All vulnerabilities
CVE-2026-100527GHSA-m78m-7h3q-q938

OpenClaw before 2026.8.2 Denial of Service via Browser Relay

OpenClaw OpenClaw
Open in ThreatlineRecord JSON
CVSS
6.9Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.35%Chance of exploitation activity in the next 30 days, higher than 27% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2026.8.2Fixed versionCVE List
Published26 Sep 2026Updated 5 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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.

Text from CVE List

Affected versions 2

  • OpenClawaffected: all versions before 2026.8.2CVE List
  • OpenClawunaffected: 2026.8.2CVE List

References 2