EUVD-2026-21486

| CVE-2026-35670 MEDIUM
2026-04-10 VulnCheck
6.0
CVSS 4.0
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CVSS Vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/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
High
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

4
EUVD ID Assigned
Apr 10, 2026 - 16:30 euvd
EUVD-2026-21486
Analysis Generated
Apr 10, 2026 - 16:30 vuln.today
Patch Released
Apr 10, 2026 - 16:30 nvd
Patch available
CVE Published
Apr 10, 2026 - 16:03 nvd
MEDIUM 6.0

Tags

Authentication Bypass

Description

OpenClaw before 2026.3.22 contains a webhook reply delivery vulnerability that allows attackers to rebind chat replies to unintended users by exploiting mutable username matching instead of stable numeric user identifiers. Attackers can manipulate username changes to redirect webhook-triggered replies to different users, bypassing the intended recipient binding recorded in webhook events.

Analysis

OpenClaw before version 2026.3.22 allows authenticated attackers to redirect webhook-triggered chat replies to unintended users by exploiting username-based recipient binding instead of stable numeric identifiers. An attacker with valid credentials can manipulate username changes to rebind webhook replies intended for one user to a different user, compromising message confidentiality and integrity. …

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Priority Score

30
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +30
POC: 0

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EUVD-2026-21486 vulnerability details – vuln.today
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