ip-address: no classifier recognizes the NAT64 local-use range 64:ff9b:1::/48, allowing SSRF and trust-boundary bypass
Published Sep 28, 2026
6.9
MEDIUMCVSS 4.0
EPSS 0.39%
Description
ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript. From 10.2.0 until 10.5.1, the Address6 isPrivate classifier in src/ipv6.ts does not recognize the NAT64 local-use range 64:ff9b:1::/48. Applications that combine isPrivate, isLoopback, and isLinkLocal for a trust-boundary decision can treat an internal IPv4 destination encoded through that range as external. Exploitation depends on a server network using an operator-selected NAT64 prefix within the local-use range. A successful bypass can cross the intended network trust boundary. This issue is fixed in version 10.5.1.
Affected products
-
- Version >= 10.2.0, < 10.5.1StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Beaugunderson | IP-Address | n/a |
|
No data.
No data.
Red Hat Hardened Images
grafana12.4
Affected
Red Hat Hardened Images
grafana13.1
Affected
Red Hat Hardened Images
grafana13.2
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Hardened Images | grafana12.4 | Affected | n/a |
| Red Hat Hardened Images | grafana13.1 | Affected | n/a |
| Red Hat Hardened Images | grafana13.2 | Affected | n/a |
ip-address
npm
Introduced 10.2.0 Fixed 10.5.1
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | ip-address | 10.2.0 | 10.5.1 |
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Sep 28, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Not enough EPSS history yet for a chart. At least two recorded scores are needed.
Percentile over time
Not enough EPSS history yet for a chart. At least two recorded scores are needed.
References (8)
- https://access.redhat.com/security/cve/CVE-2026-101910 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2542599 Issue Tracking
- https://github.com/advisories/GHSA-2vr4-cq9g-pvrc Advisory
- https://github.com/beaugunderson/ip-address/commit/ab3dc88bcf5374344168a2ba075ca7ac4ff257f8 x_refsource_MISC
- https://github.com/beaugunderson/ip-address/releases/tag/v10.5.1 x_refsource_MISC
- https://github.com/beaugunderson/ip-address/security/advisories/GHSA-2vr4-cq9g-pvrc exploitx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-101910
- https://www.cve.org/CVERecord?id=CVE-2026-101910
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2026-101910 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2542599 | Issue Tracking | |
| https://github.com/advisories/GHSA-2vr4-cq9g-pvrc | Advisory | |
| https://github.com/beaugunderson/ip-address/commit/ab3dc88bcf5374344168a2ba075ca7ac4ff257f8 | x_refsource_MISC | |
| https://github.com/beaugunderson/ip-address/releases/tag/v10.5.1 | x_refsource_MISC | |
| https://github.com/beaugunderson/ip-address/security/advisories/GHSA-2vr4-cq9g-pvrc | exploitx_refsource_CONFIRM | |
| https://nvd.nist.gov/vuln/detail/CVE-2026-101910 | ||
| https://www.cve.org/CVERecord?id=CVE-2026-101910 |
Change history (0)
No recorded changes yet.