---
id: CVE-2026-100527
title: >-
  OpenClaw before 2026.8.2 contains a denial of service vulnerability in the
  Browser extension relay that allows unauthenticated network sources to exhaust
  pending-authentication capacity
summary: >-
  OpenClaw before 2026.8.2 contains a denial of service vulnerability in the
  Browser extension relay that allows unauthenticated network sources to exhaust
  pending-authentication capacity. Attackers can hold every pending slot by
  maintaini…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-400
vendor: OpenClaw
product: OpenClaw
affected:
  - OpenClaw < 2026.8.2
published: '2026-09-26'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T03:16:57.910'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100527'
references:
  - url: >-
      https://github.com/openclaw/openclaw/security/advisories/GHSA-m78m-7h3q-q938
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/openclaw-before-2026.8.2-denial-of-service-via-browser-relay
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-26T03:25:24.673Z'
---

## Overview

OpenClaw before 2026.8.2 contains a denial of service vulnerability in the Browser extension relay that allows unauthenticated network sources to exhaust pending-authentication capacity. Attackers can hold every pending slot by maintaining silent WebSocket upgrades, preventing paired extensions from completing Browser Relay Authentication v2.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.