{"id":"CVE-2026-107295","revision":"33f9f7bcca28437c98e05764bb8b153a","records":[{"revision":"33f9f7bcca28437c98e05764bb8b153a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-107295","aliases":[],"title":"`pydantic-ai-slim` web UI `/api/chat` accepts browser-simple cross-origin requests that can trigger agent tool execution","description":"Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 1.34.0 until 1.107.4 and 2.28.0, the Agent.to_web() and clai web development chat endpoint has missing request content-type validation. A website visited by a developer can submit a browser-compatible request to a loopback-hosted chat server, causing the served agent to run and execute tools with the privileges and credentials of the local process; client-relayed approval decisions also leave requires_approval=True tools exposed. Binding to localhost does not prevent a browser page from reaching the loopback address. This issue is fixed in versions 1.107.4 and 2.28.0.","state":0,"publishedAt":"2026-10-08T17:02:36.718+00:00","modifiedAt":"2026-10-08T17:53:29.464+00:00","affected":[{"ecosystem":"Vendor product","name":"pydantic-ai","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"pydantic\",\n                    \"product\": \"pydantic-ai\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 1.34.0, < 1.107.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 2.0.0b1, < 2.28.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"pydantic-ai-slim","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"pydantic\",\n                    \"product\": \"pydantic-ai-slim\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 1.34.0, < 1.107.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 2.0.0b1, < 2.28.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L","score":7.6,"severity":"HIGH"}],"references":["https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-h4xc-3qfq-jf93","https://github.com/pydantic/pydantic-ai/pull/7382","https://github.com/pydantic/pydantic-ai/pull/7383","https://github.com/pydantic/pydantic-ai/commit/d2690201a1834005d382dbf5c47e0ed94ef8bf46","https://github.com/pydantic/pydantic-ai/commit/dd2abbdfa029c9ad138e7cc0edd2eaeaf9ed69c0","https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.4","https://github.com/pydantic/pydantic-ai/releases/tag/v2.28.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-107295","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-107295","identifiers":["CVE-2026-107295"]},"retained":false,"historicalAffected":[]}],"coverage":[]}