CVE-2026-41329Network attack vector

Owner-only tool access via inherited heartbeat context

Published Apr 20, 2026 · Updated Apr 20, 2026

Sandbox bypass in OpenClaw 2026.3.28 and earlier allows remote attackers to gain owner-only tool access through exec-event heartbeats. The heartbeat runner reused an owner session's delivery target and allowed authorization resolution to set senderIsOwner for a synthetic exec-event context instead of forcing that context to remain non-owner. Exploitation requires an exec-event heartbeat routed to an owner-associated session; the elevated tool surface exposes host-affecting owner-only actions.

CVSS severity9.5
Critical
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox bypass in OpenClaw 2026.3.28 and earlier allows remote attackers to gain owner-only tool access through exec-event heartbeats. The heartbeat runner reused an owner session's delivery target and allowed authorization resolution to set senderIsOwner for a synthetic exec-event context instead of forcing that context to remain non-owner. Exploitation requires an exec-event heartbeat routed to an owner-associated session; the elevated tool surface exposes host-affecting owner-only actions.

The record

CVE
CVE-2026-41329
Published
Apr 20, 2026
Updated
Apr 20, 2026
Vendor
OpenClaw Foundation
Product
OpenClaw
Classifications
T1068
Attack vector
network
Privileges
unauthenticated

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 privilegesunauthenticated

What is affected?

OpenClaw Foundation · OpenClawversion=0 <2026.3.31

Published CVSS scores

9.5OpenClawCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

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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