When the `allowed_scopes` configuration is enabled, the OAuth2 token introspection mechanism does not immediately invalidate a token in the cache after a revocation request. This results in a scenario where an access token that was introspected immediately before a revocation request may be returned again to the client after revocation, until the relevant cache entry is cleared.

The security consequence is that a revoked access token may be re-issued to the client during the cache lifetime. While the re-issued token is not treated as valid for API authorization, affected users may be unable to obtain a new valid access token until the cache is cleared, which can disrupt authentication flows.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

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 < 3.1.0
3.1.0 affected < 3.1.0.367
3.2.0 affected < 3.2.0.475
3.2.1 affected < 3.2.1.106
4.0.0 affected < 4.0.0.394
4.1.0 affected < 4.1.0.267
4.2.0 affected < 4.2.0.207
4.3.0 affected < 4.3.0.120
4.4.0 affected < 4.4.0.83
4.5.0 affected < 4.5.0.67
4.6.0 affected < 4.6.0.29
4.7.0 affected < 4.7.0.3
WSO2 WSO2 Traffic Manager unaffected
Version Status Constraints
0 unknown < 4.5.0
4.5.0 affected < 4.5.0.65
4.6.0 affected < 4.6.0.29
4.7.0 affected < 4.7.0.3
WSO2 WSO2 Universal Gateway unaffected
Version Status Constraints
0 unknown < 4.5.0
4.5.0 affected < 4.5.0.67
4.6.0 affected < 4.6.0.29
4.7.0 affected < 4.7.0.3
WSO2 WSO2 API Control Plane unaffected
Version Status Constraints
0 unknown < 4.5.0
4.5.0 affected < 4.5.0.68
4.6.0 affected < 4.6.0.30
4.7.0 affected < 4.7.0.3
WSO2 WSO2 Identity Server unaffected
Version Status Constraints
0 unknown < 5.10.0
5.10.0 affected < 5.10.0.397
5.11.0 affected < 5.11.0.444
6.0.0 affected < 6.0.0.270
6.1.0 affected < 6.1.0.269
7.0.0 affected < 7.0.0.152
7.1.0 affected < 7.1.0.61
7.2.0 affected < 7.2.0.20
7.3.0 affected < 7.3.0.1
WSO2 WSO2 Open Banking IAM unaffected
Version Status Constraints
0 unknown < 2.0.0
2.0.0 affected < 2.0.0.434
WSO2 WSO2 Identity Server as Key Manager unaffected
Version Status Constraints
0 unknown < 5.10.0
5.10.0 affected < 5.10.0.387
WSO2 WSO2 Open Banking AM unaffected
Version Status Constraints
0 unknown < 2.0.0
2.0.0 affected < 2.0.0.414
WSO2 WSO2 Carbon OAuth unknown
Version Status Constraints
6.4.2 affected < 6.4.2.178
6.4.111 affected < 6.4.111.174
6.4.176 affected < 6.4.176.38
6.4.180 affected < 6.4.180.25
6.8.0 affected < 6.8.0.59
6.9.6 affected < 6.9.6.36
6.11.21 affected < 6.11.21.118
6.13.16 affected < 6.13.16.32
6.13.19 affected < 6.13.19.23
6.13.27 affected < 6.13.27.21
6.13.41 affected < 6.13.41.9
6.14.14 affected < 6.14.14.3
7.0.26 affected < 7.0.26.103
7.0.259 affected < 7.0.259.54
7.0.385 affected < 7.0.385.15
7.4.99 affected < 7.4.99.5
7.5.78 unaffected ≤ *

No data.

No data.

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Advisories

No advisories yet.

Fixes

Solution

Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5175/#solution

Workaround

No workaround given by the vendor.

References
Link Providers
https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5175/ cve-icon cve-icon
History

Wed, 28 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Wso2 api Control Plane
Wso2 api Manager
Wso2 identity Server
Vendors & Products Wso2 api Control Plane
Wso2 api Manager
Wso2 identity Server

Wed, 28 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Description When the `allowed_scopes` configuration is enabled, the OAuth2 token introspection mechanism does not immediately invalidate a token in the cache after a revocation request. This results in a scenario where an access token that was introspected immediately before a revocation request may be returned again to the client after revocation, until the relevant cache entry is cleared. The security consequence is that a revoked access token may be re-issued to the client during the cache lifetime. While the re-issued token is not treated as valid for API authorization, affected users may be unable to obtain a new valid access token until the cache is cleared, which can disrupt authentication flows.
Title Improper Token Revocation via OAuth2 Scope Enforcement in Multiple WSO2 Products [Disrupted Authentication Flows]
First Time appeared Wso2
Wso2 wso2 Api Control Plane
Wso2 wso2 Api Manager
Wso2 wso2 Carbon Oauth
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
Weaknesses CWE-613
CPEs cpe:2.3:a:wso2:wso2_api_control_plane:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_carbon_oauth:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_identity_server:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_identity_server_as_key_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_open_banking_am:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_open_banking_iam:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_traffic_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_universal_gateway:*:*:*:*:*:*:*:*
Vendors & Products Wso2
Wso2 wso2 Api Control Plane
Wso2 wso2 Api Manager
Wso2 wso2 Carbon Oauth
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
References
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: WSO2

Published:

Updated: 2026-10-28T19:21:34.577Z

Reserved: 2026-03-05T02:24:55.645Z

Link: CVE-2026-3583

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-28T20:17:24.340

Modified: 2026-10-28T20:17:24.340

Link: CVE-2026-3583

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-28T21:15:15Z

Weaknesses