CVE-2026-39891

Name: CVE-2026-39891
Creator: NVD / NIST
Published: 2026-04-08T21:17:01.403+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.56%

Last modified Jun 17, 2026

CVE-2026-39891 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 0.56% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.56%

42.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-94

Affected Software

Vendor	Product	Versions
Praison	Praisonai	<= 4.5.114

References

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-hwg5-x759-7wjgExploit, Vendor Advisory
https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-hwg5-x759-7wjgExploit, Vendor Advisory

Timeline

Published: Apr 8, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-39891?

How severe is CVE-2026-39891?

CVE-2026-39891 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.56% probability of exploitation in the next 30 days.

How do I fix CVE-2026-39891?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-39891?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST