Medium
PraisonAI Affected by Unauthenticated Information Disclosure of Agent Instructions via /api/agents in AgentOS
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-40151
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 09:29 UTC · Revision 1
Source evidence
PraisonAI Affected by Unauthenticated Information Disclosure of Agent Instructions via /api/agents in AgentOS
core-osv · Original sourcePublished 9 Apr 2026, 21:29 UTC
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.
osv:CVE-2026-40151
Complete source record
{
"id": "cf397aea76168eea37e2a4fee3fcefb39424215d18f0bab0cc5b71a079da12d7",
"url": "https://osv.dev/vulnerability/CVE-2026-40151",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "PraisonAI Affected by Unauthenticated Information Disclosure of Agent Instructions via /api/agents in AgentOS",
"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.",
"evidence": "osv:CVE-2026-40151",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-40151",
"aliases": [
"CVE-2026-40151",
"GHSA-pm96-6xpr-978x",
"PYSEC-2026-2919"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/mervinpraison/praisonai",
"type": "GIT",
"events": [
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{
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"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
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{
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"range": [
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}
],
"modified": "2026-10-28T02:30:50.338343565Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40151.json",
"https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-pm96-6xpr-978x",
"https://nvd.nist.gov/vuln/detail/CVE-2026-40151"
],
"provider_metadata": {
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"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40151.json"
}
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"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 518881,
"published_at": "2026-04-09T21:29:47.415+00:00"
}