OpenClaw up to 2026.3.21 Untrusted Page verification of source

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in OpenClaw up to 2026.3.21. Affected by this vulnerability is an unknown functionality of the component Untrusted Page Handler. Executing a manipulation can lead to verification of source. The identification of this vulnerability is CVE-2026-35643. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in OpenClaw up to 2026.3.21. It has been declared as critical. This vulnerability affects an unknown part of the component Untrusted Page Handler. The manipulation with an unknown input leads to a verification of source vulnerability. The CWE definition for the vulnerability is CWE-940. The product establishes a communication channel to handle an incoming request that has been initiated by an actor, but it does not properly verify that the request is coming from the expected origin. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

OpenClaw before 2026.3.22 contains an unvalidated WebView JavascriptInterface vulnerability allowing attackers to inject arbitrary instructions. Untrusted pages can invoke the canvas bridge to execute malicious code within the Android application context.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-35643 since 04/04/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

Upgrading to version 2026.3.22 eliminates this vulnerability. Applying the patch 630f1479c44f78484dfa21bb407cbe6f171dac87 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0856). Once again VulDB remains the best source for vulnerability data.

Affected

  • Open Source OpenClaw

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Verification of source
CWE: CWE-940
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: OpenClaw 2026.3.22
Patch: 630f1479c44f78484dfa21bb407cbe6f171dac87

Timelineinfo

04/04/2026 CVE reserved
04/10/2026 +6 days Advisory disclosed
04/10/2026 +0 days VulDB entry created
04/13/2026 +3 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-cxmw-p77q-wchg
Status: Confirmed

CVE: CVE-2026-35643 (🔒)
GCVE (CVE): GCVE-0-2026-35643
GCVE (VulDB): GCVE-100-356884
CERT Bund: WID-SEC-2026-0856 - OpenClaw: Mehrere Schwachstellen

Entryinfo

Created: 04/10/2026 20:24
Updated: 04/13/2026 10:18
Changes: 04/10/2026 20:24 (78), 04/13/2026 10:18 (7)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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