CVE-2026-48782Network attack vectorHinoki check available

Cloud credential disclosure via IPv6 transition bypass

Published Jun 16, 2026 · Updated Jun 16, 2026

SSRF in Pydantic AI and Pydantic AI Slim 1.56.0 through 1.101.0 and 2.0.0b1 through 2.0.0b2 allows remote attackers to read cloud IAM credentials. The URL validator fails to decode embedded metadata IPv4 addresses in IPv4-compatible, local or operator-chosen NAT64, and ISATAP IPv6 forms before applying its metadata blocklist. Exploitation requires an untrusted URL opted into force_download='allow-local' and a network that routes the relevant NAT64 or ISATAP form; standard dual-stack deployments are not affected in practice.

CVSS severity6.8
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

SSRF in Pydantic AI and Pydantic AI Slim 1.56.0 through 1.101.0 and 2.0.0b1 through 2.0.0b2 allows remote attackers to read cloud IAM credentials. The URL validator fails to decode embedded metadata IPv4 addresses in IPv4-compatible, local or operator-chosen NAT64, and ISATAP IPv6 forms before applying its metadata blocklist. Exploitation requires an untrusted URL opted into force_download='allow-local' and a network that routes the relevant NAT64 or ISATAP form; standard dual-stack deployments are not affected in practice.

The record

CVE
CVE-2026-48782
Published
Jun 16, 2026
Updated
Jun 16, 2026
Vendor
Pydantic
Product
Pydantic AI Slim
Classifications
CWE-918, T1552.005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 16, 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=>= 1.56.0, < 1.102.0
  2. Affected versionversion=>= 2.0.0b1, < 2.0.0b3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pydantic · Pydantic AI Slimversion=>= 1.56.0, < 1.102.0; version=>= 2.0.0b1, < 2.0.0b3
Pydantic · Pydantic AIversion=>= 1.56.0, < 1.102.0; version=>= 2.0.0b1, < 2.0.0b3

Published CVSS scores

6.8PydanticCVSS:3.1/AV:N/AC:H/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1552.005Unsecured Credentials: Cloud Instance Metadata API

Public exploit references

No public exploit references are available in this record.

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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