High
Nodemailer before 10.0.2 Stack Exhaustion via Nested Recipient Arrays
Type: advisorySources: OSV
Nodemailer before 10.0.2 fails to properly flatten deeply nested arrays in recipient fields such as to, cc, and bcc, allowing attackers to cause stack exhaustion. Attackers can supply a deeply nested JSON recipient array that triggers recursive Array.toString() conversion, exhausting the call stack and terminating the Node.js process.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-100702
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 02:42 UTC · Revision 1
Source evidence
Nodemailer before 10.0.2 Stack Exhaustion via Nested Recipient Arrays
core-osv · Original sourcePublished 26 Sept 2026, 13:23 UTC
Nodemailer before 10.0.2 fails to properly flatten deeply nested arrays in recipient fields such as to, cc, and bcc, allowing attackers to cause stack exhaustion. Attackers can supply a deeply nested JSON recipient array that triggers recursive Array.toString() conversion, exhausting the call stack and terminating the Node.js process.
osv:CVE-2026-100702
Complete source record
{
"id": "17112861ebcd70d16e90d74cbdce386e396a334cb348d2e441bc9a94b61d1ac1",
"url": "https://osv.dev/vulnerability/CVE-2026-100702",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Nodemailer before 10.0.2 Stack Exhaustion via Nested Recipient Arrays",
"summary": "Nodemailer before 10.0.2 fails to properly flatten deeply nested arrays in recipient fields such as to, cc, and bcc, allowing attackers to cause stack exhaustion. Attackers can supply a deeply nested JSON recipient array that triggers recursive Array.toString() conversion, exhausting the call stack and terminating the Node.js process.",
"evidence": "osv:CVE-2026-100702",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-100702",
"aliases": [
"CVE-2026-100702",
"GHSA-8vvx-rff5-p5rq"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/nodemailer/nodemailer",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "01957998adab6c56b3f63c17a39a72a3ff18f3f4"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "10.0.2"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "0"
},
{
"fixed": "10.0.2"
}
],
"source": "DESCRIPTION"
}
]
}
}
],
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100702.json"
}
}
],
"modified": "2026-10-28T02:30:48.973499390Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100702.json",
"https://github.com/nodemailer/nodemailer/security/advisories/GHSA-8vvx-rff5-p5rq",
"https://nvd.nist.gov/vuln/detail/CVE-2026-100702",
"https://www.vulncheck.com/advisories/nodemailer-before-10.0.2-stack-exhaustion-via-nested-recipient-arrays"
],
"provider_metadata": {
"cwe_ids": [
"CWE-674"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100702.json"
}
},
"related_cves": [
{
"value": "CVE-2026-100702",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 517449,
"published_at": "2026-09-26T13:23:57.945+00:00"
}