Critical severity · published Aug 6, 2026
CVE-2026-5430
Authentication Bypass via JWT Algorithm Mismatch in Multiple WSO2 Products Allows Account Takeover
In wildKEV
10.0
CVSS
22.4%
EPSS
Yes
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)22.4% · higher than 98% of CVEs
Exploited in the wildYes
CISA KEVListed Sep 24, 2026
Federal remediation dueSep 27, 2026
Ransomware campaign useNot known
Affected products
Which versions
WA
WSO2 API Control Plane · WSO2
4.5.0 before 4.5.0.58; 4.6.0 before 4.6.0.22 · source: vendor
WA
WSO2 API Manager · WSO2
4.1.0 before 4.1.0.257; 4.2.0 before 4.2.0.197; 4.3.0 before 4.3.0.108; 4.4.0 before 4.4.0.72; 4.5.0 before 4.5.0.57; 4.6.0 before 4.6.0.21 · source: vendor
WC
WSO2 Carbon API Manager Rest API Utility · WSO2
9.20.74 before 9.20.74.401; 9.28.116 before 9.28.116.417; 9.29.120 before 9.29.120.236; 9.30.67 before 9.30.67.167; 9.31.86 before 9.31.86.158; 9.32.147 before 9.32.147.59 · source: vendor
WT
WSO2 Traffic Manager · WSO2
4.5.0 before 4.5.0.56; 4.6.0 before 4.6.0.21 · source: vendor
WU
WSO2 Universal Gateway · WSO2
4.5.0 before 4.5.0.57; 4.6.0 before 4.6.0.21 · source: vendor
AC
Api Control Plane · Wso2
4.5.0 before 4.5.0.58; 4.6.0 before 4.6.0.22 · source: NVD
AM
Api Manager · Wso2
4.1.0 before 4.1.0.257; 4.2.0 before 4.2.0.197; 4.3.0 before 4.3.0.108; 4.4.0 before 4.4.0.72; 4.5.0 before 4.5.0.57; 4.6.0 before 4.6.0.21 · source: NVD
TM
Traffic Manager · Wso2
4.5.0 before 4.5.0.56; 4.6.0 before 4.6.0.21 · source: NVD
UG
Universal Gateway · Wso2
4.5.0 before 4.5.0.57; 4.6.0 before 4.6.0.21 · source: NVD
MP
Multiple Products · WSO2
All versions, or not specified · source: KEV
In the news
VulnerabilityCritical
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 (KEV) catalog, based on evidence of active exploitation.
The vulnerabilities are listed below -
CVE-2026-5430 (CVS score: 9.8) - A path traversal vulnerability in WSO2 API Control Plane,
Sep 25, 2026·The Hacker News
AdvisoryHigh
CISA Adds Two Known Exploited Vulnerabilities to Catalog
CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation.
CVE-2026-5430 WSO2 Multiple Products Path Traversal Vulnerability
CVE-2026-71362 Adobe Commerce and Magento Incorrect Authorization Vulnerability
These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risks to the federal enterprise.
Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Executive Branch (FCEB) agencies. BOD 26-04 reinforces the importance of the KEV Catalog and requires federal agencies to prioritize rapid remediation of high-risk vulnerabilities, specifically those identified by Common Vulnerabilities and Exposures (CVEs) listed in CISA’s KEV Catalog on publicly exposed assets that grant total control of the asset post-exploitation, while deferring action for lower-risk vulnerabilities. BOD 26-04 further establishes basic expectations for when agencies must check whether threat actors compromised the system before the patch was applied.
While BOD 26-04 applies only to FCEB agencies, CISA encourages all organizations to adopt risk-based vulnerability management and prioritize remediation of KEV Catalog vulnerabilities . CISA will continue to add vulnerabilities to the catalog that meet the specified criteria .
Aware of an e...
Sep 24, 2026·CISA Advisories
VulnerabilityHigh
[CISA KEV] CVE-2026-5430: WSO2 Multiple Products - WSO2 Multiple Products Path Traversal Vulnerability
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.
MPMultiple ProductsCVE-2026-5430
Sep 24, 2026·CISA KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5430
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5430
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
vendor-advisory
https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/
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