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NVD / CVE Program· CNA GitHub_M

CVE-2026-54272: ip-address: Misclassification of IPv4-mapped/NAT64 IPv6 addresses can bypass SSRF and trust-boundary checks

MediumCVSS 6.9 · v4.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 27/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.40% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: beaugunderson ip-address 10.2.1.

Low priority for now. Upgrade to beaugunderson ip-address 10.2.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript. Versions 10.1.1 through 10.2.0 are vulnerable to SSRF through misclassification of IPv4-mapped/NAT64 IPv6 addresses. Address6.getType() classifies an address by matching it against a table of known IPv6 special-use prefixes, returning Global unicast when nothing matches. That table had no entry for the IPv4-mapped range (::ffff:0:0/96), so every mapped address fell through to Global unicast; NAT64 addresses matched their own NAT64 … labels. The boolean checks isLoopback, isUnspecified, and isMulticast compared getType() against a fixed label and so returned false, while isLinkLocal and isULA checked only the native IPv6 ranges. The library already exposed isMapped4() and to4(), but did not apply them inside these checks, so a mapped or NAT64 address was never normalized to its embedded IPv4 address before classification. For IPv4-mapped addresses the host OS routes to the IPv4 stack, so the misclassification is reachable on any dual-stack host. For NAT64, the classification bypass is unconditional but end-to-end reachability additionally requires a NAT64/DNS64 gateway in the deployment network.This issue has been fixed in version 10.2.1.

Published
Jul 27, 2026
Updated
Oct 24, 2026
EPSS
0.4% · 34th percentile

Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
27 / 40 · 6.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
proof of concept
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
6.9
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • beaugunderson ip-address

    • >= 10.1.1, < 10.2.1affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10nodejs24before 1:24.18.0-5.el10_21:24.18.0-5.el10_2
AlmaLinux:10nodejs24-develbefore 1:24.18.0-5.el10_21:24.18.0-5.el10_2
AlmaLinux:10nodejs24-docsbefore 1:24.18.0-5.el10_21:24.18.0-5.el10_2
AlmaLinux:10nodejs24-full-i18nbefore 1:24.18.0-5.el10_21:24.18.0-5.el10_2
AlmaLinux:10nodejs24-libsbefore 1:24.18.0-5.el10_21:24.18.0-5.el10_2
AlmaLinux:10nodejs24-npmbefore 1:11.16.0-1.24.18.0.5.el10_21:11.16.0-1.24.18.0.5.el10_2
AlmaLinux:8nodejsbefore 1:24.18.0-3.module_el8.10.0+4250+09238ed41:24.18.0-3.module_el8.10.0+4250+09238ed4
AlmaLinux:8nodejs-develbefore 1:24.18.0-3.module_el8.10.0+4250+09238ed41:24.18.0-3.module_el8.10.0+4250+09238ed4
AlmaLinux:8nodejs-docsbefore 1:24.18.0-3.module_el8.10.0+4250+09238ed41:24.18.0-3.module_el8.10.0+4250+09238ed4
AlmaLinux:8nodejs-full-i18nbefore 1:24.18.0-3.module_el8.10.0+4250+09238ed41:24.18.0-3.module_el8.10.0+4250+09238ed4
AlmaLinux:8nodejs-libsbefore 1:24.18.0-3.module_el8.10.0+4250+09238ed41:24.18.0-3.module_el8.10.0+4250+09238ed4
AlmaLinux:8nodejs-nodemonbefore 3.1.14-2.module_el8.10.0+4250+09238ed43.1.14-2.module_el8.10.0+4250+09238ed4
AlmaLinux:8nodejs-packagingbefore 2021.06-6.module_el8.10.0+4086+70facd4a2021.06-6.module_el8.10.0+4086+70facd4a
AlmaLinux:8nodejs-packaging-bundlerbefore 2021.06-6.module_el8.10.0+4086+70facd4a2021.06-6.module_el8.10.0+4086+70facd4a
AlmaLinux:8npmbefore 1:11.16.0-1.24.18.0.3.module_el8.10.0+4250+09238ed41:11.16.0-1.24.18.0.3.module_el8.10.0+4250+09238ed4
AlmaLinux:8v8-13.6-develbefore 3:13.6.233.17-1.24.18.0.3.module_el8.10.0+4250+09238ed43:13.6.233.17-1.24.18.0.3.module_el8.10.0+4250+09238ed4
AlmaLinux:9nodejsbefore 1:22.23.1-3.module_el9.8.0+291+0bb98cce1:22.23.1-3.module_el9.8.0+291+0bb98cce
AlmaLinux:9nodejsbefore 1:24.18.0-6.module_el9.8.0+292+f4eaf8b21:24.18.0-6.module_el9.8.0+292+f4eaf8b2
AlmaLinux:9nodejs-develbefore 1:22.23.1-3.module_el9.8.0+291+0bb98cce1:22.23.1-3.module_el9.8.0+291+0bb98cce
AlmaLinux:9nodejs-develbefore 1:24.18.0-6.module_el9.8.0+292+f4eaf8b21:24.18.0-6.module_el9.8.0+292+f4eaf8b2
AlmaLinux:9nodejs-docsbefore 1:22.23.1-3.module_el9.8.0+291+0bb98cce1:22.23.1-3.module_el9.8.0+291+0bb98cce
AlmaLinux:9nodejs-docsbefore 1:24.18.0-6.module_el9.8.0+292+f4eaf8b21:24.18.0-6.module_el9.8.0+292+f4eaf8b2
AlmaLinux:9nodejs-full-i18nbefore 1:24.18.0-6.module_el9.8.0+292+f4eaf8b21:24.18.0-6.module_el9.8.0+292+f4eaf8b2
AlmaLinux:9nodejs-full-i18nbefore 1:22.23.1-3.module_el9.8.0+291+0bb98cce1:22.23.1-3.module_el9.8.0+291+0bb98cce

+96

Same product

beaugunderson: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-69192ip-address: Address4 decodes leading-zero octets as decimal while resolvers decode them as octal, allowing SSRF and trust-boundary bypass
    30Monitor
  • CVE-2026-101910ip-address: no classifier recognizes the NAT64 local-use range 64:ff9b:1::/48, allowing SSRF and trust-boundary bypass
    27Monitor
  • CVE-2026-69198ip-address: a CIDR suffix on the parsed address suppresses special-use classification and can bypass SSRF and trust-boundary checks
    27Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-42338May 12, 2026 · ip-address: XSS in Address6 HTML-emitting methods
    21Monitor
  • Later →CVE-2026-101911Sep 28, 2026 · ip-address: Address6 builds a parse diagnostic proportional to the input with no length bound, allowing a single long string to stall or crash the process
    25Monitor
  • Later →CVE-2026-101912Sep 28, 2026 · ip-address: isInSubnet() and isHostInSubnet() compare addresses of different families as if they shared an address space, allowing an allowlist check to admit…
    25Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
beaugunderson ip-address10.2.1 · descriptionVendor (CNA)
almalinux:nodejs1:24.18.0-3.module_el8.10.0+4250+09238ed4 · AlmaLinux:8Package registry (OSV)
almalinux:nodejs-devel1:24.18.0-3.module_el8.10.0+4250+09238ed4 · AlmaLinux:8Package registry (OSV)
almalinux:nodejs-docs1:24.18.0-3.module_el8.10.0+4250+09238ed4 · AlmaLinux:8Package registry (OSV)
almalinux:nodejs-full-i18n1:24.18.0-3.module_el8.10.0+4250+09238ed4 · AlmaLinux:8Package registry (OSV)
almalinux:nodejs-libs1:24.18.0-3.module_el8.10.0+4250+09238ed4 · AlmaLinux:8Package registry (OSV)
almalinux:nodejs-nodemon3.1.14-2.module_el8.10.0+4250+09238ed4 · AlmaLinux:8Package registry (OSV)
almalinux:nodejs-packaging2021.06-6.module_el8.10.0+4086+70facd4a · AlmaLinux:8Package registry (OSV)
almalinux:nodejs-packaging-bundler2021.06-6.module_el8.10.0+4086+70facd4a · AlmaLinux:8Package registry (OSV)
almalinux:nodejs241:24.18.0-5.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:nodejs24-devel1:24.18.0-5.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:npm1:11.16.0-1.24.18.0.3.module_el8.10.0+4250+09238ed4 · AlmaLinux:8Package registry (OSV)
almalinux:v8-12.4-devel3:12.4.254.21-1.22.23.1.3.module_el9.8.0+291+0bb98cce · AlmaLinux:9Package registry (OSV)
almalinux:v8-13.6-devel3:13.6.233.17-1.24.18.0.3.module_el8.10.0+4250+09238ed4 · AlmaLinux:8Package registry (OSV)
debian:node-ip-address10.3.1-1 · Debian:14Package registry (OSV)
npm:ip-address10.2.1Package registry (OSV)
opensuse:nodejs2222.23.2-160000.1.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:nodejs2424.18.1-160000.1.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:nodejs2424.21.0-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:nodejs2626.7.0-1.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:nodejs1:24.18.0-3.module+el8.10.0+24639+56878497 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:nodejs-debuginfo1:24.18.0-3.module+el8.10.0+24639+56878497 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:nodejs-debugsource1:24.18.0-3.module+el8.10.0+24639+56878497 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:nodejs-devel1:24.18.0-3.module+el8.10.0+24639+56878497 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:nodejs-docs1:24.18.0-3.module+el8.10.0+24639+56878497 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:nodejs-full-i18n1:24.18.0-3.module+el8.10.0+24639+56878497 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:nodejs-libs1:24.18.0-3.module+el8.10.0+24639+56878497 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:nodejs-libs-debuginfo1:24.18.0-3.module+el8.10.0+24639+56878497 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:nodejs-nodemon0:3.1.14-2.module+el8.10.0+24639+56878497 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:nodejs-packaging0:2021.06-6.module+el8.10.0+24562+090c6525 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)

+8

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-691927 days apartip-address: Address4 decodes leading-zero octets as decimal while resolvers decode them as octal, allowing SSRF and trust-boundary bypass
    30Monitor
  • CVE-2026-691987 days apartip-address: a CIDR suffix on the parsed address suppresses special-use classification and can bypass SSRF and trust-boundary checks
    27Monitor

Not on record for this CVE: patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records