MervinPraison PraisonAI up to 4.5.127 _safe_extractall data amplification

Summaryinfo

A vulnerability was found in MervinPraison PraisonAI up to 4.5.127 and classified as problematic. This impacts the function _safe_extractall. Executing a manipulation can lead to data amplification. The identification of this vulnerability is CVE-2026-40148. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in MervinPraison PraisonAI up to 4.5.127. It has been declared as problematic. This vulnerability affects the function _safe_extractall. The manipulation with an unknown input leads to a data amplification vulnerability. The CWE definition for the vulnerability is CWE-409. The product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output. As an impact it is known to affect availability. CVE summarizes:

PraisonAI is a multi-agent teams system. Prior to 4.5.128, the _safe_extractall() function in PraisonAI's recipe registry validates archive members against path traversal attacks but performs no checks on individual member sizes, cumulative extracted size, or member count before calling tar.extractall(). An attacker can publish a malicious recipe bundle containing highly compressible data (e.g., 10GB of zeros compressing to ~10MB) that exhausts the victim's disk when pulled via LocalRegistry.pull() or HttpRegistry.pull(). This vulnerability is fixed in 4.5.128.

The advisory is available at github.com. This vulnerability was named CVE-2026-40148 since 04/09/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 4.5.128 eliminates this vulnerability.

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Productinfo

Vendor

• MervinPraison

Name

• PraisonAI

Version

• 4.5.127

Website

• Product: https://github.com/MervinPraison/PraisonAI/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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