PT-2026-52220 · Apache · Apache Shiro

Localhost · Published 2026-06-25 · Updated 2026-06-25 · CVE-2026-56091

Mitre

CVSS v4.0

8.2

High

Base vector

AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/S:P/AU:Y/V:D/RE:L/U:Amber

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.

Fix

Weakness Enumeration

CWE-289

Related Identifiers

CVE-2026-56091

Affected Products

Apache Shiro

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-56091 · Security Note
• https://lists.apache.org/thread/onmtxmy2qonbpx7xlw3o34x8sctv47r7 · Vendor Advisory
• https://twitter.com/oss_security/status/2069978740868698138 · Twitter Post