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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 6
https://github.com/openclaw/openclaw/commit/3cbcba10cf30c2ffb898f0d8c7dfb929f15…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/commit/5643a934799dc523ec2ef18c007e1aa2c38…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/commit/633fe8b9c17f02fcc68ecdb5ec212a5ace9…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/commit/ca92597e1f9593236ad86810b66633144b6…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/security/advisories/GHSA-fhvm-j76f-qmjv
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/openclaw-authorization-bypass-via-unauthen…
disclosure@vulncheck.com