Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-101912— ip-address: isInSubnet() and isHostInSubnet() compare addresses of different families as if they shared an address space, allowing an allowlist check to admit an address outside its range

Quick assessment

Affected
beaugunderson ip-address
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

是一个用于在 JavaScript 中解析和操作 IPv4 和 IPv6 地址的库。在版本 10.7.1 之前， 中的 和 方法在比较掩码后的二进制字符串时，未验证两个操作数是否使用相同的 IP 地址族（IP family）。当进行跨地址族的包含关系检查且前导地址位匹配时，即使 IPv4 和 IPv6 并不共享地址空间，掩码后的字符串仍可能比较为相等。因此，基于白名单或黑名单的决策可能错误地将本不在预期范围内的地址判定为包含在内。该问题已在版本 10.7.1 中得到修复。

CVSS 6.3 · Medium

Possible ATT&CK Techniques 1 AI

T1552.004 · Private Keys

Affected Version Matrix 1

VendorProduct Version RangeStatus
beaugunderson ip-address < 10.7.1 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-101912

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
ip-address: isInSubnet() and isHostInSubnet() compare addresses of different families as if they shared an address space, allowing an allowlist check to admit an address outside its range
Source: CVE Program / CVE List V5
Vulnerability Description
ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript. Prior to 10.7.1, the isInSubnet and isHostInSubnet methods in src/common.ts compare masked binary strings without validating that both operands use the same IP family. A cross-family containment check whose leading address bits match makes the masked strings compare equal even though IPv4 and IPv6 do not share an address space. An allowlist or denylist decision can therefore classify an address outside the intended range as contained. This issue is fixed in version 10.7.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的比较
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
beaugunderson ip-address < 10.7.1 -

II. Public POCs for CVE-2026-101912

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-101912

请登录查看更多情报信息。

Other References for CVE-2026-101912 (3)

Same Patch Batch · beaugunderson · 2026-09-28 · 4 CVEs total

CVE-2026-101910 6.9 MEDIUM ip-address: no classifier recognizes the NAT64 local-use range 64:ff9b:1::/48, allowing SS
CVE-2026-101913 6.3 MEDIUM ip-address: Address6.isLinkLocal() recognizes fe80::/64 rather than fe80::/10, allowing SS
CVE-2026-101911 6.3 MEDIUM ip-address: Address6 builds a parse diagnostic proportional to the input with no length bo

IV. Related Vulnerabilities

Same product: ip-address
Same vendor: beaugunderson
Same weakness: CWE-697

V. Comments for CVE-2026-101912

No comments yet

Leave a comment