{"cve":"CVE-2026-61427","nvd":{"published":"2026-07-15T12:18:18.260","modified":"2026-10-24T21:10:00.130","status":"Deferred","description":"PraisonAI before 4.6.78 exposes the MCP HTTP-stream transport without authentication by default: the CLI --api-key option defaults to None, and the server only enforces Authorization/Bearer checks when an API key is configured. When an operator runs 'praisonai mcp serve --transport http-stream' without an API key, an unauthenticated client (no Authorization header, and no Origin header, which is also permitted) can initialize a session, enumerate the available tools (tools/list), and invoke tools (tools/call). Additionally, the dispatcher forwards tool-call arguments to handlers without validating them against the advertised inputSchema. The server binds to 127.0.0.1 by default, so remote exploitation requires the operator to bind to a network-accessible address (e.g., --host 0.0.0.0).","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","score":6.9},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","score":7.3},"cwes":["CWE-20"],"references":["https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-hc5v-gxvj-58wh","https://www.vulncheck.com/advisories/praisonai-before-authentication-bypass-via-http-stream","https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-hc5v-gxvj-58wh"],"products":[],"source":"nvd","synced_at":"2026-10-25T17:50:08.599881581+00:00"},"epss":{"cve":"CVE-2026-61427","score":0.00427,"percentile":0.36637,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-hc5v-gxvj-58wh","url":"https://osv.dev/vulnerability/GHSA-hc5v-gxvj-58wh","summary":"PraisonAI: MCP HTTP-stream transport is unauthenticated by default, exposing tool enumeration and an unvalidated tool-call surface","modified":"2026-10-15T14:55:52.673558154Z","packages":[{"ecosystem":"PyPI","name":"praisonai","purl":"pkg:pypi/praisonai","ranges":["<4.6.78"],"fixed":["4.6.78"]}]},{"id":"PYSEC-2026-4257","url":"https://osv.dev/vulnerability/PYSEC-2026-4257","summary":"PraisonAI: MCP HTTP-stream transport is unauthenticated by default, exposing tool enumeration and an unvalidated tool-call surface","modified":"2026-10-15T14:45:12.333490734Z","packages":[{"ecosystem":"PyPI","name":"praisonai","purl":"pkg:pypi/praisonai","ranges":["<4.6.78"],"fixed":["4.6.78"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}