CVE-2026-31998Network attack vector

Unauthorized agent dispatch via empty sender allowlist

Published Mar 19, 2026 · Updated Mar 19, 2026

Authorization bypass in OpenClaw 2026.2.22 through 2026.2.23 allows remote attackers to dispatch agents via Synology Chat webhooks. The checkUserAllowed function returns true for an empty allowedUserIds array, so the webhook handler accepts every sender under allowlist policy. Synology sender access and an enabled plugin with dmPolicy set to allowlist are required; accepted messages can invoke downstream agent and tool actions.

CVSS severity8.3
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in OpenClaw 2026.2.22 through 2026.2.23 allows remote attackers to dispatch agents via Synology Chat webhooks. The checkUserAllowed function returns true for an empty allowedUserIds array, so the webhook handler accepts every sender under allowlist policy. Synology sender access and an enabled plugin with dmPolicy set to allowlist are required; accepted messages can invoke downstream agent and tool actions.

The record

CVE
CVE-2026-31998
Published
Mar 19, 2026
Updated
Mar 19, 2026
Vendor
OpenClaw Foundation
Product
OpenClaw
Classifications
CWE-284, CWE-863, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 19, 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=2026.2.22 <2026.2.24

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenClaw Foundation · OpenClawversion=2026.2.22 <2026.2.24

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N
8.6VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
CWE-863Incorrect Authorization
T1190Exploit Public-Facing Application

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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