MervinPraison PraisonAI/praisonaiagents CLI urllib.request.urlopen injection

Summaryinfo

A vulnerability identified as critical has been detected in MervinPraison PraisonAI and praisonaiagents. This vulnerability affects the function urllib.request.urlopen of the component CLI. This manipulation causes injection. This vulnerability is tracked as CVE-2026-47395. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in MervinPraison PraisonAI and praisonaiagents (affected version not known). It has been declared as critical. Affected by this vulnerability is the function urllib.request.urlopen of the component CLI. The manipulation with an unknown input leads to a injection vulnerability. The CWE definition for the vulnerability is CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

PraisonAI is a multi-agent teams system. Prior to version 4.6.40 of PraisonAI, corresponding to version 1.6.40 of praisonaiagents, PraisonAI's direct-prompt CLI automatically expands `@url:` mentions in raw prompt text before agent execution begins. If a prompt contains `@url:<http-or-https-url>`, the CLI calls `MentionsParser.process(...)`. The `@url:` handler then performs a direct `urllib.request.urlopen()` request to the attacker-controlled URL and returns the response body. That response body is prepended to the final model prompt context. There is no loopback/private-address restriction, no metadata-service restriction, and no approval gate before the fetch. As a result, attacker-influenced prompt text can cause the operator's machine to fetch localhost-only HTTP resources and inject the response into model context. PraisonAI version 4.6.40 and praisonaiagents version 1.6.40 contain a fix.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-47395 since 05/19/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/21/2026). MITRE ATT&CK project uses the attack technique T1055 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• MervinPraison

Name

• PraisonAI
• praisonaiagents

Website

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

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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