Cross-Site Scripting via Authentication Endpoint Error Message in Multiple WSO2 Products
Summary
| CVE | CVE-2026-11854 |
|---|---|
| State | PUBLISHED |
| Assigner | WSO2 |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-28 20:17:22 UTC |
| Updated | 2026-10-29 04:18:35 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 6.1 MEDIUM from ed10eef1-636d-4fbe-9993-6890dfa878f8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Problem Types: CWE-79 | CWE-79 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | ed10eef1-636d-4fbe-9993-6890dfa878f8 | Secondary | 6.1 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| 3.1 | CNA | CVSS | 6.1 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
RequiredScope
ChangedConfidentiality
LowIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | WSO2 | WSO2 API Manager | unknown 3.2.0 custom | Not specified |
| CNA | WSO2 | WSO2 API Manager | affected 3.2.0 3.2.0.480 custom | Not specified |
| CNA | WSO2 | WSO2 API Manager | affected 3.2.1 3.2.1.99 custom | Not specified |
| CNA | WSO2 | WSO2 API Manager | affected 4.1.0 4.1.0.265 custom | Not specified |
| CNA | WSO2 | WSO2 API Manager | affected 4.2.0 4.2.0.205 custom | Not specified |
| CNA | WSO2 | WSO2 API Manager | affected 4.3.0 4.3.0.117 custom | Not specified |
| CNA | WSO2 | WSO2 API Manager | affected 4.4.0 4.4.0.80 custom | Not specified |
| CNA | WSO2 | WSO2 API Manager | affected 4.5.0 4.5.0.65 custom | Not specified |
| CNA | WSO2 | WSO2 API Manager | affected 4.6.0 4.6.0.29 custom | Not specified |
| CNA | WSO2 | WSO2 API Manager | affected 4.7.0 4.7.0.1 custom | Not specified |
| CNA | WSO2 | WSO2 API Control Plane | unknown 4.5.0 custom | Not specified |
| CNA | WSO2 | WSO2 API Control Plane | affected 4.5.0 4.5.0.66 custom | Not specified |
| CNA | WSO2 | WSO2 API Control Plane | affected 4.6.0 4.6.0.30 custom | Not specified |
| CNA | WSO2 | WSO2 API Control Plane | affected 4.7.0 4.7.0.1 custom | Not specified |
| CNA | WSO2 | WSO2 Identity Server | unknown 5.10.0 custom | Not specified |
| CNA | WSO2 | WSO2 Identity Server | affected 5.10.0 5.10.0.399 custom | Not specified |
| CNA | WSO2 | WSO2 Identity Server | affected 5.11.0 5.11.0.446 custom | Not specified |
| CNA | WSO2 | WSO2 Identity Server | affected 6.0.0 6.0.0.272 custom | Not specified |
| CNA | WSO2 | WSO2 Identity Server | affected 6.1.0 6.1.0.274 custom | Not specified |
| CNA | WSO2 | WSO2 Identity Server | affected 7.0.0 7.0.0.155 custom | Not specified |
| CNA | WSO2 | WSO2 Identity Server | affected 7.1.0 7.1.0.65 custom | Not specified |
| CNA | WSO2 | WSO2 Identity Server | affected 7.2.0 7.2.0.26 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO... | ed10eef1-636d-4fbe-9993-6890dfa878f8 | security.docs.wso2.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
Solutions
CNA: Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4850/#solution
There are currently no legacy QID mappings associated with this CVE.