Medium 6.1Published Oct 28, 2026

CVE-2026-11854Cross-Site Scripting via Authentication Endpoint Error Message in Multiple WSO2 Products

Updated under an hour ago (Oct 29, 2026, 6:23 AM ET)

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It affects WSO2 API Manager and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: WSO2
NVD analysis: Received
Record last updated: Oct 28, 2026
First seen by InfoSec Signals: Oct 28, 2026

Affected products

Affected products

WSO2 WSO2 API Manager wso2:api_manager (from the name)	before 3.2.0 status unknown; from 3.2.0 before 3.2.0.480; from 3.2.1 before 3.2.1.99; from 4.1.0 before 4.1.0.265; from 4.2.0 before 4.2.0.205; from 4.3.0 before 4.3.0.117; from 4.4.0 before 4.4.0.80; from 4.5.0 before 4.5.0.65; and 2 more ranges	CNA record
WSO2 WSO2 API Control Plane wso2:api_control_plane (from the name)	before 4.5.0 status unknown; from 4.5.0 before 4.5.0.66; from 4.6.0 before 4.6.0.30; from 4.7.0 before 4.7.0.1	CNA record
WSO2 WSO2 Identity Server wso2:identity_server (from the name)	before 5.10.0 status unknown; from 5.10.0 before 5.10.0.399; from 5.11.0 before 5.11.0.446; from 6.0.0 before 6.0.0.272; from 6.1.0 before 6.1.0.274; from 7.0.0 before 7.0.0.155; from 7.1.0 before 7.1.0.65; from 7.2.0 before 7.2.0.26	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.