CVE-2026-28446
Received Received - Intake

Authentication Bypass in OpenClaw Voice-Call Extension Enables Remote Access

Publication date: 2026-03-05

Last updated on: 2026-03-11

Assigner: VulnCheck

Description
OpenClaw versions prior to 2026.2.1 with the voice-call extension installed and enabled contain an authentication bypass vulnerability in inbound allowlist policy validation that accepts empty caller IDs and uses suffix-based matching instead of strict equality. Remote attackers can bypass inbound access controls by placing calls with missing caller IDs or numbers ending with allowlisted digits to reach the voice-call agent and execute tools.

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Meta Information

Published
2026-03-05
Last Modified
2026-03-11
Generated
2026-07-06
AI Q&A
2026-03-06
EPSS Evaluated
2026-07-05
NVD
CVE-2026-28446
EUVD
EUVD-2026-9896

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
openclaw openclaw to 2026.2.2 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-303 The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect.

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Executive Summary

This vulnerability exists in OpenClaw versions prior to 2026.2.1 when the voice-call extension is installed and enabled. It is an authentication bypass issue in the inbound allowlist policy validation. Specifically, the system accepts calls with empty caller IDs and uses suffix-based matching instead of strict equality to validate caller IDs. This allows remote attackers to bypass inbound access controls by placing calls with missing caller IDs or numbers that end with digits on the allowlist, thereby gaining unauthorized access to the voice-call agent and the ability to execute tools.

Impact Analysis

The vulnerability can have severe impacts as it allows remote attackers to bypass inbound access controls and gain unauthorized access to the voice-call agent. This can lead to unauthorized execution of tools, potentially compromising the system's integrity, confidentiality, and availability.

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