Is this vulnerability remotely exploitable over the internet?

Yes, if the Telnyx webhook endpoint is publicly reachable (for example, via a tunnel, proxy, or direct exposure) and the Voice Call plugin is enabled without a configured Telnyx public key. In that case, a remote attacker can send forged HTTP POST requests that will be accepted as legitimate events.

Does an attacker need Telnyx credentials or access to a Telnyx account?

No. When `telnyx.publicKey` is not configured, the verification logic does not enforce the Ed25519 signature check. An attacker only needs the webhook URL and network access to it; no Telnyx account or signature is required.

What is the safest general fix pattern for this type of issue?

The most robust fix pattern is to enforce mandatory authentication for all webhook handlers and design the verification logic to fail closed. If the necessary cryptographic verification data (such as a public key) is absent or invalid, the service should refuse to start or should reject all incoming webhook requests.

Severity:

HIGH RISK

(7.5)

Missing Authentication for Telnyx Webhooks (CWE-306) in OpenClaw Voice Call Plugin

CVE-2026-26319

Published:

Feb 19, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Missing Authentication / Authorization

CWE:

CWE-306

Impact:

Unauthorized Request Forgery and Call Control

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Missing Authentication / Authorization

CWE:

CWE-306

Impact:

Unauthorized Request Forgery and Call Control

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Missing Authentication for Telnyx Webhooks (CWE-306) in OpenClaw Voice Call Plugin

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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