CVE-2026-57134Public exploitNetwork attack vectorHinoki check available

Unauthenticated MCP access via skipped credential validation

Published Sep 15, 2026 · Updated Sep 15, 2026

Improper authentication in PraisonAI 1.5.1 through 1.7.1 allows remote attackers to access protected MCP tools and resources. MCPSecurity.evaluatePolicy() calls the configured validator only for API-key and bearer policies, so Basic and OAuth policies treat any non-empty Authorization header as authenticated. The bypass requires a downstream application configured to protect an MCP endpoint with Basic or OAuth and permits reading protected resources or invoking exposed tools.

CVSS severity8.2
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper authentication in PraisonAI 1.5.1 through 1.7.1 allows remote attackers to access protected MCP tools and resources. MCPSecurity.evaluatePolicy() calls the configured validator only for API-key and bearer policies, so Basic and OAuth policies treat any non-empty Authorization header as authenticated. The bypass requires a downstream application configured to protect an MCP endpoint with Basic or OAuth and permits reading protected resources or invoking exposed tools.

The record

CVE
CVE-2026-57134
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
PraisonAI
Product
PraisonAI
Classifications
CWE-287, CWE-288, CWE-863, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1.5.1, < 1.7.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PraisonAI · PraisonAIversion=>= 1.5.1, < 1.7.2

Published CVSS scores

8.2GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
CWE-288Authentication Bypass Using an Alternate Path or Channel
CWE-863Incorrect Authorization
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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