CVE-2026-26319Network attack vector

Unauthenticated event forgery via fail-open webhook verification

Published Feb 19, 2026 · Updated Feb 19, 2026

Authentication bypass in OpenClaw 2026.2.13 and earlier allows remote attackers to forge Telnyx events through unsigned webhook requests. TelnyxProvider.verifyWebhook() treats requests as valid when telnyx.publicKey is absent instead of requiring Ed25519 signature verification. Exploitation requires the optional voice-call plugin to be enabled with Telnyx and its webhook reachable over the network, allowing forged events to enter call handling.

CVSS severity7.5
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in OpenClaw 2026.2.13 and earlier allows remote attackers to forge Telnyx events through unsigned webhook requests. TelnyxProvider.verifyWebhook() treats requests as valid when telnyx.publicKey is absent instead of requiring Ed25519 signature verification. Exploitation requires the optional voice-call plugin to be enabled with Telnyx and its webhook reachable over the network, allowing forged events to enter call handling.

The record

CVE
CVE-2026-26319
Published
Feb 19, 2026
Updated
Feb 19, 2026
Vendor
OpenClaw Foundation
Product
OpenClaw
Classifications
CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2026.2.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenClaw Foundation · OpenClawversion=< 2026.2.14

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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