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CVE-2026-34939

nvd nist
Published: Apr 3, 2026Modified: Jul 24, 2026

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7.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 3.9 / Impact: 3.6
Source: NVD

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.

Affected (1)

Products: Praison: Praisonai
Praison
1 product
Praisonai
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Praisonai
Before 4.5.90

Related CWEs

CWE-1333
Inefficient Regular Expression Complexity
The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.

References (1)

Source: security-advisories@github.com
ExploitVendor Advisory

Timeline

No history available yet.