CVE-2026-34506Network attack vector

Authenticated bot reply triggering via wildcard authorization

Published Mar 31, 2026 · Updated Mar 31, 2026

Authorization bypass in OpenClaw before 2026.3.8 allows remote authenticated users to trigger bot replies in allowlisted Teams routes. The Microsoft Teams message handler replaces an empty effective groupAllowFrom list with a wildcard when a team or channel route matches. Exposure requires groupPolicy set to allowlist, an allowlisted Teams route, and no effective sender entries; default unauthenticated access is unaffected.

CVSS severity2.3
Low
EPSS probability0.27%
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 before 2026.3.8 allows remote authenticated users to trigger bot replies in allowlisted Teams routes. The Microsoft Teams message handler replaces an empty effective groupAllowFrom list with a wildcard when a team or channel route matches. Exposure requires groupPolicy set to allowlist, an allowlisted Teams route, and no effective sender entries; default unauthenticated access is unaffected.

The record

CVE
CVE-2026-34506
Published
Mar 31, 2026
Updated
Mar 31, 2026
Vendor
OpenClaw Foundation
Product
OpenClaw
Classifications
CWE-863, CWE-289, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 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 <2026.3.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenClaw Foundation · OpenClawversion=0 <2026.3.8

Published CVSS scores

4.3VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
2.3VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/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-863Incorrect Authorization
CWE-289Authentication Bypass by Alternate Name
T1190Exploit Public-Facing Application

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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