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OpenClaw CVE-2026-42429

| EUVDEUVD-2026-26131 MEDIUM
Incorrect Authorization (CWE-863)
2026-04-28 VulnCheck
6.0
CVSS 4.0 · NVD
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Obtain operator.read credentials
  2. Exploit
    Send read-scoped HTTP request via gateway auth route
  3. Execution
    Gateway widens scope to operator.write
  4. Impact
    Execute unauthorized runtime write operations

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization logic validation
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires an authenticated session with at least operator.read scope - unauthenticated attackers cannot exploit this flaw. The gateway plugin must be active and configured with auth: gateway HTTP authentication on plugin routes; deployments not using the gateway plugin or not using the gateway auth mode are not affected. The CVSS AT:P (specific attack requirement) reflects that the attacker must route requests through the specific gateway auth endpoint rather than direct API calls. The GHSA advisory explicitly notes this is scoped to the OpenClaw single-user local assistant trust model, meaning the risk is bounded to contexts where operator.read credentials could be held by a party other than the sole trusted operator - for example, delegated or third-party integrations.

Impact

The CVSS 4.0 score of 6.0 with vector AV:N/AC:L/AT:P/PR:L reflects a network-reachable but low-privilege authenticated attack with a specific attack requirement (AT:P), yielding high integrity impact on the vulnerable system and low confidentiality impact. EPSS at 0.05% (16th percentile) and SSVC classifying exploitation as 'none' and automatable as 'no' together indicate very low real-world exploitation probability. The GHSA advisory explicitly scopes the issue to OpenClaw's single-user local assistant trust model, not a multi-tenant service, which meaningfully limits blast radius. SSVC technical impact is rated 'partial', consistent with the CVSS integrity-only impact. Taken together, this is a real but low-urgency authorization flaw - prioritize patching on a normal cycle rather than emergency response. No conflicting signals were identified between sources.

Exploit ScenarioDerived

An attacker who holds a valid operator.read credential - such as a restricted API token or delegated read-only access - sends a crafted HTTP request through the gateway auth route. The gateway plugin incorrectly grants operator.write runtime permissions in response, allowing the attacker to modify runtime operations they should only be able to read. No public exploit code has been identified at time of analysis.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 24, 2026

Privilege escalation in OpenClaw's gateway plugin HTTP authentication mechanism allows an authenticated user with operator.read scope to gain unauthorized operator.write runtime access. The gateway auth route incorrectly widens identity-bearing read-scoped requests into write permissions, bypassing the intended authorization boundary. No active exploitation has been identified (CISA KEV absent), and the vendor has confirmed a patch in version 2026.4.8 of the npm package.

RemediationAI

Upgrade the openclaw npm package to version 2026.4.8 or later, which contains the vendor-confirmed patch (commit d7c3210cd6f5fdfdc1beff4c9541673e814354d5). The fix is documented in the GitHub Security Advisory at https://github.com/openclaw/openclaw/security/advisories/GHSA-4f8g-77mw-3rxc and the VulnCheck advisory at https://www.vulncheck.com/advisories/openclaw-privilege-escalation-via-gateway-plugin-http-authentication. If immediate upgrade is not possible and the gateway plugin is in use, disabling the auth: gateway HTTP authentication mode on plugin routes would eliminate the vulnerable code path, at the cost of losing gateway-mediated authentication for those routes. No other confirmed workarounds are documented by the vendor.

Affected VersionsENISA

OpenClaw 0 <2026.4.8

Affected Packages

npm openclaw fix: 2026.4.8

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in npm

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

OpenClaw (npm package openclaw, CPE: cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:*:*:*) is a user-controlled local AI assistant. The vulnerability resides in the gateway plugin's HTTP authentication path (auth: gateway), which is responsible for mediating identity and permission scopes between upstream trusted-proxy requests and runtime plugin routes. CWE-863 (Incorrect Authorization) identifies the root cause: the authorization logic fails to enforce scope boundaries, allowing an operator.read credential to be silently elevated to operator.write by the gateway auth handler. Because OpenClaw operates under a single-user trust model rather than a multi-tenant service boundary, the practical blast radius is constrained to the local operator context, but the scope widening still undermines the principle of least privilege within that boundary.

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Severity by source

NVD PRIMARY 6.0 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
vuln.today AI 7.1 HIGH

Network-reachable via gateway HTTP; PR:L because operator.read credentials required; S:U per single-user trust model; I:H for unauthorized write access; C:L for incidental read exposure.

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

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
Low
User Interaction
None
Vulnerable system: Confidentiality
Low
Vulnerable system: Integrity
High
Vulnerable system: Availability
None
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

Lifecycle Timeline

4
Severity Changed
Apr 28, 2026 - 19:52 NVD
HIGH MEDIUM
CVSS changed
Apr 28, 2026 - 19:52 NVD
7.1 (HIGH) 6.0 (MEDIUM)
Patch released
Apr 28, 2026 - 19:30 nvd
Patch available
CVE Published
Apr 28, 2026 - 18:10 nvd
MEDIUM 6.0

DescriptionCVE.org

OpenClaw before 2026.4.8 contains a privilege escalation vulnerability in the gateway plugin HTTP authentication mechanism that widens identity-bearing operator.read requests into runtime operator.write permissions. Attackers can exploit this by sending read-scoped requests through the gateway auth route to gain unauthorized write access to runtime operations.

Threat Intelligence Overview

EPSS Score
0.1%
Top 84% exploitable
Prevalence
Low
niche local AI assistant npm package, limited enterprise footprint
Social Media
1
Sightings
Data Quality
8 sources
Confidence: High
EUVD NVD CVE.org EPSS Vulnrichment CIRCL GitHub VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.1%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

30
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +30
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.

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9.4 Mar 05

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8.7 Mar 26

Path traversal in OpenClaw through version 2026.3.23 enables unauthenticated remote attackers to read arbitrary files in

CVE-2026-53857 HIGH POC
8.6 Jun 16

Authentication bypass in OpenClaw before 2026.5.3 allows remote attackers with low privileges to receive agent responses

CVE-2026-100530 HIGH POC
8.5 Sep 26

Directory-context bypass in OpenClaw before 2026.8.1 allows authenticated attackers with user interaction to reuse an 'a

CVE-2026-32064 HIGH POC
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Unauthenticated access to the noVNC observer interface in OpenClaw's Docker sandbox browser allows anyone who can reach

CVE-2026-32055 HIGH POC
7.6 Mar 21

OpenClaw versions before 2026.2.26 allow authenticated attackers to write arbitrary files outside the workspace director

CVE-2026-32056 HIGH POC
7.5 Mar 21

OpenClaw versions prior to 2026.2.22 contain a shell environment variable injection vulnerability in the system.run func

CVE-2026-32049 HIGH POC
7.5 Mar 21

OpenClaw versions prior to 2026.2.22 contain a resource exhaustion vulnerability where the application fails to consiste

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