{"apiVersion":"1.0","identifier":"CVE-2026-55529","description":"PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.58, the MCP HTTP Stream _validate_origin method accepts request_origin.startswith(allowed), so the attacker-controlled localhost.evil.example HTTP origin matches the localhost allowlist. Without an API key, a malicious webpage can submit tools/call requests to the local MCP server and execute exposed tools. This issue is fixed in version 4.6.58.","publishedAt":"2026-08-25T15:16:33","lastModifiedAt":"2026-08-27T17:18:48","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55529","cvssScore":6.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N","epssProbability":0.00124,"riskScore":0.7,"affectedProduct":"praisonai","affectedVersions":"<4.6.58","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-55529","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-55529","en":"https://www.redsauce.net/en/cves/CVE-2026-55529","fr":"https://www.redsauce.net/fr/cves/CVE-2026-55529","pt":"https://www.redsauce.net/pt/cves/CVE-2026-55529","de":"https://www.redsauce.net/de/cves/CVE-2026-55529","sk":"https://www.redsauce.net/sk/cves/CVE-2026-55529","el":"https://www.redsauce.net/el/cves/CVE-2026-55529"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-55529"}}