How severe is CVE-2026-40151?

CVE-2026-40151 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-40151 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40151?

CVE-2026-40151 affects Praison Praisonai. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40151?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-40151 have an EU (EUVD) identifier?

Yes. CVE-2026-40151 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21172.

When was CVE-2026-40151 published?

CVE-2026-40151 was published on 2026-04-09 and last updated on 2026-06-17.

CVE-2026-40151

CVE-2026-40151 is a medium-severity vulnerability in Praison Praisonai with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21172
Weakness: CWE-200
Affected product: Praison Praisonai
Published: 2026-04-09
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-40151?: CVE-2026-40151 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-40151 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40151?: CVE-2026-40151 affects Praison Praisonai. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40151?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-40151 have an EU (EUVD) identifier?: Yes. CVE-2026-40151 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21172.
When was CVE-2026-40151 published?: CVE-2026-40151 was published on 2026-04-09 and last updated on 2026-06-17.

References

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-pm96-6xpr-978x

Affected products (1)

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

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