CVE-2026-41298Network attack vector

Authenticated service interruption via unchecked session kill

Published Apr 20, 2026 · Updated Apr 20, 2026

Missing authorization in OpenClaw before 2026.4.2 allows remote authenticated users to terminate running subagent sessions. The POST /sessions/:sessionKey/kill handler accepts read-scoped identity-bearing HTTP requests and invokes the session-kill mutation without first requiring operator.admin. A read-only operator credential and a known session key are sufficient to interrupt delegated work; the flaw does not grant broader host control.

CVSS severity5.3
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in OpenClaw before 2026.4.2 allows remote authenticated users to terminate running subagent sessions. The POST /sessions/:sessionKey/kill handler accepts read-scoped identity-bearing HTTP requests and invokes the session-kill mutation without first requiring operator.admin. A read-only operator credential and a known session key are sufficient to interrupt delegated work; the flaw does not grant broader host control.

The record

CVE
CVE-2026-41298
Published
Apr 20, 2026
Updated
Apr 20, 2026
Vendor
OpenClaw Foundation
Product
OpenClaw
Classifications
CWE-862
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 <2026.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenClaw Foundation · OpenClawversion=0 <2026.4.2

Published CVSS scores

5.4VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
5.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization

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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