CVE-2026-39890

PraisonAI Affected by Remote Code Execution via YAML Deserialization in Agent Definition Loading

En bref

Sévérité: CRITICAL 9.8
EPSS: EPSS 0.58 % · centile 48 (2026-10-27)
État: PUBLISHED
Publiée: 2026-04-08
Mise à jour: 2026-04-09
Attribuée par: GitHub_M
Statut NVD: Analyzed

Description

PraisonAI is a multi-agent teams system. Prior to 4.5.115, the AgentService.loadAgentFromFile method uses the js-yaml library to parse YAML files without disabling dangerous tags (such as !!js/function and !!js/undefined). This allows an attacker to craft a malicious YAML file that, when parsed, executes arbitrary JavaScript code. An attacker can exploit this vulnerability by uploading a malicious agent definition file via the API endpoint, leading to remote code execution (RCE) on the server. This vulnerability is fixed in 4.5.115.

Scores

Version	Score	Vecteur	Évalué par
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	GitHub_M
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD · security-advisories@github.com (Secondary)

Faiblesses (CWE)

CWE-502

Avis

GHSA-32vr-5gcf-3pw2 — PraisonAI Vulnerable to Remote Code Execution via YAML Deserialization in Agent Definition Loading
PYSEC-2026-462 — PraisonAI Vulnerable to Remote Code Execution via YAML Deserialization in Agent Definition Loading

Références européennes

ENISA EUVD · EUVD-2026-20638
GCVE · GCVE-0-2026-39890

Configurations affectées (CPE NVD)

cpe:2.3:a:praison:praisonai:*:*:*:*:*:*:*:* ≤ 4.5.114

Produits affectés

Produit	Versions
MervinPraison · PraisonAI	affected < 4.5.115

Références

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-32vr-5gcf-3pw2

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD