Critical severity · published Mar 5, 2026
CVE-2026-28454
OpenClaw < 2026.2.2 - Authorization Bypass via Unauthenticated Telegram Webhook
9.8
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
OpenClaw · OpenClaw
before 2026.2.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28454
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-28454
Patch
https://github.com/openclaw/openclaw/commit/3cbcba10cf30c2ffb898f0d8c7dfb929f15f8930
Patch
https://github.com/openclaw/openclaw/commit/5643a934799dc523ec2ef18c007e1aa2c386b670
Patch
https://github.com/openclaw/openclaw/commit/633fe8b9c17f02fcc68ecdb5ec212a5ace932f09
Patch
https://github.com/openclaw/openclaw/commit/ca92597e1f9593236ad86810b66633144b69314d
Mitigation
https://github.com/openclaw/openclaw/security/advisories/GHSA-fhvm-j76f-qmjv
Third Party Advisory
https://www.vulncheck.com/advisories/openclaw-authorization-bypass-via-unauthenticated-telegram-webhook
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