Skip to content
OpenAdvisories
Critical · 9.1 CVE-2026-55536 EUVD-2026-65545GHSA-6g6r-q6gw-w8fgPYSEC-2026-3886

Browser Server WebSocket origin validation bypass via unanchored regex (patch bypass of CVE-2026-40289 / GHSA-8x8f-54wf-vv92)

Published Aug 25, 2026 · Updated Aug 28, 2026 · Assigned by GitHub_M

Description

PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.58, Browser Server _handle_connection() checks Chrome extension origins with re.match() and the unanchored expression chrome-extension://[a-z0-9]{32}. Extra trailing characters pass before websocket.accept(), allowing start_session commands and unauthorized browser automation. This issue is fixed in version 4.6.58.

Affected products

VendorProductAffectedFixed
MervinPraison PraisonAI < 4.6.58 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI praisonai < 4.6.58 4.6.58 GHSA-6g6r-q6gw-w8fg

References