cve.bz

CVE-2026-107294

6.5 mediumEPSS 0.4%

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 3.1
6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS
0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-25)
CWE
CWE-400
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-v2xh-2vp8-57h8PyPIpydantic-ai>=1.77.0 <1.107.21.107.2
GHSA-v2xh-2vp8-57h8PyPIpydantic-ai>=2.0.0b1 <2.24.02.24.0
GHSA-v2xh-2vp8-57h8PyPIpydantic-ai-slim>=1.77.0 <1.107.21.107.2
GHSA-v2xh-2vp8-57h8PyPIpydantic-ai-slim>=2.0.0b1 <2.24.02.24.0
PYSEC-2026-4280PyPIpydantic-ai>=1.77.0 <1.107.2
>=2.0.0b1 <2.24.0		1.107.2, 2.24.0
PYSEC-2026-4289PyPIpydantic-ai-slim>=1.77.0 <1.107.2
>=2.0.0b1 <2.24.0		1.107.2, 2.24.0

References

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