Answer in brief
CVE-2026-107294 records a Medium severity (CVSS 6.5) vulnerability in Pydantic AI: Unbounded memory use when downloading remote content via web_fetch or FileUrl. The current sources do not mark it as known exploited. The current feed maps pydantic/pydantic-ai (generic), pydantic/pydantic-ai-slim (generic), pydantic-ai (pip), pydantic-ai (pip) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps pydantic/pydantic-ai (generic), pydantic/pydantic-ai-slim (generic), pydantic-ai (pip), pydantic-ai (pip) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| pydantic/pydantic-aigeneric | >=1.77.0 <1.107.2 || >=2.0.0b1 <2.24.0 | 1.107.2, 2.24.0 |
| pydantic/pydantic-ai-slimgeneric | >=1.77.0 <1.107.2 || >=2.0.0b1 <2.24.0 | 1.107.2, 2.24.0 |
| pydantic-aipip | >=1.77.0,<1.107.2 | 1.107.2 |
| pydantic-aipip | >=2.0.0b1,<=2.23.0 | 2.24.0 |
| pydantic-ai-slimpip | >=1.77.0,<1.107.2 | 1.107.2 |
| pydantic-ai-slimpip | >=2.0.0b1,<=2.23.0 | 2.24.0 |
Published upstream
Oct 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 8, 2026
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.
Quoted source text, attributed separately from HOL analysis.