CVE-2026-35636Network attack vector

Cross-session data disclosure via post-resolution visibility check

Published Apr 9, 2026 · Updated Apr 9, 2026

Session isolation bypass in OpenClaw 2026.3.11 through 2026.3.24 allows attackers to access restricted sessions via sessionId input. In session-status-tool.ts, session_status rewrites a sessionId to an agent key before testing whether the input was an explicit agent key, causing the later visibility guard to be skipped. Exploitation requires a sandboxed child session and exposes parent or sibling session data outside its permitted session tree.

CVSS severity7.1
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session isolation bypass in OpenClaw 2026.3.11 through 2026.3.24 allows attackers to access restricted sessions via sessionId input. In session-status-tool.ts, session_status rewrites a sessionId to an agent key before testing whether the input was an explicit agent key, causing the later visibility guard to be skipped. Exploitation requires a sandboxed child session and exposes parent or sibling session data outside its permitted session tree.

The record

CVE
CVE-2026-35636
Published
Apr 9, 2026
Updated
Apr 9, 2026
Vendor
OpenClaw Foundation
Product
OpenClaw
Classifications
CWE-696, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=2026.3.11 <*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenClaw Foundation · OpenClawversion=2026.3.11 <*

Published CVSS scores

6.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
7.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-696Incorrect Behavior Order
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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