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CVE-2026-56091

HIGH
8.2
CVSS 4.0
Description
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.

Metadata

CVE ID
CVE-2026-56091
State
PUBLISHED
Assigner
apache
Reserved
2026-06-18 17:12 UTC
Published
2026-06-25 08:45 UTC
Last updated
2026-06-25 08:45 UTC
Primary CWE
CWE-289
CWE-289 Authentication Bypass by Alternate Name
Vendor / Product
Apache Software Foundation / Apache Shiro
Sources
cve.org  ·  NVD

Severity & Metrics

8.2 HIGH CVSS 4.0
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
Affected products (1)
VendorProductPlatformVersions
Apache Software Foundation Apache Shiro — 0 ≤ 2.99.99, 3.0.0-alpha-0 ≤ 3.0.0-alpha-1
Weakness (CWE)
CWESourceDescription
CWE-289 cna CWE-289 Authentication Bypass by Alternate Name
CVSS scores (1)
ScoreSeverityVersionSourceVector
8.2 HIGH 4.0 cna 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
References (1)
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