CVE-2026-40115

Medium

Description

PraisonAI is a multi-agent teams system. Prior to 4.5.128, the WSGI-based recipe registry server (server.py) reads the entire HTTP request body into memory based on the client-supplied Content-Length header with no upper bound. Combined with authentication being disabled by default (no token configured), any local process can send arbitrarily large POST requests to exhaust server memory and cause a denial of service. The Starlette-based server (serve.py) has RequestSizeLimitMiddleware with a 10MB limit, but the WSGI server lacks any equivalent protection. This vulnerability is fixed in 4.5.128.

SeverityMedium

CVSS6.2

Exploit probability—

ProductPraisonai

PublishedApr 9, 2026

First seenApr 9, 2026

Weakness typeCWE-770Allocation of resources without limits

How to fix

Update

praison praisonai4.5.128 or later
praisonai4.5.128 or later

Affected products

Product	Affected versions	Fixed in
praison praisonai	v < 4.5.128	4.5.128
praisonaiPyPI	v < 4.5.128	4.5.128

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