CVE-2026-41296Network attack vector

Sandbox escape via raced remote filesystem read

Published Apr 20, 2026 · Updated Apr 20, 2026

TOCTOU race in OpenClaw before 2026.3.31 allows remote authenticated users to escape the sandbox and read arbitrary files. The remote filesystem bridge readFile path validates a pathname and then reads it separately, allowing a raced path replacement between those operations. Exploitation requires low-privileged access to the remote sandbox bridge and winning the filesystem race; the demonstrated consequence is unauthorized host-file disclosure.

CVSS severity8.8
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

TOCTOU race in OpenClaw before 2026.3.31 allows remote authenticated users to escape the sandbox and read arbitrary files. The remote filesystem bridge readFile path validates a pathname and then reads it separately, allowing a raced path replacement between those operations. Exploitation requires low-privileged access to the remote sandbox bridge and winning the filesystem race; the demonstrated consequence is unauthorized host-file disclosure.

The record

CVE
CVE-2026-41296
Published
Apr 20, 2026
Updated
Apr 20, 2026
Vendor
OpenClaw Foundation
Product
OpenClaw
Classifications
CWE-367, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 20, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2026.3.31

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenClaw Foundation · OpenClawversion=0 <2026.3.31

Published CVSS scores

9.4GitHub Security AdvisoryCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:H
8.2VulnCheckCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
8.8VulnCheckCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/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-367Time-of-check Time-of-use (TOCTOU) Race Condition
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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