CVE-2026-111997 ip-address: Address6 matches a zone identifier in quadratic time ahead of its length limit, allowing a single long string to stall the process
An attacker can cause a denial of service by sending input with many percent characters to the Address6 constructor, leading to high CPU consumption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-111997?
CVE-2026-111997 is a medium-severity denial of service vulnerability in beaugunderson ip-address, published on 18 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-1333
Which versions are affected by CVE-2026-111997?
2 open source packages ship an affected version, including ip-address.
| Package | Affected | Fixed in |
|---|---|---|
ip-address npm | All versions | 10.7.4 |
ip-address npm | All versions | 10.7.4 |
How do I fix CVE-2026-111997?
Upgrade ip-address to 10.7.4 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-111997 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111997 exists.
Sources
Also known as CLEANSTART-2026-TS24569, CLSA-2026-1792486317, CLSA-2026-1792494889, CLSA-2026-1793097494, CLSA-2026-1793098694, CLSA-2026-1793111658 and 12 more.