Riskcovery

CVE-2026-101913

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

State
Published
Severity
6.3 Medium
Published
Sep 28, 2026
Updated
Sep 28, 2026
Reserved
Sep 28, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
4.06.3 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:NGitHub_M

Weaknesses

  • CWE-697 Incorrect Comparison
  • CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

ProductVersions
ip-addressbeaugunderson
  • < 10.5.1Affected

References

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