CVE-2025-22870

PoC – CVE-2025-22870 – HTTP Proxy Bypass via IPv6 Zone ID in Go Summary This Proof of Concept demonstrates the exploitation of CVE-2025-22870, a vulnerability in the golang.org/x/net/http/httpproxy package prior to v0.36.0, which can be used to bypass HTTP proxy restrictions by abusing the way IP...

Pydantic AI: SSRF cloud-metadata blocklist bypass via IPv6 zone identifiers

SummaryWhen an application using Pydantic AI opts a URL into local network access — either a FileUrl with forcedownload='allow-local', or webfetchtoolallowlocalurls=True — the cloud-metadata blocklist could be bypassed by appending an IPv6 zone identifier to a metadata address for example...

Pydantic AI: SSRF cloud-metadata blocklist bypass via IPv6 zone identifiers

SummaryWhen an application using Pydantic AI opts a URL into local network access — either a FileUrl with forcedownload='allow-local', or webfetchtoolallowlocalurls=True — the cloud-metadata blocklist could be bypassed by appending an IPv6 zone identifier to a metadata address for example...

PYSEC-2026-4282 Pydantic AI: SSRF cloud-metadata blocklist bypass via IPv6 zone identifiers

Summary When an application using Pydantic AI opts a URL into local network access — either a FileUrl with forcedownload='allow-local', or webfetchtoolallowlocalurls=True — the cloud-metadata blocklist could be bypassed by appending an IPv6 zone identifier to a metadata address for example...

PYSEC-2026-4291 Pydantic AI: SSRF cloud-metadata blocklist bypass via IPv6 zone identifiers

Summary When an application using Pydantic AI opts a URL into local network access — either a FileUrl with forcedownload='allow-local', or webfetchtoolallowlocalurls=True — the cloud-metadata blocklist could be bypassed by appending an IPv6 zone identifier to a metadata address for example...

CVE-2026-107289

A flaw was found in pydantic-ai. This vulnerability can lead to information disclosure, potentially exposing sensitive cloud credentials such as Identity and Access Management IAM tokens. In configurations where local network access is permitted for untrusted requests, a remote attacker can bypas...

Pydantic AI: SSRF cloud-metadata blocklist bypass via IPv6 zone identifiers

Summary When an application using Pydantic AI opts a URL into local network access — either a FileUrl with forcedownload='allow-local', or webfetchtoolallowlocalurls=True — the cloud-metadata blocklist could be bypassed by appending an IPv6 zone identifier to a metadata address for example...

Improper Validation of Unsafe Equivalence in Input

Overview pydantic-ai-slim is an Agent Framework / shim to use Pydantic with LLMs, slim package Affected versions of this package are vulnerable to Improper Validation of Unsafe Equivalence in Input via IPv6 zone identifier handling in the ssrf.py SSRF guard functions iscloudmetadataip and...

Improper Validation of Unsafe Equivalence in Input

Overview pydantic-ai is an AI Agent Framework, the Pydantic way Affected versions of this package are vulnerable to Improper Validation of Unsafe Equivalence in Input via IPv6 zone identifier handling in the ssrf.py SSRF guard functions iscloudmetadataip and isprivateip. An attacker can supply an...

CVE-2026-107289

The Pydantic AI Python agent framework is vulnerable to Server-Side Request Forgery (SSRF) in versions 1.56.0 through 1.107.5 and 2.44.0. When users opt-in to local network access via FileUrl (with force_download='allow-local') or web_fetch_tool (with allow_local_urls=True), an attacker can bypas...

CVE-2026-107289 Pydantic AI: SSRF cloud-metadata blocklist bypass via IPv6 zone identifier (incomplete fix for CVE-2026-46678 and CVE-2026-48782)

Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 1.56.0 until 1.107.6 and 2.44.0, applications that opt attacker-influenced URLs into local network access through FileUrl with forcedownload='allow-local' or webfetchtool with...

CVE-2026-107289 Pydantic AI: SSRF cloud-metadata blocklist bypass via IPv6 zone identifier (incomplete fix for CVE-2026-46678 and CVE-2026-48782)

Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 1.56.0 until 1.107.6 and 2.44.0, applications that opt attacker-influenced URLs into local network access through FileUrl with forcedownload='allow-local' or webfetchtool with...

CVE-2026-107289 Pydantic AI: SSRF cloud-metadata blocklist bypass via IPv6 zone identifier (incomplete fix for CVE-2026-46678 and CVE-2026-48782)

Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 1.56.0 until 1.107.6 and 2.44.0, applications that opt attacker-influenced URLs into local network access through FileUrl with forcedownload='allow-local' or webfetchtool with...

PT-2026-108034

Name of the Vulnerable Software and Affected Versions Pydantic AI versions 1.56.0 through 1.107.5 Pydantic AI versions prior to 2.44.0 Description Applications that enable local network access for attacker-influenced URLs via FileUrl with force download='allow-local' or web fetch tool with allow...

CVE-2025-22870

Matching of hosts against proxy patterns can improperly treat an IPv6 zone ID as a hostname component. For example, when the NOPROXY environment variable is set to ".example.com", a request to "::1%25.example.com:80 will incorrectly match and not be proxied...