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CVE-2026-61435— PraisonAI before 4.6.78 Authentication Bypass via Host Header Spoofing

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Call API agent invocation endpoints中存在身份验证绕过问题，当配置PRAISONAI_CALL_AUTH=disabled时，限制禁用身份验证到本地主机绑定的保护措施从客户端控制的HTTP Host头中提取绑定主机，可能导致远程未经身份验证的攻击者通过网络访问，通过发送伪造的'Host: 1

CVSS 8.2 · High EPSS 0.69% · P52

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

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-2026-61435

Vulnerability Information
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Vulnerability Title
PraisonAI before 4.6.78 Authentication Bypass via Host Header Spoofing
Source: CVE Program / CVE List V5
Vulnerability Description
PraisonAI before 4.6.78 contains an authentication bypass in the Call API agent invocation endpoints (src/praisonai/praisonai/api/agent_invoke.py) when PRAISONAI_CALL_AUTH=disabled is configured. The safeguard intended to restrict the disabled-auth opt-out to localhost binding derives the bind host from request.url.hostname, which is taken from the client-controlled HTTP Host header. A remote, unauthenticated attacker who can reach the service over the network can send a spoofed 'Host: 127.0.0.1' header to bypass the localhost-only restriction and list (GET /api/v1/agents) and invoke (POST /api/v1/agents/{agent_id}/invoke) registered agents without authentication.
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:N
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Call API agent invocation endpoints中存在身份验证绕过问题，当配置PRAISONAI_CALL_AUTH=disabled时，限制禁用身份验证到本地主机绑定的保护措施从客户端控制的HTTP Host头中提取绑定主机，可能导致远程未经身份验证的攻击者通过网络访问，通过发送伪造的'Host: 1
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-2026-61435

# 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.
Success marker: VULNERABLE: unauthenticated agent list/invoke via Host-header spoofing; proof token PROOF_7cb9d3da0fb59526 exfiltrated through /api/v1/agents/echo_agent/invoke
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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claude_code · 9743 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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III. Intelligence Information for CVE-2026-61435

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Vendor Advisories for CVE-2026-61435 (2)

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

CVE-2026-61436 8.6 HIGH PraisonAI before 4.6.78 Missing Webhook Signature Verification
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-2026-61443 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-2026-61435

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