CVE-2026-57112Public exploitNetwork attack vectorHinoki check available

Tool invocation via unguarded legacy SSE endpoints

Published Sep 15, 2026 · Updated Sep 15, 2026

Origin validation errors in PraisonAI 3.10.0 through 4.6.58 and praisonaiagents 0.6.0 through 1.6.58 allow remote attackers to invoke tools. ToolsMCPServer.run_sse mounts the legacy /sse and /messages/ endpoints without validating Host or Origin and without requiring authentication. Exploitation requires a running local or internal SSE server and user interaction with a malicious website; invoked tools run with the server user's privileges.

CVSS severity8.3
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Origin validation errors in PraisonAI 3.10.0 through 4.6.58 and praisonaiagents 0.6.0 through 1.6.58 allow remote attackers to invoke tools. ToolsMCPServer.run_sse mounts the legacy /sse and /messages/ endpoints without validating Host or Origin and without requiring authentication. Exploitation requires a running local or internal SSE server and user interaction with a malicious website; invoked tools run with the server user's privileges.

The record

CVE
CVE-2026-57112
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Mervin Praison
Product
PraisonAI
Classifications
CWE-862, CWE-306, CWE-346, T1189
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=>= 3.10.0, < 4.6.59

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mervin Praison · PraisonAIversion=>= 3.10.0, < 4.6.59
Mervin Praison · praisonaiagentsversion=>= 0.6.0, < 1.6.59

Published CVSS scores

8.3GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

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 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 exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
CWE-306Missing Authentication for Critical Function
CWE-346Origin Validation Error
T1189Drive-by Compromise

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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