Information disclosure in Mervinpraison Praisonai
CVE-2026-40151
PraisonAI is a multi-agent teams system. Prior to 4.5.128, the AgentOS deployment platform exposes a GET /api/agents endpoint that returns agent names, roles, and the first 100 characters of agent system instructions to any unauthenticated caller. The AgentOS FastAPI application has no authentication middleware, no API key validation, and defaults to CORS allow_origins=["*"] with host="0.0.0.0", making every deployment network-accessible and queryable from any origin by default. This vulnerability is fixed in 4.5.128.
Vulnerability class: Information Disclosure
EPSS: 0.008 (51.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Mervinpraison Praisonai — versions < 4.5.128
- Praison Praisonai
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-40151?
- CVE-2026-40151 is a medium-severity vulnerability in Mervinpraison Praisonai, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-04-09.
- How severe is CVE-2026-40151?
- Medium severity. CVSS v3 base score is 5.3 out of 10.