CVE-2026-34508

| EUVD-2026-17393 MEDIUM
2026-03-31 VulnCheck
6.3
CVSS 4.0
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CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Analysis Generated
Mar 31, 2026 - 11:45 vuln.today
EUVD ID Assigned
Mar 31, 2026 - 11:45 euvd
EUVD-2026-17393
CVE Published
Mar 31, 2026 - 11:17 nvd
MEDIUM 6.3

Tags

Authentication Bypass

Description

OpenClaw before 2026.3.12 applies rate limiting only after webhook authentication succeeds, allowing attackers to bypass rate limits and brute-force webhook secrets without triggering 429 responses. Attackers can repeatedly guess invalid secrets to discover valid credentials and subsequently submit forged Zalo webhook traffic.

Analysis

OpenClaw before version 2026.3.12 allows authenticated attackers to bypass rate limiting on webhook secret validation by exploiting a logic flaw that applies rate limits only after successful authentication, enabling brute-force attacks against webhook credentials and injection of forged Zalo webhook traffic. The vulnerability requires authenticated access but results in high-confidence credential compromise.

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Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +32
POC: 0

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CVE-2026-34508 vulnerability details – vuln.today
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