CVE-2026-40151 json
PraisonAI Affected by Unauthenticated Information Disclosure of Agent Instructions via /api/agents in AgentOS
published 2026-04-09 7 mo ago modified 2026-10-26 13 d ago also EUVD-2026-21172 , GHSA-pm96-6xpr-978x , PYSEC-2026-2919
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 55%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
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.
Patch / fix
- pypi praisonai 4.5.128
- praison praisonai 4.5.128
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.76% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template PraisonAI AgentOS - Information Disclosure nuclei detection template
- github.com https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-pm96-6xpr-978x referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| GitHub | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| OSV | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | praisonai | <4.5.128 |
4.5.128 |
Affected products
- MervinPraison PraisonAI
Classification
- Weakness
-
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
-
github.com
/MervinPraison/PraisonAI/security/advisories/GHSA-pm96-6xpr-978x
web, exploit, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-40151
advisory
-
github.com
/MervinPraison/PraisonAI
package
-
pypi.org
/project/praisonai
package
-
github.com
/advisories/GHSA-pm96-6xpr-978x
advisory
Sources
- CVE List CVE-2026-40151
- GitHub Advisory GHSA-pm96-6xpr-978x
- NVD CVE-2026-40151
- OSV PYSEC-2026-2919
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.