Arbitrary Operations via SCIM Endpoints in Multiple WSO2 Products Enables User Account Takeover

Summary

The SCIM endpoint does not sufficiently validate authorization for federated users when performing operations against the local user store. This occurs when a local and a federated user share the same username, allowing a federated user to perform actions intended for a local user, including arbitrary operations. A malicious actor authenticated as a federated user may perform arbitrary operations on local user accounts via the SCIM 2.0 or SCIM 1.1 endpoints when local and federated users share the same username. This could lead to user account takeover. Deployments that do not support user self-registration are considered medium severity.

Timeline

1. Oct 19, 2026, 4:40 PM UTCCVE published
2. Oct 20, 2026, 7:29 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: yes · Technical impact: partial

3. Oct 20, 2026, 7:29 PM UTCRecord last updated

Affected versions

• WSO2 WSO2 Identity Server as Key Manager

  From 5.10.0 · fixed in 5.10.0.370

• WSO2 WSO2 Open Banking IAM

  From 2.0.0 · fixed in 2.0.0.419

• WSO2 WSO2 Identity Server

  From 5.10.0 · fixed in 5.10.0.379; From 5.11.0 · fixed in 5.11.0.415; From 6.0.0 · fixed in 6.0.0.251; From 6.1.0 · fixed in 6.1.0.251; From 7.0.0 · fixed in 7.0.0.127; From 7.1.0 · fixed in 7.1.0.34

• org.wso2.carbon.identity.inbound.provisioning.scim:org.wso2.carbon.identity.scim.common

  From 5.6.0 · fixed in 5.6.0.1; From 5.6.1 · fixed in 5.6.1.2; From 5.7.0 · fixed in 5.7.0.3; From 5.7.1 · fixed in 5.7.1.1; From 5.7.7 · fixed in 5.7.7.1; From 5.7.8 · fixed in 5.7.8.1

• org.wso2.carbon.identity.inbound.provisioning.scim2:org.wso2.carbon.identity.scim2.common

  From 1.5.1 · fixed in 1.5.1.40; From 1.5.46 · fixed in 1.5.46.47

References 1