Unauthenticated agent invocation via Host header spoofing
Published Jul 15, 2026 · Updated Jul 15, 2026
Authentication bypass in PraisonAI before 4.6.78 allows remote attackers to list and invoke registered agents without credentials. verify_token() in src/praisonai/praisonai/api/agent_invoke.py treats request.url.hostname, derived from the client-controlled Host header, as the server's bind host. Exploitation requires PRAISONAI_CALL_AUTH=disabled and network access to the service; a spoofed Host header reaches agent listing and invocation, while further impact depends on each agent's tools and context.
Summary
What happened
Authentication bypass in PraisonAI before 4.6.78 allows remote attackers to list and invoke registered agents without credentials. verify_token() in src/praisonai/praisonai/api/agent_invoke.py treats request.url.hostname, derived from the client-controlled Host header, as the server's bind host. Exploitation requires PRAISONAI_CALL_AUTH=disabled and network access to the service; a spoofed Host header reaches agent listing and invocation, while further impact depends on each agent's tools and context.
The record
- CVE
- CVE-2026-61435
- Published
- Jul 15, 2026
- Updated
- Jul 15, 2026
- Vendor
- PraisonAI
- Product
- PraisonAI
- Classifications
- CWE-287, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 15, 2026CVE publishedPublication date reported by the CVE source.
- 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.
- Affected versionversion=0 <4.6.78
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Public exploit references
- GHSA-2gpf-2492-q9jh Host-header bypass proof of vulnerabilityproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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