CVE-2026-35636
Received Received - Intake
Session Isolation Bypass in OpenClaw Enables Unauthorized Session Access

Publication date: 2026-04-09

Last updated on: 2026-04-16

Assigner: VulnCheck

Description
OpenClaw versions 2026.3.11 through 2026.3.24 contain a session isolation bypass vulnerability where session_status resolves sessionId to canonical session keys before enforcing visibility checks. Sandboxed child sessions can exploit this to access parent or sibling sessions that should be blocked by explicit sessionKey restrictions.
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Meta Information
Published
2026-04-09
Last Modified
2026-04-16
Generated
2026-06-16
AI Q&A
2026-04-10
EPSS Evaluated
2026-06-14
NVD
CVE-2026-35636
EUVD
EUVD-2026-21128
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
openclaw openclaw From 2026.3.11 (inc) to 2026.3.25 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-696 The product performs multiple related behaviors, but the behaviors are performed in the wrong order in ways that may produce resultant weaknesses.
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Executive Summary

This vulnerability exists in OpenClaw versions 2026.3.11 through 2026.3.24 and is a session isolation bypass. The issue arises because the session_status function resolves sessionId to canonical session keys before enforcing visibility checks. As a result, sandboxed child sessions can exploit this flaw to access parent or sibling sessions that should normally be blocked by explicit sessionKey restrictions.

Impact Analysis

The vulnerability allows sandboxed child sessions to bypass session isolation and access other sessions, such as parent or sibling sessions, which should be restricted. This can lead to unauthorized access to sensitive session data, potentially compromising confidentiality. According to the CVSS v3.1 score of 6.5, the impact is primarily on confidentiality with no impact on integrity or availability.

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