Node.js up to 22.23.3/24.22.0/26.12.0 TLS Hostname Verification tls.checkServerIdentity certificate validation

Summaryinfo

A vulnerability was found in Node.js up to 22.23.3/24.22.0/26.12.0. It has been declared as problematic. Affected by this issue is the function tls.checkServerIdentity of the component TLS Hostname Verification. Executing a manipulation can lead to certificate validation. This vulnerability appears as CVE-2026-106072. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic was found in Node.js up to 22.23.3/24.22.0/26.12.0. This vulnerability affects the function tls.checkServerIdentity of the component TLS Hostname Verification. The manipulation with an unknown input leads to a certificate validation vulnerability. The CWE definition for the vulnerability is CWE-295. The product does not validate, or incorrectly validates, a certificate. As an impact it is known to affect integrity. CVE summarizes:

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**.

The advisory is available at nodejs.org. This vulnerability was named CVE-2026-106072 since 10/06/2026. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/23/2026). This vulnerability is assigned to T1587.003 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• JavaScript Library

Name

• Node.js

Version

• 22.23.0
• 22.23.1
• 22.23.2
• 22.23.3
• 24.0
• 24.1
• 24.2
• 24.3
• 24.4
• 24.5
• 24.6
• 24.7
• 24.8
• 24.9
• 24.10
• 24.11
• 24.12
• 24.13
• 24.14
• 24.15
• 24.16
• 24.17
• 24.18
• 24.19
• 24.20
• 24.21
• 24.22.0
• 26.0
• 26.1
• 26.2
• 26.3
• 26.4
• 26.5
• 26.6
• 26.7
• 26.8
• 26.9
• 26.10
• 26.11
• 26.12.0

License

• open-source

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CPE 2.2info

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