CVE-2026-11854
Full vulnerability record from the local CVENow database.
Description
The authentication endpoint generates an error message that includes reflected data directly from the request without sufficient sanitization or encoding. This allows an attacker to inject malicious scripts that can be executed in the context of a victim's browser. Successful exploitation enables an attacker to perform actions within the user's browser, such as redirecting the user to a malicious website, modifying the web page's user interface, or retrieving information. However, due to the httpOnly flag on session-related cookies, session hijacking or similar attacks are not possible.
Severity
MEDIUM
CVSS score
6.1
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
ed10eef1-636d-4fbe-9993-6890dfa878f8
Published
2026-10-28 20:17:22.883000
Last modified
2026-10-29 16:08:42.827000
View original CVE JSON
{
"id": "CVE-2026-11854",
"sourceIdentifier": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
"published": "2026-10-28T20:17:22.883",
"lastModified": "2026-10-29T16:08:42.827",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The authentication endpoint generates an error message that includes reflected data directly from the request without sufficient sanitization or encoding. This allows an attacker to inject malicious scripts that can be executed in the context of a victim's browser.\n\nSuccessful exploitation enables an attacker to perform actions within the user's browser, such as redirecting the user to a malicious website, modifying the web page's user interface, or retrieving information. However, due to the httpOnly flag on session-related cookies, session hijacking or similar attacks are not possible."
}
],
"affected": [
{
"source": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
"affectedData": [
{
"vendor": "WSO2",
"product": "WSO2 API Manager",
"defaultStatus": "unaffected",
"versions": [
{
"version": "0",
"lessThan": "3.2.0",
"versionType": "custom",
"status": "unknown"
},
{
"version": "3.2.0",
"lessThan": "3.2.0.480",
"versionType": "custom",
"status": "affected"
},
{
"version": "3.2.1",
"lessThan": "3.2.1.99",
"versionType": "custom",
"status": "affected"
},
{
"version": "4.1.0",
"lessThan": "4.1.0.265",
"versionType": "custom",
"status": "affected"
},
{
"version": "4.2.0",
"lessThan": "4.2.0.205",
"versionType": "custom",
"status": "affected"
},
{
"version": "4.3.0",
"lessThan": "4.3.0.117",
"versionType": "custom",
"status": "affected"
},
{
"version": "4.4.0",
"lessThan": "4.4.0.80",
"versionType": "custom",
"status": "affected"
},
{
"version": "4.5.0",
"lessThan": "4.5.0.65",
"versionType": "custom",
"status": "affected"
},
{
"version": "4.6.0",
"lessThan": "4.6.0.29",
"versionType": "custom",
"status": "affected"
},
{
"version": "4.7.0",
"lessThan": "4.7.0.1",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "WSO2",
"product": "WSO2 API Control Plane",
"defaultStatus": "unaffected",
"versions": [
{
"version": "0",
"lessThan": "4.5.0",
"versionType": "custom",
"status": "unknown"
},
{
"version": "4.5.0",
"lessThan": "4.5.0.66",
"versionType": "custom",
"status": "affected"
},
{
"version": "4.6.0",
"lessThan": "4.6.0.30",
"versionType": "custom",
"status": "affected"
},
{
"version": "4.7.0",
"lessThan": "4.7.0.1",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "WSO2",
"product": "WSO2 Identity Server",
"defaultStatus": "unaffected",
"versions": [
{
"version": "0",
"lessThan": "5.10.0",
"versionType": "custom",
"status": "unknown"
},
{
"version": "5.10.0",
"lessThan": "5.10.0.399",
"versionType": "custom",
"status": "affected"
},
{
"version": "5.11.0",
"lessThan": "5.11.0.446",
"versionType": "custom",
"status": "affected"
},
{
"version": "6.0.0",
"lessThan": "6.0.0.272",
"versionType": "custom",
"status": "affected"
},
{
"version": "6.1.0",
"lessThan": "6.1.0.274",
"versionType": "custom",
"status": "affected"
},
{
"version": "7.0.0",
"lessThan": "7.0.0.155",
"versionType": "custom",
"status": "affected"
},
{
"version": "7.1.0",
"lessThan": "7.1.0.65",
"versionType": "custom",
"status": "affected"
},
{
"version": "7.2.0",
"lessThan": "7.2.0.26",
"versionType": "custom",
"status": "affected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "REQUIRED",
"scope": "CHANGED",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"availabilityImpact": "NONE"
},
"exploitabilityScore": 2.8,
"impactScore": 2.7
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-10-29T01:51:55.296399Z",
"id": "CVE-2026-11854",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-79"
}
]
}
],
"references": [
{
"url": "https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4850/",
"source": "ed10eef1-636d-4fbe-9993-6890dfa878f8"
}
]
}