CVE-2026-56076

High

Description

PraisonAI before 1.5.128 contains a cross-origin agent execution vulnerability in the AGUI endpoint that allows remote attackers to trigger arbitrary agent execution. The POST /agui endpoint lacks authentication and hardcodes Access-Control-Allow-Origin: * headers, combined with Starlette's Content-Type-agnostic JSON parsing, enabling attackers to bypass CORS preflight checks via simple requests and exfiltrate sensitive agent responses including tool execution results and environment data.

SeverityHigh

CVSS8.1

Exploit probability—

ProductPraisonAI

PublishedJun 18, 2026

First seenJun 18, 2026

Weakness typeCWE-942CWE-942

How to fix

Update

PraisonAI PraisonAI1.5.128 or later

Vendor advisories

github.com/MervinPraison/PraisonAI/security/advisories/GHSA-x462-jjpc-q4q4

Affected products

Product	Affected versions	Fixed in
PraisonAI PraisonAI	v < 1.5.128	1.5.128

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