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CVE-2026-101913— ip-address: Address6.isLinkLocal() recognizes fe80::/64 rather than fe80::/10, allowing SSRF and trust-boundary bypass to on-link hosts

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 10.5.1 之前， 中的 方法仅识别 ，而未识别完整的 IPv6 链路本地地址范围。因此，攻击者控制的、位于 范围内的其他地址可能通过依赖 的信任边界检查。同时， 和 方法也将该地址识别为链路本地地址，导致分类结果不一致。成功绕过该检查后，攻击者可能访问到超出预期信任边界的链上主机。此问题已在版本 10.5.1 中得到修复。

CVSS 6.3 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
beaugunderson ip-address < 10.5.1 affected
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I. Basic Information for CVE-2026-101913

Vulnerability Information
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Vulnerability Title
ip-address: Address6.isLinkLocal() recognizes fe80::/64 rather than fe80::/10, allowing SSRF and trust-boundary bypass to on-link hosts
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 10.5.1, the Address6 isLinkLocal method in src/ipv6.ts recognizes only fe80::/64 instead of the complete fe80::/10 IPv6 link-local range. An attacker-controlled address elsewhere in fe80::/10 can therefore pass a trust-boundary check that relies on isLinkLocal. The same address is identified as link-local by getType and getScope, exposing the inconsistent classification. A successful bypass can reach an on-link host outside the intended trust boundary. This issue is fixed in version 10.5.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/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 < 10.5.1 -

II. Public POCs for CVE-2026-101913

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III. Intelligence Information for CVE-2026-101913

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Other References for CVE-2026-101913 (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-2026-101911 6.3 MEDIUM ip-address: Address6 builds a parse diagnostic proportional to the input with no length bo
CVE-2026-101912 6.3 MEDIUM ip-address: isInSubnet() and isHostInSubnet() compare addresses of different families as i

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-101913

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