{"id":"CVE-2026-107294","title":"Pydantic AI is a Python agent framework for building applications and workflows with Generative AI","summary":"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…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-400","CWE-770"],"vendor":"pydantic","product":"pydantic_ai","affected":["pydantic_ai >= 1.77.0, < 1.107.2","pydantic_ai >= 2.0.0, < 2.24.0"],"patched":["pydantic_ai 2.24.0"],"published":"2026-10-08","updated":"2026-10-13","sourceUpdated":"2026-10-13T13:49:02.473","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-107294","references":[{"url":"https://github.com/pydantic/pydantic-ai/commit/7a64d049c3f5271a975cd1d64b2fa876d83ede1d","label":"security-advisories@github.com"},{"url":"https://github.com/pydantic/pydantic-ai/commit/e3824a58c82864ed26afb2887619834a4eb86cc8","label":"security-advisories@github.com"},{"url":"https://github.com/pydantic/pydantic-ai/pull/7141","label":"security-advisories@github.com"},{"url":"https://github.com/pydantic/pydantic-ai/pull/7308","label":"security-advisories@github.com"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.2","label":"security-advisories@github.com"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.24.0","label":"security-advisories@github.com"},{"url":"https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-v2xh-2vp8-57h8","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-v2xh-2vp8-57h8"},{"url":"https://github.com/pydantic/pydantic-ai"},{"url":"https://pypi.org/project/pydantic-ai"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107294"},{"url":"https://pypi.org/project/pydantic-ai-slim"}],"tags":["nvd","ghsa","pip","cve.org","osv"],"epss":0.00437,"epssPercentile":0.37789,"aliases":["GHSA-v2xh-2vp8-57h8","PYSEC-2026-4280","PYSEC-2026-4289"],"ecosystem":"pip","ingestedAt":"2026-10-08T17:56:11.713Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-08T20:23:19.119515Z"},"slug":"CVE-2026-107294","body":"## Overview\n\nPydantic 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.\n\n## Affected\n\n- `pydantic_ai >= 1.77.0, < 1.107.2`\n- `pydantic_ai >= 2.0.0, < 2.24.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `pydantic_ai 2.24.0`\n\n## Package advisory (CVE-2026-107294)\n\nAffected packages:\n\n- `pydantic-ai >= 1.77.0, < 1.107.2`\n- `pydantic-ai >= 2.0.0b1, <= 2.23.0`\n- `pydantic-ai-slim >= 1.77.0, < 1.107.2`\n- `pydantic-ai-slim >= 2.0.0b1, <= 2.23.0`\n\nPatched in:\n\n- `pydantic-ai 1.107.2`\n- `pydantic-ai 2.24.0`\n- `pydantic-ai-slim 1.107.2`\n- `pydantic-ai-slim 2.24.0`\n\nSource: https://github.com/advisories/GHSA-v2xh-2vp8-57h8","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}