CVE-2026-35628

OpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in Telegram webhook authentication that allows attackers to brute-force weak webhook secrets. The vulnerability enables repeated authentication guesses without throttling, permitting attackers to systematically guess webhook secrets through brute-force attacks.

CVSS v3 4.8 MEDIUM

4.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/openclaw/openclaw/commit/c2c136ae9517ddd0789d742a0fdf4c10e8c729a7	Patch
https://github.com/openclaw/openclaw/security/advisories/GHSA-vcx4-4qxg-mfp4	Vendor Advisory
https://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-telegram-webhook-rate-limiting	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*

History

15 Apr 2026, 20:38

Type	Values Removed	Values Added
CPE		cpe:2.3:a:openclaw:openclaw::::::node.js::*
First Time		Openclaw openclaw Openclaw
References	~~() https://github.com/openclaw/openclaw/commit/c2c136ae9517ddd0789d742a0fdf4c10e8c729a7 -~~	() https://github.com/openclaw/openclaw/commit/c2c136ae9517ddd0789d742a0fdf4c10e8c729a7 - Patch
References	~~() https://github.com/openclaw/openclaw/security/advisories/GHSA-vcx4-4qxg-mfp4 -~~	() https://github.com/openclaw/openclaw/security/advisories/GHSA-vcx4-4qxg-mfp4 - Vendor Advisory
References	~~() https://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-telegram-webhook-rate-limiting -~~	() https://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-telegram-webhook-rate-limiting - Third Party Advisory

09 Apr 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-09 22:16

Updated : 2026-04-15 20:38

NVD link : CVE-2026-35628

Mitre link : CVE-2026-35628

CVE.ORG link : CVE-2026-35628

JSON object : View

Products Affected

openclaw

openclaw

CWE

CWE-307

Improper Restriction of Excessive Authentication Attempts

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