What’s Vulnerable › Vulnerabilities

CVE-2026-28454: OpenClaw < 2026.2.2 - Authorization Bypass via Unauthenticated Telegram Webhook

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-05 · updated 2026-06-17
• Weakness: CWE-345

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.

Affected products

• OpenClaw: before 2026.2.2 — fixed in 2026.2.2

How to fix

Upgrade to a fixed version: OpenClaw 2026.2.2. Check the vendor advisory for mitigations.

References

• https://github.com/openclaw/openclaw/commit/3cbcba10cf30c2ffb898f0d8c7dfb929f15f8930
• https://github.com/openclaw/openclaw/commit/5643a934799dc523ec2ef18c007e1aa2c386b670
• https://github.com/openclaw/openclaw/commit/633fe8b9c17f02fcc68ecdb5ec212a5ace932f09
• https://github.com/openclaw/openclaw/commit/ca92597e1f9593236ad86810b66633144b69314d
• https://github.com/openclaw/openclaw/security/advisories/GHSA-fhvm-j76f-qmjv
• https://www.vulncheck.com/advisories/openclaw-authorization-bypass-via-unauthenticated-telegram-webhook

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