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LLMHigh

CVE-2026-40112: PraisonAI is a multi-agent teams system. Prior to 4.5.128, the Flask API endpoint in src/praisonai/a…

Occurred
Apr 9, 2026
Published
Apr 9, 2026
Source
NVD CVE

Summary

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.

Tags

  • CVE
  • CVE-2026-40112
  • cvss:MEDIUM

Classification

Category confidence: 90%
Severity confidence: 85%

Rationale: Vulnerability in multi-agent system allows XSS via unsanitized HTML output, enabling arbitrary JavaScript execution.

Classifier: Qwen/Qwen3.5-35B-A3B-FP8

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