What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-15 · updated 2026-10-24
• Weakness: CWE-287

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.

Affected products

• MervinPraison PraisonAI: before 4.6.78 — fixed in 4.6.78

How to fix

Upgrade to a fixed version: MervinPraison PraisonAI 4.6.78. Check the vendor advisory for mitigations.

References

• https://github.com/MervinPraison/PraisonAI/commit/2a855c470077c7d2e2479a575f7ef7f548d51c33
• https://github.com/MervinPraison/PraisonAI/commit/846568c7a5d8ce9e71e56e4c213f027c04909753
• https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-2gpf-2492-q9jh
• https://www.vulncheck.com/advisories/praisonai-before-authentication-bypass-via-host-header-spoofing
• https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-2gpf-2492-q9jh

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