CVE-2026-106072: medium-severity vulnerability in nodejs node
Published · Updated
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33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 6.7epss 0.6%
from disclosure to weaponsame day
Published on NVDOct 23
1st PoCOct 23
A flaw in Node.js TLS hostname verification allows a certificate with only a DNS SAN to authenticate an IP endpoint when the client connects using a non-canonical IPv4 spelling, such as `0177.0.0.1`, `0x7f.0.0.1`, `2130706433` or `127.1`.
`tls.checkServerIdentity()` did not classify these hosts as IP addresses, but normalized them to their canonical form and matched the result against the certificate DNS names. A certificate containing `DNS:127.0.0.1` and no `IP Address:127.0.0.1` SAN was therefore accepted, while the same certificate is correctly rejected for `127.0.0.1`. Exploitation requires a certificate with a numeric DNS SAN issued by a CA trusted by the client, and a platform resolver that accepts these spellings, such as glibc.
This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L
Affected products
nodejs · nodepublic PoCs found — 4
githubgithub.com/CompleTetech-Security/node-cve-2026-106072-check★ 0githubgithub.com/CompleteTech-LLC/node-cve-2026-106072-check★ 0githubgithub.com/CompleTech-Security/node-cve-2026-106072-check★ 0githubgithub.com/CompleteTech-Security/node-cve-2026-106072-check★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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