CVE-2026-56091

Summary

When using Apache Shiro with the shiro-guice module in a web servlet context, a specially crafted HTTP request may cause an authentication bypass. This vulnerability is similar to https://www.cve.org/CVERecord?id=CVE-2020-1957 https://www.cve.org/CVERecord , except that it affects the shiro-guice module instead of the shiro-spring module.

This issue affects all Apache Shiro versions through 2.x, and 3.0.0-alpha-1 only when using shiro-guice module in a web servlet context.

Upgrade to version 3.0.0 or later, which fixes the issue.

Affected Software

VendorProductVersion RangeStatus
Apache Software FoundationApache Shiro0 <= 2.99.99affected
Apache Software FoundationApache Shiro3.0.0-alpha-0 <= 3.0.0-alpha-1affected

Weaknesses

  • CWE-289: CWE-289 Authentication Bypass by Alternate Name

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References