What is CVE-2026-40198?

CVE-2026-40198 is a high-severity vulnerability in Stigtsp Net\, classified under CWE-1286. CVSS score: 7.5/10. Published 2026-04-10.

How severe is CVE-2026-40198?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Stigtsp Net\

CVE-2026-40198

Net::CIDR::Lite versions before 0.23 for Perl does not validate IPv6 group count, which may allow IP ACL bypass. _pack_ipv6() does not check that uncompressed IPv6 addresses (without ::) have exactly 8 hex groups. Inputs like "abcd", "1:2…

EPSS: 0.003 (23.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Stigtsp Net\ — versions \
Stigtsp Net::cidr::lite — versions 0

Weakness classification (CWE)

CWE-1286

References

9b29abf9-4ab0-4765-b253-1875cd9b441e (Patch, patch)
9b29abf9-4ab0-4765-b253-1875cd9b441e (release-notes, Release Notes)
9b29abf9-4ab0-4765-b253-1875cd9b441e (related, Third Party Advisory)

Frequently asked questions

What is CVE-2026-40198?: CVE-2026-40198 is a high-severity vulnerability in Stigtsp Net\, classified under CWE-1286. CVSS score: 7.5/10. Published 2026-04-10.
How severe is CVE-2026-40198?: High severity. CVSS v3 base score is 7.5 out of 10.