CVE-2026-41333Network attack vector

Password brute force via fake device tokens

Published Apr 23, 2026 · Updated Apr 23, 2026

Authentication rate-limit bypass in OpenClaw before 2026.3.31 allows remote attackers to brute-force weak shared passwords. In resolveConnectAuthState, the mixed WebSocket handshake omitted the shared-secret rate limiter whenever any device-token candidate was present. The Gateway must be reachable with shared authentication enabled, and the practical consequence is limited to secrets weak enough to guess.

CVSS severity6.3
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication rate-limit bypass in OpenClaw before 2026.3.31 allows remote attackers to brute-force weak shared passwords. In resolveConnectAuthState, the mixed WebSocket handshake omitted the shared-secret rate limiter whenever any device-token candidate was present. The Gateway must be reachable with shared authentication enabled, and the practical consequence is limited to secrets weak enough to guess.

The record

CVE
CVE-2026-41333
Published
Apr 23, 2026
Updated
Apr 23, 2026
Vendor
OpenClaw Foundation
Product
OpenClaw
Classifications
CWE-799, T1110.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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

6.3VulnCheckCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
3.7VulnCheckCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-799Improper Control of Interaction Frequency
T1110.001Password Guessing

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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