS in Nodemailer SMTP AUTH mechanism detection regexes CVSS 4.0HIGH 8.7
- TI-2026-64856 nodemailer before 10.0.6 Denial of Service via addressparser CVSS 4.0HIGH 8.7
- TI-2026-62452 Nodemailer before 9.1.0 Denial of Service via addressparser CVSS 4.0HIGH 8.7
- TI-2026-61683 Nodemailer 9.1.0 through 10.0.4 Denial of Service via Quadratic Address Parsing CVSS 4.0HIGH 8.7
- TI-2025-13566 Nodemailer: nodemailer: denial of service via crafted email address header CVSS 3.1HIGH 7.5
- TI-2026-74560 Nodemailer address parser passes illegal characters to SMTP envelope CVSS 4.0MEDIUM 6.9
Sources
- CVE-2024-58379 · CVE Program
- CVE-2024-58379 · NVD
- FIRST EPSS
- GHSA-7mr3-4pph-3qpg · GitHub Advisory Database · CC BY 4.0
- CVE-2024-58379 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences