CVE-2026-40157: PraisonAI is a multi-agent teams system

Q: How do I fix CVE-2026-40157?

praisonai: upgrade to 4.5.128. Exact commands for each OS are on this page.

Q: Is CVE-2026-40157 being exploited?

CVE-2026-40157 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-2026-40157 affect?

CVE-2026-40157 affects praisonai. Severity is high (CVSS 8.8). PraisonAI is a multi-agent teams system. Prior to 4.5.128, cmd_unpack in the recipe CLI extracts .praison tar archives using raw tar.extract() without validating archive member paths. A .praison bundle containing ../../ entries will write f

Q: How urgent is CVE-2026-40157?

Priority 44/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2026-40157 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 4.5.128, cmd_unpack in the recipe CLI extracts .praison tar archives using raw tar.extract() without validating archive member paths. A .praison bundle containing ../../ entries will write files outside the intended output directory. An attacker who distributes a malicious bundle can overwrite arbitrary files on the victim's filesystem when they run praisonai recipe unpack. This vulnerability is f

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	None
User interaction	Required
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-04-10
Last modified	2026-10-26

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

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-10 17:17 UTCPublished CVE record published
2026-10-26 00:10 UTCUpdated Record last modified

praison praisonai UPGRADE

Affected: < 4.5.128

Fixed in: 4.5.128

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 4.5.128 (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-2026-40157?

praisonai: upgrade to 4.5.128. Exact commands for each OS are on this page.

Is CVE-2026-40157 being exploited?

CVE-2026-40157 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-2026-40157 affect?

CVE-2026-40157 affects praisonai. Severity is high (CVSS 8.8). PraisonAI is a multi-agent teams system. Prior to 4.5.128, cmd_unpack in the recipe CLI extracts .praison tar archives using raw tar.extract() without validating archive member paths. A .praison bundle containing ../../ entries will write f

How urgent is CVE-2026-40157?

Priority 44/100. High severity; Public exploit reference

Related CVEs

CVE-2026-40088 CRITICAL 9.6 UPGRADE PraisonAI is a multi-agent teams system

References

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