SB20260824181 - Improper access control in Apache Shiro
Published: August 24, 2026
Security Bulletin ID
SB20260824181
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper access control (CVE-ID: CVE-2026-56091)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to bypass authentication.
The vulnerability exists due to improper access control in the shiro-guice module when handling a specially crafted HTTP request in a web servlet context. A remote attacker can send a specially crafted HTTP request to bypass authentication.
Only deployments using the shiro-guice module in a web servlet context are vulnerable.
Remediation
Install update from vendor's website.