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.
Published: 2026-06-25
Score: 8.2 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

A specially crafted HTTP request against Apache Shiro when the shiro-guice module is integrated in a web servlet context can bypass authentication, allowing an attacker to impersonate any user. This flaw is a credential management vulnerability (CWE-289) that undermines confidentiality and integrity of protected resources.

Affected Systems

The vulnerability affects all releases of Apache Shiro through version 2.x and the 3.0.0-alpha-1 release when the shiro-guice module is used within a servlet-based web application.

Risk and Exploitability

The CVSS score of 8.2 reflects a high severity exploitation risk, though no EPSS data is available and the vulnerability is not listed in the CISA KEV catalog. The attack vector is remote via HTTP, requiring only that the application exposes a servlet using shiro-guice. An attacker can craft requests without needing privileged credentials, which makes the exploit straightforward in a reachable web environment.

Generated by OpenCVE AI on June 25, 2026 at 12:01 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade Apache Shiro to version 3.0.0 or later, which contains the necessary fix for shiro-guice in servlet contexts.
  • If an upgrade cannot be performed immediately, remove or comment out the shiro-guice configuration from the servlet deployment descriptor to eliminate the vulnerable entry point.
  • As an interim barrier, restrict network access to the affected servlet endpoints using firewall rules or access control lists until the upgrade or removal is completed.

Generated by OpenCVE AI on June 25, 2026 at 12:01 UTC.

Tracking

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Advisories

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History

Thu, 25 Jun 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache shiro
Vendors & Products Apache
Apache shiro

Thu, 25 Jun 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 25 Jun 2026 09:15:00 +0000

Type Values Removed Values Added
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.
Title Apache Shiro: Authentication bypass in Guice-Web integration
Weaknesses CWE-289
References
Metrics cvssV4_0

{'score': 8.2, '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'}

Subscriptions

Apache Shiro
cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-06-25T12:10:34.365Z

Reserved: 2026-06-18T17:12:37.896Z

Link: CVE-2026-56091

cve-icon Vulnrichment

Updated: 2026-06-25T12:10:19.976Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-25T19:30:15Z

Weaknesses
  • CWE-289

    Authentication Bypass by Alternate Name