CVE-2026-40112

PraisonAI is a multi-agent teams system. Prior to 4.5.128, the Flask API endpoint in src/praisonai/api.py renders agent output as HTML without effective sanitization. The _sanitize_html function relies on the nh3 library, which is not listed as a required or optional dependency in pyproject.toml. When nh3 is absent (the default installation), the sanitizer is a no-op that returns HTML unchanged. An attacker who can influence agent input (via RAG data poisoning, web scraping results, or prompt injection) can inject arbitrary JavaScript that executes in the browser of anyone viewing the API output. This vulnerability is fixed in 4.5.128.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-cfg2-mxfj-j6pw	Exploit Vendor Advisory
https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-cfg2-mxfj-j6pw	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:praison:praisonai:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-09 22:16

Updated : 2026-06-17 10:44

NVD link : CVE-2026-40112

Mitre link : CVE-2026-40112

CVE.ORG link : CVE-2026-40112

JSON object : View

Products Affected

praison

praisonai

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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