CVE-2026-61427Network attack vector

Unauthenticated tool access via optional API key

Published Jul 15, 2026 · Updated Jul 15, 2026

Authentication bypass in PraisonAI before 4.6.78 allows remote attackers to enumerate and invoke MCP tools through HTTP-stream requests. The mcp_post path skips bearer-token checks when api_key is None, while the dispatcher forwards tool arguments without validating the advertised inputSchema. Remote reachability requires an operator to run the transport without an API key and bind it beyond the default 127.0.0.1 address; confirmed impact excludes arbitrary code execution and file reads.

CVSS severityUnavailable
Unscored
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in PraisonAI before 4.6.78 allows remote attackers to enumerate and invoke MCP tools through HTTP-stream requests. The mcp_post path skips bearer-token checks when api_key is None, while the dispatcher forwards tool arguments without validating the advertised inputSchema. Remote reachability requires an operator to run the transport without an API key and bind it beyond the default 127.0.0.1 address; confirmed impact excludes arbitrary code execution and file reads.

The record

CVE
CVE-2026-61427
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
Mervin Praison
Product
PraisonAI
Classifications
T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 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=0 <4.6.78

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mervin Praison · PraisonAIversion=0 <4.6.78

Published CVSS scores

No CVSS assessment is available in this record.

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

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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