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Fencer Vulns
medium 6.3

CVE-2026-111997 json

ip-address: Address6 matches a zone identifier in quadratic time ahead of its length limit, allowing a single long string to stall the process

published 2026-10-18 22 d ago modified 2026-10-22 17 d ago also GHSA-rxp7-6hxx-x8q5 , EUVD-2026-103378

cvss
6.3
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

ip-address before 10.7.4 allows a denial of service (CPU consumption from quadratic complexity, and application stall) via many % characters in input reaching a function call that uses the Address6 constructor.

Patch / fix

  • npm ip-address 10.7.4
  • beaugunderson ip-address 10.7.4
  • node-ip-address Debian 14 10.7.4-1

debian advisories DEBIAN-CVE-2026-111997

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-111997 updated cvss 5.3

ip-address: ip-address: Denial of Service via excessive percent characters in IPv6 address input

  • Red Hat Hardened Images grafana13.1 13.1.7-0.1.hum1, grafana13.2 13.2.3-0.1.hum1, grafana12.4 12.4.12-0.4.hum1
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
22 d ago

Exploit prediction

0.32% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/beaugunderson/ip-address/security/advisories/GHSA-rxp7-6hxx-x8q5 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 6.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CNA 4.0 6.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/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

Affected packages

ecosystem package affected fixed in
npm ip-address
<10.7.4
10.7.4

Affected products

  • beaugunderson ip-address

Classification

Weakness
  • CWE-1333 Inefficient Regular Expression Complexity

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.