CVE-2026-28465
Received Received - Intake
Improper Authentication in OpenClaw Voice-Call Plugin Enables Webhook Spoofing

Publication date: 2026-03-05

Last updated on: 2026-03-10

Assigner: VulnCheck

Description
OpenClaw's voice-call plugin versions before 2026.2.3 contain an improper authentication vulnerability in webhook verification that allows remote attackers to bypass verification by supplying untrusted forwarded headers. Attackers can spoof webhook events by manipulating Forwarded or X-Forwarded-* headers in reverse-proxy configurations that implicitly trust these headers.
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Meta Information
Published
2026-03-05
Last Modified
2026-03-10
Generated
2026-06-16
AI Q&A
2026-03-06
EPSS Evaluated
2026-06-15
NVD
CVE-2026-28465
EUVD
EUVD-2026-9911
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
openclaw openclaw to 2026.2.3 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-345 The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.
CWE-290 This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.
Attack-Flow Graph
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Executive Summary

This vulnerability exists in OpenClaw's voice-call plugin versions before 2026.2.3. It is an improper authentication vulnerability related to webhook verification. Specifically, remote attackers can bypass the verification process by supplying untrusted forwarded headers such as Forwarded or X-Forwarded-* headers. This is possible in reverse-proxy configurations that implicitly trust these headers, allowing attackers to spoof webhook events.

Impact Analysis

The impact of this vulnerability is that attackers can remotely bypass webhook verification and spoof webhook events. This means unauthorized or malicious webhook events could be accepted as legitimate, potentially leading to unauthorized actions or data manipulation within systems relying on these webhooks.

Compliance Impact

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Detection Guidance

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