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Known Exploited Vulnerability
10.0
CRITICAL CVSS 3.1
CVE-2026-5430
WSO2 Multiple Products Path Traversal Vulnerability - [Actively Exploited]
Overview
Description

The JWT authentication mechanism accepts tokens signed with algorithms other than those explicitly configured or supported. This allows an attacker to craft a JWT with an unsupported algorithm, which is then incorrectly validated, leading to unauthorized access. Successful exploitation of this vulnerability may result in unauthorized access to the system, including the potential compromise of administrative accounts and full account takeover. The CVSS score is adjusted to 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) in single-tenant deployments, reflecting that the impact is contained within a single security authority boundary.

Details
INFO

Published Date :

Aug. 6, 2026, 8:16 a.m.

Last Modified :

Sept. 25, 2026, 12:53 p.m.

Remotely Exploit :

Yes !

Source :

ed10eef1-636d-4fbe-9993-6890dfa878f8
CISA Notification
CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

Description :

WSO2 API Control Plane, API Manager, Traffic Manager & Universal Gateway contain a path traversal vulnerability that could allow for unrestricted file upload and lead to remote code execution.

Required Action :

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Known Ransomware Campaign Use:

Unknown

Notes :

https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/ ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-5430

Impact
Affected Products

The following products are affected by CVE-2026-5430 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Wso2 api_manager
2 Wso2 api_control_plane
3 Wso2 traffic_manager
4 Wso2 universal_gateway
: Total Affected Vendor : 1 | Products : 4
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 134c704f-9b21-4f2e-91b3-4a467353bcc0
CVSS 3.1 CRITICAL ed10eef1-636d-4fbe-9993-6890dfa878f8
CVSS 3.1 CRITICAL MITRE-CVE
Solution
Update JWT validation to enforce allowed signing algorithms and reject unsupported ones.
  • Configure JWT validation to strictly enforce allowed algorithms.
  • Update JWT libraries to the latest secure versions.
  • Remove support for insecure or unsupported JWT algorithms.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-5430.

URL Resource
https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/ Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-5430 US Government Resource
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-5430 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-5430 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-5430 vulnerability anywhere in the article.

  • TheCyberThrone
Four More Vulnerabilities Enter CISA KEV

CISA has added four vulnerabilities affecting WSO2, Adobe Commerce, Microsoft SharePoint and MikroTik RouterOS to its Known Exploited Vulnerabilities (KEV) Catalog.Hacking & CrackingThe common factor ... Read more

Published Date: Sep 28, 2026 (1 week, 2 days ago)
  • The Hacker News
WSO2 and Adobe Commerce Flaws Exploited in Attacks, Added to CISA KEV

The U.S. Cybersecurity and Infrastructure Security Agency (CISA), on Thursday, added two critical security flaws impacting WSO2 and Adobe Commerce and Magento to its Known Exploited Vulnerabilities (K ... Read more

Published Date: Sep 25, 2026 (1 week, 6 days ago)
  • The Hacker News
Active Exploitation Attempts Target WSO2 API Manager JWT Bypass With Forged Admin Tokens

A critical security flaw in WSO2 API Manager has come under active exploitation in the wild, according to findings from watchTowr. The vulnerability, tracked as CVE-2026-5430 (CVSS score: 9.8/10.0), i ... Read more

Published Date: Sep 16, 2026 (3 weeks, 1 day ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-5430 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Modified Analysis by [email protected]

    Sep. 25, 2026

    Action Type Old Value New Value
    Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-5430 Types: US Government Resource
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Sep. 25, 2026

    Action Type Old Value New Value
    Removed SSVC {'id': 'CVE-2026-5430', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-09-24T19:40:03.351836Z'}
    Added SSVC {'id': 'CVE-2026-5430', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-09-24T00:00:00+00:00'}
  • CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725

    Sep. 24, 2026

    Action Type Old Value New Value
    Added Date Added 2026-09-24
    Added Due Date 2026-09-24
    Added Required Action 2026-09-24
    Added Vulnerability Name 2026-09-24
  • CVE Modified by ed10eef1-636d-4fbe-9993-6890dfa878f8

    Sep. 24, 2026

    Action Type Old Value New Value
    Added Reference https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/
    Removed Reference https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/
    Removed Reference Type https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/ Types: Vendor Advisory
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Sep. 24, 2026

    Action Type Old Value New Value
    Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-5430
    Removed SSVC {'id': 'CVE-2026-5430', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-06T12:30:48.140300Z'}
    Added SSVC {'id': 'CVE-2026-5430', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-09-24T19:40:03.351836Z'}
  • Initial Analysis by [email protected]

    Aug. 10, 2026

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:wso2:api_control_plane:*:*:*:*:*:*:*:* versions from (including) 4.5.0 up to (excluding) 4.5.0.58 *cpe:2.3:a:wso2:api_control_plane:*:*:*:*:*:*:*:* versions from (including) 4.6.0 up to (excluding) 4.6.0.22
    Added CPE Configuration OR *cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:* versions from (including) 4.1.0 up to (excluding) 4.1.0.257 *cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:* versions from (including) 4.2.0 up to (excluding) 4.2.0.197 *cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:* versions from (including) 4.3.0 up to (excluding) 4.3.0.108 *cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:* versions from (including) 4.4.0 up to (excluding) 4.4.0.72 *cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:* versions from (including) 4.5.0 up to (excluding) 4.5.0.57 *cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:* versions from (including) 4.6.0 up to (excluding) 4.6.0.21
    Added CPE Configuration OR *cpe:2.3:a:wso2:traffic_manager:*:*:*:*:*:*:*:* versions from (including) 4.5.0 up to (excluding) 4.5.0.56 *cpe:2.3:a:wso2:traffic_manager:*:*:*:*:*:*:*:* versions from (including) 4.6.0 up to (excluding) 4.6.0.21
    Added CPE Configuration OR *cpe:2.3:a:wso2:universal_gateway:*:*:*:*:*:*:*:* versions from (including) 4.5.0 up to (excluding) 4.5.0.57 *cpe:2.3:a:wso2:universal_gateway:*:*:*:*:*:*:*:* versions from (including) 4.6.0 up to (excluding) 4.6.0.21
    Added Reference Type WSO2 LLC: https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/ Types: Vendor Advisory
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Aug. 06, 2026

    Action Type Old Value New Value
    Added SSVC {'id': 'CVE-2026-5430', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-06T12:30:48.140300Z'}
  • New CVE Received by ed10eef1-636d-4fbe-9993-6890dfa878f8

    Aug. 06, 2026

    Action Type Old Value New Value
    Added Affected [{'vendor': 'WSO2', 'product': 'WSO2 Universal Gateway', 'versions': [{'status': 'affected', 'version': '4.5.0', 'lessThan': '4.5.0.57', 'versionType': 'custom'}, {'status': 'affected', 'version': '4.6.0', 'lessThan': '4.6.0.21', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'WSO2', 'product': 'WSO2 Traffic Manager', 'versions': [{'status': 'affected', 'version': '4.5.0', 'lessThan': '4.5.0.56', 'versionType': 'custom'}, {'status': 'affected', 'version': '4.6.0', 'lessThan': '4.6.0.21', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'WSO2', 'product': 'WSO2 API Control Plane', 'versions': [{'status': 'affected', 'version': '4.5.0', 'lessThan': '4.5.0.58', 'versionType': 'custom'}, {'status': 'affected', 'version': '4.6.0', 'lessThan': '4.6.0.22', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'WSO2', 'product': 'WSO2 API Manager', 'versions': [{'status': 'unknown', 'version': '0', 'lessThan': '4.1.0', 'versionType': 'custom'}, {'status': 'affected', 'version': '4.1.0', 'lessThan': '4.1.0.257', 'versionType': 'custom'}, {'status': 'affected', 'version': '4.2.0', 'lessThan': '4.2.0.197', 'versionType': 'custom'}, {'status': 'affected', 'version': '4.3.0', 'lessThan': '4.3.0.108', 'versionType': 'custom'}, {'status': 'affected', 'version': '4.4.0', 'lessThan': '4.4.0.72', 'versionType': 'custom'}, {'status': 'affected', 'version': '4.5.0', 'lessThan': '4.5.0.57', 'versionType': 'custom'}, {'status': 'affected', 'version': '4.6.0', 'lessThan': '4.6.0.21', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'WSO2', 'product': 'WSO2 Carbon API Manager Rest API Utility', 'versions': [{'status': 'affected', 'version': '9.20.74', 'lessThan': '9.20.74.401', 'versionType': 'custom'}, {'status': 'affected', 'version': '9.28.116', 'lessThan': '9.28.116.417', 'versionType': 'custom'}, {'status': 'affected', 'version': '9.29.120', 'lessThan': '9.29.120.236', 'versionType': 'custom'}, {'status': 'affected', 'version': '9.30.67', 'lessThan': '9.30.67.167', 'versionType': 'custom'}, {'status': 'affected', 'version': '9.31.86', 'lessThan': '9.31.86.158', 'versionType': 'custom'}, {'status': 'affected', 'version': '9.32.147', 'lessThan': '9.32.147.59', 'versionType': 'custom'}, {'status': 'unaffected', 'version': '9.33.106', 'versionType': 'custom', 'lessThanOrEqual': '*'}], 'packageName': 'org.wso2.carbon.apimgt:org.wso2.carbon.apimgt.rest.api.util', 'defaultStatus': 'unknown'}]
    Added Description The JWT authentication mechanism accepts tokens signed with algorithms other than those explicitly configured or supported. This allows an attacker to craft a JWT with an unsupported algorithm, which is then incorrectly validated, leading to unauthorized access. Successful exploitation of this vulnerability may result in unauthorized access to the system, including the potential compromise of administrative accounts and full account takeover. The CVSS score is adjusted to 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) in single-tenant deployments, reflecting that the impact is contained within a single security authority boundary.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    Added CWE CWE-347
    Added Reference https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 10
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact