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CVE-2026-5430
10.0 CRITICAL
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): None (N)
- User Interaction (UI): None (N)
- Scope (S): Changed (C)
- Confidentiality (C): High (H)
- Integrity (I): High (H)
- Availability (A): High (H)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): Low (L)
- Modified Privileges Required (MPR): None (N)
- Modified User Interaction (MUI): None (N)
- Modified Confidentiality (MC): High (H)
- Modified Scope (MS): Changed (C)
- Modified Integrity (MI): High (H)
- Modified Availability (MA): High (H)
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Authentication Bypass via JWT Algorithm Mismatch in Multiple WSO2 Products Allows Account Takeover
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.
References
Affected products
WSO2 API Manager
- <4.1.0.257
- <4.1.0
- <4.4.0.72
- <4.6.0.21
- <4.3.0.108
- <4.2.0.197
- <4.5.0.57
WSO2 Traffic Manager
- <4.6.0.21
- <4.5.0.56
WSO2 API Control Plane
- <4.6.0.22
- <4.5.0.58
WSO2 Universal Gateway
- <4.5.0.57
- <4.6.0.21
org.wso2.carbon.apimgt:org.wso2.carbon.apimgt.rest.api.util
- <9.29.120.236
- =<*
- <9.28.116.417
- <9.20.74.401
- <9.31.86.158
- <9.30.67.167
- <9.32.147.59