CVE-2026-56091CWE-289

Apache Shiro: Authentication bypass in Guice-Web integration

High · published June 25, 2026

CVSS v4.0
8.2
EPSS
1%
Percentile
51.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.2 · HIGH
Vector
CVSS:4.0/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
EPSS
0.00669 · 51.4th percentile
Weakness
CWE-289 · Authentication Bypass by Alternate Name
Published
2026-06-25T08:45Z
EPSS history
Timeline
  • 25 JUN 08:45Z
    Apache Shiro: Authentication bypass in Guice-Web integration
    cvelistv5