CVE-2026-107294 — Pydantic AI is a Python agent framework for building applications and workflows with Generative AI.
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 v3.1 base metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HMedium severity
Band computed from the CVSS base score, not the source's own label — so it means the same thing across every feed.
AV
Network
Attack Vector
AC
Low
Attack Complexity
PR
Low
Privileges Required
UI
None
User Interaction
S
Unchanged
Scope
C
None
Confidentiality
I
None
Integrity
A
High
Availability
Affected
- Vendor
- PyPI
- Product
- pydantic-ai
Versions
- pkg:pypi/pydantic-ai >= 1.77.0, < 1.107.2
- pkg:pypi/pydantic-ai >= 2.0.0b1, < 2.24.0
- pkg:pypi/pydantic-ai-slim >= 1.77.0, < 1.107.2
- pkg:pypi/pydantic-ai-slim >= 2.0.0b1, < 2.24.0
Stated as the source expressed them.
References
- advisory[email protected]https://github.com/pydantic/pydantic-ai/commit/7a64d049c3f5271a975cd1d64b2fa876d83ede1d
- advisory[email protected]https://github.com/pydantic/pydantic-ai/commit/e3824a58c82864ed26afb2887619834a4eb86cc8
- advisory[email protected]https://github.com/pydantic/pydantic-ai/pull/7141
- advisory[email protected]https://github.com/pydantic/pydantic-ai/pull/7308
- advisory[email protected]https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.2
- advisory[email protected]https://github.com/pydantic/pydantic-ai/releases/tag/v2.24.0
- advisory[email protected]https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-v2xh-2vp8-57h8
- advisoryOSV GHSA-v2xh-2vp8-57h8https://osv.dev/vulnerability/GHSA-v2xh-2vp8-57h8
- vendorOSV packagehttps://github.com/pydantic/pydantic-ai
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