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GHSA-8x8f-54wf-vv92: PraisonAI Browser Server allows unauthenticated WebSocket clients to hijack connected extension sessions

April 10, 2026

praisonai browser start exposes the browser bridge on 0.0.0.0 by default, and its /ws endpoint accepts websocket clients that omit the Origin header entirely. An unauthenticated network client can connect as a fake controller, send start_session, cause the server to forward start_automation to another connected browser-extension websocket, and receive the resulting action/status stream back over that hijacked session. This allows unauthorized remote use of a connected browser automation session without any credentials.

References

  • github.com/MervinPraison/PraisonAI
  • github.com/MervinPraison/PraisonAI/releases/tag/v4.5.139
  • github.com/MervinPraison/PraisonAI/security/advisories/GHSA-8x8f-54wf-vv92
  • github.com/advisories/GHSA-8x8f-54wf-vv92

Code Behaviors & Features

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Affected versions

All versions before 1.5.140

Fixed versions

  • 1.5.140

Solution

Upgrade to version 1.5.140 or above.

Impact 9.1 CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Learn more about CVSS

Weakness

  • CWE-306: Missing Authentication for Critical Function

Source file

pypi/praisonaiagents/GHSA-8x8f-54wf-vv92.yml

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