CVE-2026-3583

Improper Token Revocation via OAuth2 Scope Enforcement in Multiple WSO2 Products [Disrupted Authentication Flows]

Published Oct 28, 2026 CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed

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.

Affected Products

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.

Vendor Product Versions

Wso2

Api Control Plane

Version	Status	Scheme	Platform
`[3.1.0,3.1.0.367)`	affected	generic	—
`[3.2.0,3.2.0.475)`	affected	generic	—
`[3.2.1,3.2.1.106)`	affected	generic	—
`[4.0.0,4.0.0.394)`	affected	generic	—
`[4.1.0,4.1.0.267)`	affected	generic	—
`[4.2.0,4.2.0.207)`	affected	generic	—
`[4.3.0,4.3.0.120)`	affected	generic	—
`[4.4.0,4.4.0.83)`	affected	generic	—
`[4.5.0,4.5.0.67)`	affected	generic	—
`[4.6.0,4.6.0.29)`	affected	generic	—
`[4.7.0,4.7.0.3)`	affected	generic	—

Wso2

Api Manager

Version	Status	Scheme	Platform
`[4.5.0,4.5.0.65)`	affected	generic	—
`[4.6.0,4.6.0.29)`	affected	generic	—
`[4.7.0,4.7.0.3)`	affected	generic	—

Wso2

Identity Server

Version	Status	Scheme	Platform
`[4.5.0,4.5.0.68)`	affected	generic	—
`[4.6.0,4.6.0.30)`	affected	generic	—
`[4.7.0,4.7.0.3)`	affected	generic	—

Wso2

Identity Server

Version	Status	Scheme	Platform
`[5.10.0,5.10.0.397)`	affected	generic	—
`[5.11.0,5.11.0.444)`	affected	generic	—
`[6.0.0,6.0.0.270)`	affected	generic	—
`[6.1.0,6.1.0.269)`	affected	generic	—
`[7.0.0,7.0.0.152)`	affected	generic	—
`[7.1.0,7.1.0.61)`	affected	generic	—
`[7.2.0,7.2.0.20)`	affected	generic	—
`[7.3.0,7.3.0.1)`	affected	generic	—

Wso2

Wso2 Api Control Plane

Version	Status	Scheme	Platform
`[3.1.0,3.1.0.367)`	affected	generic	—
`[3.2.0,3.2.0.475)`	affected	generic	—
`[3.2.1,3.2.1.106)`	affected	generic	—
`[4.0.0,4.0.0.394)`	affected	generic	—
`[4.1.0,4.1.0.267)`	affected	generic	—
`[4.2.0,4.2.0.207)`	affected	generic	—
`[4.3.0,4.3.0.120)`	affected	generic	—
`[4.4.0,4.4.0.83)`	affected	generic	—
`[4.5.0,4.5.0.67)`	affected	generic	—
`[4.6.0,4.6.0.29)`	affected	generic	—
`[4.7.0,4.7.0.3)`	affected	generic	—

Wso2

Wso2 Api Manager

Version	Status	Scheme	Platform
`[4.5.0,4.5.0.65)`	affected	generic	—
`[4.6.0,4.6.0.29)`	affected	generic	—
`[4.7.0,4.7.0.3)`	affected	generic	—

Wso2

Wso2 Carbon Oauth

Version	Status	Scheme	Platform
`[4.5.0,4.5.0.67)`	affected	generic	—
`[4.6.0,4.6.0.29)`	affected	generic	—
`[4.7.0,4.7.0.3)`	affected	generic	—

Wso2

Wso2 Identity Server

Version	Status	Scheme	Platform
`[4.5.0,4.5.0.68)`	affected	generic	—
`[4.6.0,4.6.0.30)`	affected	generic	—
`[4.7.0,4.7.0.3)`	affected	generic	—

Wso2

Wso2 Identity Server

Version	Status	Scheme	Platform
`[5.10.0,5.10.0.397)`	affected	generic	—
`[5.11.0,5.11.0.444)`	affected	generic	—
`[6.0.0,6.0.0.270)`	affected	generic	—
`[6.1.0,6.1.0.269)`	affected	generic	—
`[7.0.0,7.0.0.152)`	affected	generic	—
`[7.1.0,7.1.0.61)`	affected	generic	—
`[7.2.0,7.2.0.20)`	affected	generic	—
`[7.3.0,7.3.0.1)`	affected	generic	—

Wso2

Wso2 Open Banking Am

Version	Status	Scheme	Platform
`[2.0.0,2.0.0.434)`	affected	generic	—

Wso2

Wso2 Open Banking Iam

Version	Status	Scheme	Platform
`[5.10.0,5.10.0.387)`	affected	generic	—

Wso2

Wso2 Traffic Manager

Version	Status	Scheme	Platform
`[2.0.0,2.0.0.414)`	affected	generic	—

Wso2

Wso2 Universal Gateway

Version	Status	Scheme	Platform
`[6.4.2,6.4.2.178)`	affected	generic	—
`[6.4.111,6.4.111.174)`	affected	generic	—
`[6.4.176,6.4.176.38)`	affected	generic	—
`[6.4.180,6.4.180.25)`	affected	generic	—
`[6.8.0,6.8.0.59)`	affected	generic	—
`[6.9.6,6.9.6.36)`	affected	generic	—
`[6.11.21,6.11.21.118)`	affected	generic	—
`[6.13.16,6.13.16.32)`	affected	generic	—
`[6.13.19,6.13.19.23)`	affected	generic	—
`[6.13.27,6.13.27.21)`	affected	generic	—
`[6.13.41,6.13.41.9)`	affected	generic	—
`[6.14.14,6.14.14.3)`	affected	generic	—
`[7.0.26,7.0.26.103)`	affected	generic	—
`[7.0.259,7.0.259.54)`	affected	generic	—
`[7.0.385,7.0.385.15)`	affected	generic	—
`[7.4.99,7.4.99.5)`	affected	generic	—
`[7.5.78,*]`	unaffected	generic	—

Remediation

Vendor Solution

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

Tracking

Advisories

No advisories available

Metrics

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.

Exploit prediction score: < 1% (0.264% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

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

History

Oct 29, 2026 2:30 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Oct 28, 2026 9:30 PM First appearance in the feed. Affected vendors updated View changes

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

Oct 28, 2026 7:30 PM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

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		https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5175/
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'}`

Subscriptions

Wso2 Api Control Plane Api Manager Identity Server Wso2 Api Control Plane Wso2 Api Manager Wso2 Carbon Oauth Wso2 Identity Server Wso2 Identity Server As Key Manager Wso2 Open Banking Am Wso2 Open Banking Iam Wso2 Traffic Manager Wso2 Universal Gateway

Weaknesses