Critical (9.8) in apache shiro. EPSS 26% chance of exploitation in the next 30 days. Fixed in org.apache.shiro:shiro-core 1.9.1.
Apache Shiro before 1.9.1, A RegexRequestMatcher can be misconfigured to be bypassed on some servlet containers. Applications using RegExPatternMatcher with `.` in the regular expression are possibly vulnerable to an authorization bypass.
Severity
CVSS 3.1
9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
26% chance of exploitation in the next 30 days; higher than 97% of CVEs (scores of 2026-10-31)