Apache Shiro: Authentication bypass in Guice-Web integration_CVE-2026-56091

8.2 / 10

HIGH

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

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.

Basic Information

ID CVE-2026-56091

Source apache

Published Jun 25, 2026 at 08:45

Affected Product

Vendor Apache Software Foundation

Product Apache Shiro

Affected Versions Apache Software Foundation Apache Shiro 0
Apache Software Foundation Apache Shiro 3.0.0-alpha-0

CWE Classification

CWE-289

References

lists.apache.org /thread/onmtxmy2qonbpx7xlw3o34x8sctv47r7

{
    "lastseen": "",
    "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.\nThis 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.\n\nThis 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.\n\nUpgrade to version 3.0.0 or later, which fixes the issue.",
    "published": "2026-06-25T08:45:19.426Z",
    "modified": "2026-06-25T08:45:19.426Z",
    "type": "cve",
    "title": "Apache Shiro: Authentication bypass in Guice-Web integration",
    "source": "apache",
    "references": "https://lists.apache.org/thread/onmtxmy2qonbpx7xlw3o34x8sctv47r7",
    "id": "CVE-2026-56091",
    "bulletinFamily": "",
    "cwe": [
        "CWE-289"
    ],
    "cvelist": null,
    "sourceData": "Apache Software Foundation Apache Shiro 0\nApache Software Foundation Apache Shiro 3.0.0-alpha-0",
    "sourceHref": "",
    "cvss": {
        "score": 8.2,
        "severity": "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",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Apache Shiro",
    "version": "0",
    "vendor": "Apache Software Foundation",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}