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Advisory record · GHSA-32vr-5gcf-3pw2

PraisonAI Vulnerable to Remote Code Execution via YAML Deserialization in Agent Definition Loading

CVSS 9.8 CriticalCriticalEPSS 0.0059 · 48th percentile

Critical, because:

  • CVSS score 9.8: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 29 Jun 2026, 11:50 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
praisonaiPyPI<4.5.1154.5.115
Identifiers
GHSA-32vr-5gcf-3pw2 · CVE-2026-39890 · PYSEC-2026-462
Weakness (CWE)
CWE-502
Tags
Published
29 Jun 2026
Updated
13 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Versions of the praisonai package before 4.5.115 are vulnerable. The AgentService.loadAgentFromFile method parses YAML with js-yaml without a safe schema, so a crafted agent definition file can run arbitrary JavaScript when loaded. An attacker who can upload agent definitions through an API endpoint, which may need no authentication if the endpoint is unprotected, can execute code on the server. Upgrade to praisonai 4.5.115 or later. Until then, restrict agent definition uploads to trusted users.

Written 6 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.8 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0059, the 48th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:04 UTC First seen by agentprime
  2. 31 Oct 2026, 15:04 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.