{"cve":"CVE-2026-107294","nvd":{"published":"2026-10-08T17:17:15.080","modified":"2026-10-13T13:49:02.473","status":"Analyzed","description":"Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 1.77.0 until 1.107.2 and 2.24.0, web_fetch_tool, the WebFetch local fallback, and remote FileUrl media downloads buffer the complete HTTP response body before enforcing content-size controls. An attacker-influenced URL can stream an arbitrarily large response that exhausts process memory and crashes the worker; affected media types include ImageUrl, DocumentUrl, VideoUrl, and AudioUrl. SSRF protections remain effective, and the impact is limited to availability. This issue is fixed in versions 1.107.2 and 2.24.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-400"],"references":["https://github.com/pydantic/pydantic-ai/commit/7a64d049c3f5271a975cd1d64b2fa876d83ede1d","https://github.com/pydantic/pydantic-ai/commit/e3824a58c82864ed26afb2887619834a4eb86cc8","https://github.com/pydantic/pydantic-ai/pull/7141","https://github.com/pydantic/pydantic-ai/pull/7308","https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.2"],"products":["pydantic:pydantic_ai"],"source":"nvd","synced_at":"2026-10-19T22:58:01.639778232+00:00"},"epss":{"cve":"CVE-2026-107294","score":0.00437,"percentile":0.37694,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-v2xh-2vp8-57h8","url":"https://osv.dev/vulnerability/GHSA-v2xh-2vp8-57h8","summary":"Pydantic AI: Unbounded memory use when downloading remote content via web_fetch or FileUrl","modified":"2026-10-15T14:55:51.016328589Z","packages":[{"ecosystem":"PyPI","name":"pydantic-ai","purl":"pkg:pypi/pydantic-ai","ranges":[">=1.77.0 <1.107.2"],"fixed":["1.107.2"]},{"ecosystem":"PyPI","name":"pydantic-ai","purl":"pkg:pypi/pydantic-ai","ranges":[">=2.0.0b1 <2.24.0"],"fixed":["2.24.0"]},{"ecosystem":"PyPI","name":"pydantic-ai-slim","purl":"pkg:pypi/pydantic-ai-slim","ranges":[">=1.77.0 <1.107.2"],"fixed":["1.107.2"]},{"ecosystem":"PyPI","name":"pydantic-ai-slim","purl":"pkg:pypi/pydantic-ai-slim","ranges":[">=2.0.0b1 <2.24.0"],"fixed":["2.24.0"]}]},{"id":"PYSEC-2026-4280","url":"https://osv.dev/vulnerability/PYSEC-2026-4280","summary":"Pydantic AI: Unbounded memory use when downloading remote content via web_fetch or FileUrl","modified":"2026-10-15T14:55:51.016328589Z","packages":[{"ecosystem":"PyPI","name":"pydantic-ai","purl":"pkg:pypi/pydantic-ai","ranges":[">=1.77.0 <1.107.2",">=2.0.0b1 <2.24.0"],"fixed":["1.107.2","2.24.0"]}]},{"id":"PYSEC-2026-4289","url":"https://osv.dev/vulnerability/PYSEC-2026-4289","summary":"Pydantic AI: Unbounded memory use when downloading remote content via web_fetch or FileUrl","modified":"2026-10-15T14:55:51.016328589Z","packages":[{"ecosystem":"PyPI","name":"pydantic-ai-slim","purl":"pkg:pypi/pydantic-ai-slim","ranges":[">=1.77.0 <1.107.2",">=2.0.0b1 <2.24.0"],"fixed":["1.107.2","2.24.0"]}]}],"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."]}