CVE-2026-42438Network attack vector

Host file disclosure via sender policy bypass

Published May 5, 2026 · Updated May 5, 2026

Incorrect authorization in OpenClaw 2026.4.9 allows remote authenticated users to read host-local files through outbound media. The outbound host-media attachment read helper installs host readFile capability from global or agent policy without applying sender context. Affected deployments allow host reads globally or per agent while denying read through sender or group policy; a denied sender can retrieve files readable by the OpenClaw process.

CVSS severity4.9
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in OpenClaw 2026.4.9 allows remote authenticated users to read host-local files through outbound media. The outbound host-media attachment read helper installs host readFile capability from global or agent policy without applying sender context. Affected deployments allow host reads globally or per agent while denying read through sender or group policy; a denied sender can retrieve files readable by the OpenClaw process.

The record

CVE
CVE-2026-42438
Published
May 5, 2026
Updated
May 5, 2026
Vendor
OpenClaw Foundation
Product
OpenClaw
Classifications
CWE-863, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 5, 2026CVE publishedPublication date reported by the CVE source.
  2. May 5, 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=2026.4.9 <2026.4.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenClaw Foundation · OpenClawversion=2026.4.9 <2026.4.10

Published CVSS scores

4.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N
7.7VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A: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-863Incorrect Authorization
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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