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CVE-2026-61436— PraisonAI before 4.6.78 Missing Webhook Signature Verification

Quick assessment

Affected
MervinPraison PraisonAI
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MervinPraison PraisonAI是MervinPraison个人开发者的 MervinPraison PraisonAI 4.6.78之前版本存在授权问题漏洞，该漏洞源于未能验证AgentMail webhook模式中的Svix webhook签名，可能导致未经身份验证的攻击者伪造message.received事件。攻击者可以向webhook端点发送特制JSON有效载荷，以调用配置的agents，使用任意发件人地址和消息内容。

CVSS 8.6 · High EPSS 0.31% · P22

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
MervinPraison PraisonAI < 4.6.78 affected
4.6.78 unaffected
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I. Basic Information for CVE-2026-61436

Vulnerability Information
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Vulnerability Title
PraisonAI before 4.6.78 Missing Webhook Signature Verification
Source: CVE Program / CVE List V5
Vulnerability Description
PraisonAI before 4.6.78 fails to verify Svix webhook signatures in AgentMail webhook mode, allowing unauthenticated attackers to forge message.received events. Attackers can send crafted JSON payloads to the webhook endpoint to invoke configured agents with arbitrary sender addresses and message content.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
MervinPraison PraisonAI 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MervinPraison PraisonAI是MervinPraison个人开发者的 MervinPraison PraisonAI 4.6.78之前版本存在授权问题漏洞，该漏洞源于未能验证AgentMail webhook模式中的Svix webhook签名，可能导致未经身份验证的攻击者伪造message.received事件。攻击者可以向webhook端点发送特制JSON有效载荷，以调用配置的agents，使用任意发件人地址和消息内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
MervinPraison PraisonAI 0 ~ 4.6.78 -

II. Public POCs for CVE-2026-61436

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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Qwen3.6-35B-A3B · 7701 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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POC zip download
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III. Intelligence Information for CVE-2026-61436

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Vendor Advisories for CVE-2026-61436 (2)

Same Patch Batch · MervinPraison · 2026-07-15 · 11 CVEs total

CVE-2026-61430 8.5 HIGH PraisonAI before 1.6.78 DNS Rebinding SSRF via web_crawl
CVE-2026-61446 8.4 HIGH PraisonAI before 1.6.78 Remote Code Execution via Plugin Auto-Discovery
CVE-2026-61435 8.2 HIGH PraisonAI before 4.6.78 Authentication Bypass via Host Header Spoofing
CVE-2026-61443 8.1 HIGH PraisonAI before 1.6.78 Remote Code Execution via SkillTools
CVE-2026-61433 7.8 HIGH PraisonAI before 4.6.78 Code Injection via API deployment generator
CVE-2026-60085 7.5 HIGH PraisonAI before 4.6.78 Unenforced Security Policy in Subprocess Sandbox
CVE-2026-61427 7.3 HIGH PraisonAI before 4.6.78 Authentication Bypass via HTTP-stream
CVE-2026-61438 7.3 HIGH PraisonAI before 4.6.78 Remote Code Execution via Broken AST Sandbox
CVE-2026-61440 6.5 MEDIUM PraisonAI Platform before 0.1.9 Authorization Bypass via Label Endpoints
CVE-2026-60087 6.1 MEDIUM PraisonAI before 1.6.78 Tool Approval Cache Bypass

IV. Related Vulnerabilities

Same product: PraisonAI
Same vendor: MervinPraison
Same weakness: CWE-287

V. Comments for CVE-2026-61436

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