PraisonAI CLI automatically resolves @url mentions in prompt text and can read loopback URLs into model context

Summary

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.

Timeline

1. Jul 21, 2026, 3:52 PM UTCCVE published
2. Jul 21, 2026, 5:09 PM UTCCISA SSVC assessment

   Exploitation: poc · Automatable: no · Technical impact: partial

3. Jul 21, 2026, 5:15 PM UTCRecord last updated

Affected versions

• MervinPraison PraisonAI

  fixed in 4.6.40

• MervinPraison praisonaiagents

  fixed in 1.6.40

• praisonaiPyPI

  fixed in 4.6.40

• praisonaiagentsPyPI

  fixed in 1.6.40

References 3