CVE-2026-55536
Critical
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.
SeverityCritical
CVSS9.1
Exploit probability—
ProductPraisonai
PublishedAug 25, 2026
First seenAug 25, 2026
Weakness typeCWE-284Improper access controlCWE-625CWE-625
How to fix
Update
- praisonai4.6.58 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| praisonaiPyPI | v < 4.6.58 | 4.6.58 |
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