CVE-2026-88860 Cap-go CVE debrief

Who should care

Defenders and administrators of Capgo environments should be aware of this vulnerability and take steps to verify and remediate it, especially in environments where role bindings and channel permissions are frequently updated or managed.

Why it matters

This vulnerability in Capgo allows attackers to retain channel-specific permissions after their base RBAC access has been revoked, potentially leading to unauthorized actions. Defenders and administrators of Capgo environments should verify and remediate this vulnerability to prevent unauthorized actions.

• Defenders need to verify and remediate this vulnerability to prevent unauthorized actions in Capgo environments.
• Administrators should review and update role bindings and channel permissions to ensure proper cleanup when access is revoked.
• This vulnerability may require additional monitoring for suspicious activity related to channel-specific permissions in Capgo.

Technical summary

Capgo fails to clean up channel permission overrides when a user's last organization role binding is deleted, leaving stale overrides active. This allows attackers to retain channel-specific permissions after their base RBAC access has been revoked, potentially leading to unauthorized actions like changing production OTA versions. The vulnerability affects Capgo environments where role bindings and channel permissions are frequently updated or managed. Defenders and administrators should review and update role bindings and channel permissions to ensure proper cleanup when access is revoked.

Defensive priority

Defenders should prioritize verifying and remediating this vulnerability, especially in environments where Capgo is used, to prevent unauthorized actions.

Recommended defensive actions

• Verify and remediate this vulnerability in Capgo environments to prevent unauthorized actions.
• Review and update role bindings and channel permissions to ensure proper cleanup when access is revoked.
• Monitor for any suspicious activity related to channel-specific permissions in Capgo.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record and NVD entry provide details about the vulnerability in Capgo, which fails to clean up channel permission overrides when a user's last organization role binding is deleted. This leaves stale overrides active, potentially allowing attackers to retain channel-specific permissions after their base RBAC access has been revoked.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.