CVE-2026-11854 - Vulnerability Details

- Cross-Site Scripting via Authentication Endpoint Error Message in Multiple WSO2 Products

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.

Published: 2026-10-28

Score: 6.1 Medium

EPSS: n/a

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

WSO2

WSO2 API Manager

unaffected

Version	Status	Constraints
`0`	unknown	< 3.2.0
`3.2.0`	affected	< 3.2.0.480
`3.2.1`	affected	< 3.2.1.99
`4.1.0`	affected	< 4.1.0.265
`4.2.0`	affected	< 4.2.0.205
`4.3.0`	affected	< 4.3.0.117
`4.4.0`	affected	< 4.4.0.80
`4.5.0`	affected	< 4.5.0.65
`4.6.0`	affected	< 4.6.0.29
`4.7.0`	affected	< 4.7.0.1

WSO2

WSO2 API Control Plane

unaffected

Version	Status	Constraints
`0`	unknown	< 4.5.0
`4.5.0`	affected	< 4.5.0.66
`4.6.0`	affected	< 4.6.0.30
`4.7.0`	affected	< 4.7.0.1

WSO2

WSO2 Identity Server

unaffected

Version	Status	Constraints
`0`	unknown	< 5.10.0
`5.10.0`	affected	< 5.10.0.399
`5.11.0`	affected	< 5.11.0.446
`6.0.0`	affected	< 6.0.0.272
`6.1.0`	affected	< 6.1.0.274
`7.0.0`	affected	< 7.0.0.155
`7.1.0`	affected	< 7.1.0.65
`7.2.0`	affected	< 7.2.0.26

No data.

Vendor Product Confidence Versions

Wso2

Api Control Plane

100%

Version	Status	Scheme	Platform
`[4.5.0,4.5.0.66)`	affected	generic	—
`[4.6.0,4.6.0.30)`	affected	generic	—
`[4.7.0,4.7.0.1)`	affected	generic	—

Wso2

Api Manager

100%

Version	Status	Scheme	Platform
`[3.2.0,3.2.0.480)`	affected	generic	—
`[3.2.1,3.2.1.99)`	affected	generic	—
`[4.1.0,4.1.0.265)`	affected	generic	—
`[4.2.0,4.2.0.205)`	affected	generic	—
`[4.3.0,4.3.0.117)`	affected	generic	—
`[4.4.0,4.4.0.80)`	affected	generic	—
`[4.5.0,4.5.0.65)`	affected	generic	—
`[4.6.0,4.6.0.29)`	affected	generic	—
`[4.7.0,4.7.0.1)`	affected	generic	—

Wso2

Identity Server

100%

Version	Status	Scheme	Platform
`[5.10.0,5.10.0.399)`	affected	generic	—
`[5.11.0,5.11.0.446)`	affected	generic	—
`[6.0.0,6.0.0.272)`	affected	generic	—
`[6.1.0,6.1.0.274)`	affected	generic	—
`[7.0.0,7.0.0.155)`	affected	generic	—
`[7.1.0,7.1.0.65)`	affected	generic	—
`[7.2.0,7.2.0.26)`	affected	generic	—

Wso2

Wso2 Api Control Plane

100%

Version	Status	Scheme	Platform
`[4.5.0,4.5.0.66)`	affected	generic	—
`[4.6.0,4.6.0.30)`	affected	generic	—
`[4.7.0,4.7.0.1)`	affected	generic	—

Wso2

Wso2 Api Manager

100%

Version	Status	Scheme	Platform
`[3.2.0,3.2.0.480)`	affected	generic	—
`[3.2.1,3.2.1.99)`	affected	generic	—
`[4.1.0,4.1.0.265)`	affected	generic	—
`[4.2.0,4.2.0.205)`	affected	generic	—
`[4.3.0,4.3.0.117)`	affected	generic	—
`[4.4.0,4.4.0.80)`	affected	generic	—
`[4.5.0,4.5.0.65)`	affected	generic	—
`[4.6.0,4.6.0.29)`	affected	generic	—
`[4.7.0,4.7.0.1)`	affected	generic	—

Wso2

Wso2 Identity Server

100%

Version	Status	Scheme	Platform
`[5.10.0,5.10.0.399)`	affected	generic	—
`[5.11.0,5.11.0.446)`	affected	generic	—
`[6.0.0,6.0.0.272)`	affected	generic	—
`[6.1.0,6.1.0.274)`	affected	generic	—
`[7.0.0,7.0.0.155)`	affected	generic	—
`[7.1.0,7.1.0.65)`	affected	generic	—
`[7.2.0,7.2.0.26)`	affected	generic	—

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Remediation

Vendor Solution

Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4850/#solution

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4850/

History

Wed, 28 Oct 2026 21:00:00 +0000

Type	Values Removed	Values Added
First Time appeared		Wso2 Wso2 api Control Plane Wso2 api Manager Wso2 identity Server Wso2 wso2 Api Control Plane Wso2 wso2 Api Manager Wso2 wso2 Identity Server
Vendors & Products		Wso2 Wso2 api Control Plane Wso2 api Manager Wso2 identity Server Wso2 wso2 Api Control Plane Wso2 wso2 Api Manager Wso2 wso2 Identity Server

Wed, 28 Oct 2026 19:30:00 +0000

Type	Values Removed	Values Added
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.
Title		Cross-Site Scripting via Authentication Endpoint Error Message in Multiple WSO2 Products
Weaknesses		CWE-79
References		https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4850/
Metrics		cvssV3_1 `{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}`

Subscriptions

Wso2 Api Control Plane Api Manager Identity Server Wso2 Api Control Plane Wso2 Api Manager Wso2 Identity Server

MITRE

Status: PUBLISHED

Assigner: WSO2

Published: 2026-10-28T19:21:33.216Z

Updated: 2026-10-28T19:21:33.216Z

Reserved: 2026-06-10T08:38:33.407Z

Link: CVE-2026-11854

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-10-28T20:17:22.883

Modified: 2026-10-28T20:17:22.883

Link: CVE-2026-11854

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-10-28T20:45:15Z

Weaknesses

CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

Subscriptions

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