CVE-2026-39891: PraisonAI is a multi-agent teams system

Q: How do I fix CVE-2026-39891?

praisonai: upgrade to newer than 4.5.114. Exact commands for each OS are on this page.

Q: Is CVE-2026-39891 being exploited?

CVE-2026-39891 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-39891 affect?

CVE-2026-39891 affects praisonai. Severity is high (CVSS 8.8). 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 direc

Q: How urgent is CVE-2026-39891?

Priority 47/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2026-39891 is a high-severity flaw (CVSS 8.8) affecting praisonai. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-94
Published	2026-04-08
Last modified	2026-07-24

Publisher (CNA): GitHub, Inc. · Vendor: praison

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 21:17 UTCPublished CVE record published
2026-07-24 21:10 UTCUpdated Record last modified

praison praisonai UPGRADE

Affected: <= 4.5.114

Fixed in: newer than 4.5.114

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy praisonai || rpm -q praisonai || praisonai --version

2. UPGRADE to newer than 4.5.114 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade praisonai

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade praisonai

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-39891?

praisonai: upgrade to newer than 4.5.114. Exact commands for each OS are on this page.

Is CVE-2026-39891 being exploited?

CVE-2026-39891 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-39891 affect?

CVE-2026-39891 affects praisonai. Severity is high (CVSS 8.8). 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 direc

How urgent is CVE-2026-39891?

Priority 47/100. High severity; Public exploit reference

Related CVEs

CVE-2026-40288 CRITICAL 9.8 UPGRADE UPGRADE PraisonAI is a multi-agent teams system
CVE-2026-40289 CRITICAL 9.1 UPGRADE UPGRADE PraisonAI is a multi-agent teams system
CVE-2026-40315 CRITICAL 9.8 UPGRADE PraisonAI is a multi-agent teams system
CVE-2026-40116 HIGH 7.5 UPGRADE PraisonAI is a multi-agent teams system
CVE-2026-40113 HIGH 8.4 UPGRADE PraisonAI is a multi-agent teams system

References

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