Critical
nodejs — security advisory
A flaw in Node.js TLS hostname handling can cause Embedded-nul hostnames can lead to silent authority rebinding due to c-string truncation in resolver bindings. This vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.
- Products
- nodejs
- Affected versions
- 0.10.15~dfsg1-4, 0.10.21~dfsg1-1, 0.10.22~dfsg1-2, 0.10.23~dfsg1-1, 0.10.23~dfsg1-2, 0.10.23~dfsg1-3, 0.10.24~dfsg1-1, 0.10.25~dfsg2-2, 0.10.25~dfsg2-2ubuntu1, 0.10.25~dfsg2-2ubuntu1.2, 0.10.25~dfsg2-2ubuntu1.2+esm1, 0.10.25~dfsg2-2ubuntu1.2+esm2, 10.15.2~dfsg-2ubuntu1, 10.17.0~dfsg-2ubuntu4, 10.17.0~dfsg-2ubuntu6, 10.19.0~dfsg-3ubuntu1, 10.19.0~dfsg-3ubuntu1.1, 10.19.0~dfsg-3ubuntu1.2, 10.19.0~dfsg-3ubuntu1.3, 10.19.0~dfsg-3ubuntu1.5, 10.19.0~dfsg-3ubuntu1.6, 10.19.0~dfsg-3ubuntu1.6+esm2, 12.22.5~dfsg-5ubuntu1, 12.22.7~dfsg-2ubuntu1, 12.22.7~dfsg-2ubuntu3, 12.22.9~dfsg-1ubuntu2, 12.22.9~dfsg-1ubuntu3, 12.22.9~dfsg-1ubuntu3.1, 12.22.9~dfsg-1ubuntu3.2, 12.22.9~dfsg-1ubuntu3.3, 12.22.9~dfsg-1ubuntu3.4, 12.22.9~dfsg-1ubuntu3.5, 12.22.9~dfsg-1ubuntu3.6, 12.22.9~dfsg-1ubuntu3.6+esm2, 18.13.0+dfsg1-1ubuntu2, 18.19.1+dfsg-2ubuntu4, 18.19.1+dfsg-6ubuntu1, 18.19.1+dfsg-6ubuntu2, 18.19.1+dfsg-6ubuntu5, 20.18.1+dfsg-1ubuntu2, 20.19.2+dfsg-1, 20.19.4+dfsg-1, 20.19.5+dfsg+~cs20.19.12-4, 22.21.1+dfsg+~cs22.19.0-6ubuntu4, 22.22.0+dfsg+~cs22.19.13-2ubuntu1, 22.22.0+dfsg+~cs22.19.6-1ubuntu2, 22.22.1+dfsg+~cs22.19.15-1ubuntu1, 24.16.0+dfsg+~cs24.13.1-2ubuntu1, 24.18.0+dfsg+~cs24.13.2-1ubuntu1, 24.19.0+dfsg+~cs24.13.3-1ubuntu1, 4.2.2~dfsg-1, 4.2.3~dfsg-1, 4.2.4~dfsg-1ubuntu1, 4.2.4~dfsg-2, 4.2.6~dfsg-1ubuntu1, 4.2.6~dfsg-1ubuntu4, 4.2.6~dfsg-1ubuntu4.1, 4.2.6~dfsg-1ubuntu4.2, 4.2.6~dfsg-1ubuntu4.2+esm1, 4.2.6~dfsg-1ubuntu4.2+esm2, 4.2.6~dfsg-1ubuntu4.2+esm3, 6.11.4~dfsg-1ubuntu1, 6.11.4~dfsg-1ubuntu2, 6.12.0~dfsg-1ubuntu1, 6.12.0~dfsg-2ubuntu1, 6.12.0~dfsg-2ubuntu2, 8.10.0~dfsg-2, 8.10.0~dfsg-2ubuntu0.2, 8.10.0~dfsg-2ubuntu0.3, 8.10.0~dfsg-2ubuntu0.4, 8.10.0~dfsg-2ubuntu0.4+esm1, 8.10.0~dfsg-2ubuntu0.4+esm2, 8.10.0~dfsg-2ubuntu0.4+esm3, 8.10.0~dfsg-2ubuntu0.4+esm4, 8.10.0~dfsg-2ubuntu0.4+esm5, 8.10.0~dfsg-2ubuntu0.4+esm6
- Fixed versions
- Not specified
- CVEs
- CVE-2026-48930
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:50 UTC · Revision 1
Source evidence
A flaw in Node.js TLS hostname handling can cause Embedded-nul hostnames can lead to silent authority rebinding due to c-string truncation in resolver bindings. This vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.
osv:UBUNTU-CVE-2026-48930
nodejs
Fixed versions: Not specified
nodejs
Fixed versions: Not specified
nodejs
Fixed versions: Not specified
nodejs
Fixed versions: Not specified
nodejs
Fixed versions: Not specified
nodejs
Fixed versions: Not specified
nodejs
Fixed versions: Not specified
nodejs
Fixed versions: Not specified
nodejs
Fixed versions: Not specified
Complete source record
{
"id": "36a7f502fe5d20bfd1b451be523e0a0a39efbbd37a4fb497a930e535936603f6",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-48930",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-48930",
"summary": "A flaw in Node.js TLS hostname handling can cause Embedded-nul hostnames can lead to silent authority rebinding due to c-string truncation in resolver bindings. This vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.",
"evidence": "osv:UBUNTU-CVE-2026-48930",
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"aliases": [
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],
"modified": "2026-10-17T12:56:06.720090138Z",
"provider": "osv",
"upstream": [
"CVE-2026-48930"
],
"references": [
"https://ubuntu.com/security/CVE-2026-48930",
"https://www.cve.org/CVERecord?id=CVE-2026-48930",
"https://nodejs.org/en/blog/vulnerability/june-2026-security-releases#embedded-nul-hostnames-can-lead-to-silent-authority-rebinding-due-to-c-string-truncation-in-resolver-bindings-cve-2026-48930---medium"
]
},
"related_cves": [
{
"value": "CVE-2026-48930",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 354834,
"published_at": "2026-06-26T02:16:00+00:00"
}