CVE-2026-39889: PraisonAI is a multi-agent teams system

Q: How do I fix CVE-2026-39889?

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

Q: Is CVE-2026-39889 being exploited?

CVE-2026-39889 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-2026-39889 affect?

CVE-2026-39889 affects praisonai. Severity is high (CVSS 7.5). PraisonAI is a multi-agent teams system. Prior to 4.5.115, the A2U (Agent-to-User) event stream server in PraisonAI exposes all agent activity without authentication. The create_a2u_routes() function registers the following endpoints with N

Q: How urgent is CVE-2026-39889?

Priority 40/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2026-39889 is a high-severity flaw (CVSS 7.5) 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 A2U (Agent-to-User) event stream server in PraisonAI exposes all agent activity without authentication. The create_a2u_routes() function registers the following endpoints with NO authentication checks: /a2u/info, /a2u/subscribe, /a2u/events/{stream_name}, /a2u/events/sub/{id}, and /a2u/health. This vulnerability is fixed in 4.5.115.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-200
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-2026-39889?

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

Is CVE-2026-39889 being exploited?

CVE-2026-39889 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-2026-39889 affect?

CVE-2026-39889 affects praisonai. Severity is high (CVSS 7.5). PraisonAI is a multi-agent teams system. Prior to 4.5.115, the A2U (Agent-to-User) event stream server in PraisonAI exposes all agent activity without authentication. The create_a2u_routes() function registers the following endpoints with N

How urgent is CVE-2026-39889?

Priority 40/100. High severity; Remotely exploitable, no login, no user action

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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