CVE-2026-0637

Header Injection via Custom URL Configuration in Multiple WSO2 Products Allows Open Redirect and Log Forgery

Published Aug 6, 2026 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed

Description

When a proxy server is configured with `customUrl.enabled`, the component accepts user-supplied input within forwarded HTTP headers without enforcing expected validation constraints. A malicious actor can manipulate these headers to influence the URL construction process, leading to an open redirect vulnerability. Additionally, unsanitized header values are written to application logs.

An attacker can exploit this to force redirection to arbitrary malicious domains, potentially enabling phishing attacks. Furthermore, they can inject forged entries into application logs, impacting the reliability of security logs and potentially hindering incident investigation.

Affected Products

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	< 3.2.0.464
`3.2.1`	affected	< 3.2.1.83
`4.1.0`	affected	< 4.1.0.249
`4.2.0`	affected	< 4.2.0.189
`4.3.0`	affected	< 4.3.0.99
`4.4.0`	affected	< 4.4.0.63
`4.5.0`	affected	< 4.5.0.44
`4.6.0`	affected	< 4.6.0.12

WSO2

WSO2 API Control Plane

unaffected

Version	Status	Constraints
`0`	unknown	< 4.5.0
`4.5.0`	affected	< 4.5.0.45
`4.6.0`	affected	< 4.6.0.13

Configuration 1 [-]

OR	cpe:2.3:a:wso2:api_control_plane::::::::
	cpe:2.3:a:wso2:api_control_plane::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:api_manager::::::::
	cpe:2.3:a:wso2:identity_server::::::::
	cpe:2.3:a:wso2:identity_server::::::::
	cpe:2.3:a:wso2:identity_server::::::::
	cpe:2.3:a:wso2:identity_server::::::::
	cpe:2.3:a:wso2:identity_server_as_key_manager::::::::
	cpe:2.3:a:wso2:open_banking_am::::::::
	cpe:2.3:a:wso2:open_banking_iam::::::::
	cpe:2.3:a:wso2:traffic_manager::::::::
	cpe:2.3:a:wso2:traffic_manager::::::::
	cpe:2.3:a:wso2:universal_gateway::::::::
	cpe:2.3:a:wso2:universal_gateway::::::::

No data.

Vendor Product Versions

Wso2

Wso2 Api Control Plane

Version	Status	Scheme	Platform
`[0,4.5.0)`	unknown	generic	—
`[4.5.0,4.5.0.50)`	affected	generic	—
`[4.6.0,4.6.0.14)`	affected	generic	—

Wso2

Wso2 Api Manager

Version	Status	Scheme	Platform
`[0,3.1.0)`	unknown	generic	—
`[3.1.0,3.1.0.357)`	affected	generic	—
`[3.2.0,3.2.0.465)`	affected	generic	—
`[3.2.1,3.2.1.84)`	affected	generic	—
`[4.1.0,4.1.0.249)`	affected	generic	—
`[4.2.0,4.2.0.189)`	affected	generic	—
`[4.3.0,4.3.0.100)`	affected	generic	—
`[4.4.0,4.4.0.64)`	affected	generic	—
`[4.5.0,4.5.0.49)`	affected	generic	—
`[4.6.0,4.6.0.13)`	affected	generic	—

Wso2

Wso2 Carbon Event Publisher Core

Version	Status	Scheme	Platform
`[5.2.24,5.2.24.11)`	affected	generic	—
`[5.2.26,5.2.26.24)`	affected	generic	—
`[5.2.27,5.2.27.7)`	affected	generic	—
`[5.2.41,5.2.41.8)`	affected	generic	—
`[5.2.45,5.2.45.2)`	affected	generic	—
`[5.2.50,5.2.50.3)`	affected	generic	—
`[5.2.57,5.2.57.12)`	affected	generic	—
`[5.2.58,5.2.58.3)`	affected	generic	—
`[5.2.61,5.2.61.4)`	affected	generic	—
`[5.2.64,5.2.64.1)`	affected	generic	—
`[5.3.5,5.3.5.10)`	affected	generic	—
`[5.3.11,5.3.11.7)`	affected	generic	—
`[5.3.15,5.3.15.6)`	affected	generic	—
`[5.3.20,5.3.20.3)`	affected	generic	—
`[5.3.27,5.3.27.1)`	affected	generic	—
`[x,*]`	unaffected	generic	—

Wso2

Wso2 Identity Server

Version	Status	Scheme	Platform
`[0,5.10.0)`	unknown	generic	—
`[5.10.0,5.10.0.386)`	affected	generic	—
`[5.11.0,5.11.0.433)`	affected	generic	—
`[6.0.0,6.0.0.260)`	affected	generic	—
`[6.1.0,6.1.0.261)`	affected	generic	—
`[7.0.0,7.0.0.139)`	affected	generic	—
`[7.1.0,7.1.0.47)`	affected	generic	—
`[7.2.0,7.2.0.8)`	affected	generic	—

Wso2

Wso2 Identity Server As Key Manager

Version	Status	Scheme	Platform
`[0,5.10.0)`	unknown	generic	—
`[5.10.0,5.10.0.377)`	affected	generic	—

Wso2

Wso2 Open Banking Am

Version	Status	Scheme	Platform
`[0,2.0.0)`	unknown	generic	—
`[2.0.0,2.0.0.406)`	affected	generic	—

Wso2

Wso2 Open Banking Iam

Version	Status	Scheme	Platform
`[0,2.0.0)`	unknown	generic	—
`[2.0.0,2.0.0.426)`	affected	generic	—

Wso2

Wso2 Traffic Manager

Version	Status	Scheme	Platform
`[0,4.5.0)`	unknown	generic	—
`[4.5.0,4.5.0.48)`	affected	generic	—
`[4.6.0,4.6.0.13)`	affected	generic	—

Wso2

Wso2 Universal Gateway

Version	Status	Scheme	Platform
`[0,4.5.0)`	unknown	generic	—
`[4.5.0,4.5.0.49)`	affected	generic	—
`[4.6.0,4.6.0.13)`	affected	generic	—

Remediation

Vendor Solution

Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4829/#solution https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4829/#solution

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

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.

Exploit prediction score: < 1% (0.194% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4829/

History

Nov 4, 2026 2:30 PM Weaknesses updated. References updated View changes

Type	Values Removed	Values Added
Weaknesses	CWE-532
References	https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4897/

Nov 4, 2026 2:00 PM Description updated. Title updated. Weaknesses updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description	When an Event Publisher output adapter is configured with irrelevant properties, the affected products log these properties. This logging occurs without sufficient validation or sanitization of the property values. A malicious actor with access to the 'wso2carbon' log files could retrieve sensitive information, such as user credentials or other confidential data, that was inadvertently logged due to misconfiguration, potentially leading to unauthorized access.	When a proxy server is configured with `customUrl.enabled`, the component accepts user-supplied input within forwarded HTTP headers without enforcing expected validation constraints. A malicious actor can manipulate these headers to influence the URL construction process, leading to an open redirect vulnerability. Additionally, unsanitized header values are written to application logs. An attacker can exploit this to force redirection to arbitrary malicious domains, potentially enabling phishing attacks. Furthermore, they can inject forged entries into application logs, impacting the reliability of security logs and potentially hindering incident investigation.
Title	Sensitive Information Disclosure via Event Publisher Logging in Multiple WSO2 Products	Header Injection via Custom URL Configuration in Multiple WSO2 Products Allows Open Redirect and Log Forgery
Weaknesses		CWE-20 CWE-74
Metrics	cvssV3_1 `{'score': 4.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N'}`	cvssV3_1 `{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'}`

Nov 4, 2026 1:45 PM Added references View changes

Type	Values Removed	Values Added
References		https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4829/

Aug 12, 2026 7:45 PM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Wso2 api Control Plane Wso2 api Manager Wso2 identity Server Wso2 identity Server As Key Manager Wso2 open Banking Am Wso2 open Banking Iam Wso2 traffic Manager Wso2 universal Gateway
CPEs		cpe:2.3:a:wso2:api_control_plane:::::::: cpe:2.3:a:wso2:api_manager:::::::: cpe:2.3:a:wso2:identity_server:::::::: cpe:2.3:a:wso2:identity_server_as_key_manager:::::::: cpe:2.3:a:wso2:open_banking_am:::::::: cpe:2.3:a:wso2:open_banking_iam:::::::: cpe:2.3:a:wso2:traffic_manager:::::::: cpe:2.3:a:wso2:universal_gateway::::::::
Vendors & Products		Wso2 api Control Plane Wso2 api Manager Wso2 identity Server Wso2 identity Server As Key Manager Wso2 open Banking Am Wso2 open Banking Iam Wso2 traffic Manager Wso2 universal Gateway

Aug 7, 2026 10:30 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Wso2 Wso2 wso2 Api Control Plane Wso2 wso2 Api Manager Wso2 wso2 Carbon Event Publisher Core Wso2 wso2 Identity Server Wso2 wso2 Identity Server As Key Manager Wso2 wso2 Open Banking Am Wso2 wso2 Open Banking Iam Wso2 wso2 Traffic Manager Wso2 wso2 Universal Gateway
Vendors & Products		Wso2 Wso2 wso2 Api Control Plane Wso2 wso2 Api Manager Wso2 wso2 Carbon Event Publisher Core Wso2 wso2 Identity Server Wso2 wso2 Identity Server As Key Manager Wso2 wso2 Open Banking Am Wso2 wso2 Open Banking Iam Wso2 wso2 Traffic Manager Wso2 wso2 Universal Gateway

Aug 6, 2026 1:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Aug 6, 2026 8:15 AM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		When an Event Publisher output adapter is configured with irrelevant properties, the affected products log these properties. This logging occurs without sufficient validation or sanitization of the property values. A malicious actor with access to the 'wso2carbon' log files could retrieve sensitive information, such as user credentials or other confidential data, that was inadvertently logged due to misconfiguration, potentially leading to unauthorized access.
Title		Sensitive Information Disclosure via Event Publisher Logging in Multiple WSO2 Products
Weaknesses		CWE-532
References		https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4897/
Metrics		cvssV3_1 `{'score': 4.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N'}`

Earlier changes (2)

Subscriptions

Wso2 Api Control Plane Api Manager Identity Server Identity Server As Key Manager Open Banking Am Open Banking Iam Traffic Manager Universal Gateway Wso2 Api Control Plane Wso2 Api Manager Wso2 Carbon Event Publisher Core Wso2 Identity Server Wso2 Identity Server As Key Manager Wso2 Open Banking Am Wso2 Open Banking Iam Wso2 Traffic Manager Wso2 Universal Gateway

Weaknesses