Description

PraisonAI is a multi-agent teams system. Prior to version 4.5.90, MCPToolIndex.search_tools() compiles a caller-supplied string directly as a Python regular expression with no validation, sanitization, or timeout. A crafted regex causes catastrophic backtracking in the re engine, blocking the Python thread for hundreds of seconds and causing a complete service outage. This issue has been patched in version 4.5.90.

INFO

Published Date :

2026-04-03T22:52:32.763Z

Last Modified :

2026-04-06T19:05:34.164Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-34939 vulnerability.

Vendors Products
Mervinpraison
  • Praisonai
Praison
  • Praisonai
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-34939.

URL Resource
https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-8w9j-hc3g-3g7f cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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