beaugunderson ip-address up to 10.7.0 IPv6 Parser src/ipv6.ts Address6.isValid improper synchronization

Summaryinfo

A vulnerability, which was classified as problematic, was found in beaugunderson ip-address up to 10.7.0. Affected by this issue is the function Address6.isValid of the file src/ipv6.ts of the component IPv6 Parser. The manipulation results in improper synchronization. This vulnerability is identified as CVE-2026-101911. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in beaugunderson ip-address up to 10.7.0. It has been classified as problematic. Affected is the function Address6.isValid of the file src/ipv6.ts of the component IPv6 Parser. The manipulation with an unknown input leads to a improper synchronization vulnerability. CWE is classifying the issue as CWE-662. The product utilizes multiple threads or processes to allow temporary access to a shared resource that can only be exclusive to one process at a time, but it does not properly synchronize these actions, which might cause simultaneous accesses of this resource by multiple threads or processes. This is going to have an impact on availability. CVE summarizes:

ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript. Prior to 10.7.1, the Address6 constructor, Address6.isValid, and parse code in src/ipv6.ts accept unbounded strings and expand invalid characters through RE_BAD_CHARACTERS into large diagnostics. Material impact occurs only when an application accepts a very large attacker-controlled field and passes it to Address6 parsing without an earlier length bound. Common URL and header limits, and common body-parser defaults, generally constrain the effect; common defaults typically exclude 32 MiB fields. Megabyte-scale fields can cause a synchronous stall and high transient memory use, approximately 16 MiB can trigger an invalid string length exception, and process termination occurs at approximately 32 MiB. The affected entry points include Address6.isValid and construction paths that reach parse. This issue is fixed in version 10.7.1.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-101911 since 09/28/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit.

Upgrading to version 10.7.1 eliminates this vulnerability.

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Productinfo

Vendor

• beaugunderson

Name

• ip-address

Version

• 10.0
• 10.1
• 10.2
• 10.3
• 10.4
• 10.5
• 10.6
• 10.7.0

Website

• Product: https://github.com/beaugunderson/ip-address/

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