CVE-2026-33578Network attack vector

Sender restriction bypass via empty-list policy downgrade

Published Mar 31, 2026 · Updated Mar 31, 2026

Incorrect authorization in OpenClaw before 2026.3.28 allows remote authenticated users to bypass sender restrictions in group chats. Google Chat's applyGoogleChatInboundAccessPolicy and Zalouser's processMessage pass an empty sender list to policy resolution, which changes a route-level allowlist to open instead of preserving it. Exploitation requires membership in an allowlisted Google Chat space or Zalouser group and grants interaction with the configured bot, including its exposed commands.

CVSS severity5.3
Medium
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

Incorrect authorization in OpenClaw before 2026.3.28 allows remote authenticated users to bypass sender restrictions in group chats. Google Chat's applyGoogleChatInboundAccessPolicy and Zalouser's processMessage pass an empty sender list to policy resolution, which changes a route-level allowlist to open instead of preserving it. Exploitation requires membership in an allowlisted Google Chat space or Zalouser group and grants interaction with the configured bot, including its exposed commands.

The record

CVE
CVE-2026-33578
Published
Mar 31, 2026
Updated
Mar 31, 2026
Vendor
OpenClaw Foundation
Product
OpenClaw
Classifications
CWE-863
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 <2026.3.28

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenClaw Foundation · OpenClawversion=0 <2026.3.28

Published CVSS scores

4.3VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
5.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/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

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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