Pydantic AI: Unbounded memory use when downloading remote content via web_fetch or FileUrl (pydantic pydantic-ai)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.44 % · percentile 38 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD 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.
Weaknesses (CWE)
- CWE-400 — Uncontrolled Resource Consumption
References
- https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-v2xh-2vp8-57h8
- https://github.com/pydantic/pydantic-ai/pull/7141
- https://github.com/pydantic/pydantic-ai/pull/7308
- https://github.com/pydantic/pydantic-ai/commit/7a64d049c3f5271a975cd1d64b2fa876d83ede1d
- https://github.com/pydantic/pydantic-ai/commit/e3824a58c82864ed26afb2887619834a4eb86cc8
- https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.2
- https://github.com/pydantic/pydantic-ai/releases/tag/v2.24.0
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
| CVSS 3.1 | MEDIUM 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · security-advisories@github.com (Secondary) |
Advisories
- GHSA-v2xh-2vp8-57h8 — Pydantic AI: Unbounded memory use when downloading remote content via web_fetch or FileUrl
- PYSEC-2026-4280 — Pydantic AI: Unbounded memory use when downloading remote content via web_fetch or FileUrl
- PYSEC-2026-4289 — Pydantic AI: Unbounded memory use when downloading remote content via web_fetch or FileUrl
European references
- ENISA EUVD · EUVD-2026-95104
- GCVE · GCVE-0-2026-107294
Affected configurations (NVD CPE)
cpe:2.3:a:pydantic:pydantic_ai:*:*:*:*:*:python:*:*≥ 1.77.0 < 1.107.2cpe:2.3:a:pydantic:pydantic_ai:*:-:*:*:*:python:*:*≥ 2.0.0 < 2.24.0
Affected products
| Product | Versions |
|---|---|
| pydantic · pydantic-ai | affected >= 1.77.0, < 1.107.2 ; affected >= 2.0.0b1, < 2.24.0 |
| pydantic · pydantic-ai-slim | affected >= 1.77.0, < 1.107.2 ; affected >= 2.0.0b1, < 2.24.0 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |