OpenClaw < 2026.2.2 - Authorization Bypass via Unauthenticated Telegram Webhook | Advisories

Advisories

OpenClaw < 2026.2.2 - Authorization Bypass via Unauthenticated Telegram Webhook

severity: high
date: 3/5/2026
Affecting: OpenClaw < 2026.2.2
CVE: CVE-2026-28454
CWE: CWE-345 Insufficient Verification of Data Authenticity
CVSS: 8.2
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
References: GitHub Security Advisory (GHSA-fhvm-j76f-qmjv)
Patch Commit
Hardening Commit #1
Hardening Commit #2
Hardening Commit #3
Credit: Petr Simecek (@simecek), Stanislav Fort, Aisle Research, www.aisle.com
Description: OpenClaw versions prior to 2026.2.2 fail to validate webhook secrets in Telegram webhook mode (must be enabled), allowing unauthenticated HTTP POST requests to the webhook endpoint that trust attacker-controlled JSON payloads. Remote attackers can forge Telegram updates by spoofing message.from.id and chat.id fields to bypass sender allowlists and execute privileged bot commands.

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