CVE-2026-25580Public exploitNetwork attack vector

Internal resource disclosure via unvalidated URL downloads

Published Feb 6, 2026 · Updated Feb 6, 2026

SSRF in Pydantic AI before 1.56.0 allows remote attackers to read internal resources through URLs in untrusted message history. The download_item() helper fetches URL content without validating that the resolved destination is public or revalidating redirect targets. Reachability requires an application to accept externally supplied message history; hardcoded or developer-controlled URLs do not expose the flaw, and successful requests disclose only server-reachable content.

CVSS severity8.6
High
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Pydantic AI before 1.56.0 allows remote attackers to read internal resources through URLs in untrusted message history. The download_item() helper fetches URL content without validating that the resolved destination is public or revalidating redirect targets. Reachability requires an application to accept externally supplied message history; hardcoded or developer-controlled URLs do not expose the flaw, and successful requests disclose only server-reachable content.

The record

CVE
CVE-2026-25580
Published
Feb 6, 2026
Updated
Feb 6, 2026
Vendor
Pydantic
Product
Pydantic AI
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.0.26, < 1.56.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pydantic · Pydantic AIversion=>= 0.0.26, < 1.56.0

Published CVSS scores

8.6redhat-SADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
8.6GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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