GHSA-x227-pf99-vffg: praisonaiagents (CVE-2026-57123)

PraisonAI: MCP SSE transport binds 0.0.0.0 with no authentication and no Origin validation; bundled SecurityConfig is never wired in

CVSS 9.8 CriticalCriticalEPSS 0.0090 · 59th percentile

Critical, because:

CVSS score 9.8: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 18 Jun 2026, 13:55 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
praisonaiagents	PyPI	<1.6.59	1.6.59

Identifiers

GHSA-x227-pf99-vffg · CVE-2026-57123 · PYSEC-2026-3536

Weakness (CWE)

CWE-306 · CWE-350 · CWE-1327

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

PraisonAI's MCP SSE server (praisonaiagents, versions before 1.6.59) binds to 0.0.0.0 by default and has no authentication or Origin validation, though its bundled security controls are never called. Any host that can reach the port can list and invoke registered tools without credentials, and a malicious web page can exploit a localhost instance through DNS rebinding. Upgrade to praisonaiagents 1.6.59 or later.

Written 5 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
9.8	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0090, the 59th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:41 UTC First seen by agentprime
31 Oct 2026, 14:41 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.