CVE-2026-39891: PraisonAI has a Template Injection in Agent Tool Definitions

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-04-08 · updated 2026-07-24
Weakness: CWE-94

Description

PraisonAI is a multi-agent teams system. Prior to 4.5.115, the create_agent_centric_tools() function returns tools (like acp_create_file) that process file content using template rendering. When user input from agent.start() is passed directly into these tools without escaping, template expressions in the input are executed rather than treated as literal text. This vulnerability is fixed in 4.5.115.

Affected products

MervinPraison PraisonAI: through 4.5.114

References

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-hwg5-x759-7wjg
https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-hwg5-x759-7wjg

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