Incomplete OAuth Token Revocation via Case Mismatch in WSO2 Identity Server Allows Continued Access After Lifecycle Events
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 Identity Server | unaffected |
|
|||||||||
| WSO2 | WSO2 Carbon OAuth | unknown |
|
No data.
No data.
| Vendor | Product | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wso2 | Identity Server |
|
||||||||||||
| Wso2 | Wso2 Carbon Oauth |
|
||||||||||||
| Wso2 | Wso2 Identity Server |
|
Vendor Solution
Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5387/#solution
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.212% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Wso2 identity Server
|
|
| Vendors & Products |
Wso2 identity Server
|
| Type | Values Removed | Values Added |
|---|---|---|
| Description | In deployments of WSO2 Identity Server configured with a case-insensitive user store and a case-sensitive database for identity data, mismatches in username case handling can occur. This inconsistency results in OAuth token revocation operations failing to correctly identify usernames containing mixed-case characters during certain lifecycle events, preventing tokens from being invalidated. A malicious actor can exploit this vulnerability by possessing a valid access or refresh token associated with a mixed-case username. In affected configurations, these tokens may not be revoked when expected. The actor can then leverage these unrevoked tokens, before their expiry, to continue performing actions that should have been restricted, effectively bypassing intended access controls. | |
| Title | Incomplete OAuth Token Revocation via Case Mismatch in WSO2 Identity Server Allows Continued Access After Lifecycle Events | |
| First Time appeared |
Wso2
Wso2 wso2 Carbon Oauth Wso2 wso2 Identity Server |
|
| Weaknesses | CWE-613 | |
| CPEs | cpe:2.3:a:wso2:wso2_carbon_oauth:*:*:*:*:*:*:*:* cpe:2.3:a:wso2:wso2_identity_server:*:*:*:*:*:*:*:* |
|
| Vendors & Products |
Wso2
Wso2 wso2 Carbon Oauth Wso2 wso2 Identity Server |
|
| References |
| |
| Metrics |
cvssV3_1
|