CVE-2026-107289: Pydantic AI is a Python agent framework for building applications and workflows with Generative AI

Q: How do I fix CVE-2026-107289?

pydantic ai: upgrade to 1.107.6, 2.44.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-107289 being exploited?

CVE-2026-107289 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-107289 affect?

CVE-2026-107289 affects pydantic ai. Severity is medium (CVSS 6.8). 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 force_do

Q: How urgent is CVE-2026-107289?

Priority 42/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 6.8REMOTEUPGRADE

CVE-2026-107289 is a medium-severity flaw (CVSS 6.8) affecting pydantic ai. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 force_download='allow-local' or web_fetch_tool with allow_local_urls=True can bypass the cloud-metadata blocklist by appending an IPv6 zone identifier to an IPv6 metadata address. IPv6Address equality and hashing inclu

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-918, CWE-1289
Published	2026-10-08
Last modified	2026-10-13

Publisher (CNA): GitHub, Inc. · Vendor: pydantic

Last updated 2026-10-13 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-08 16:17 UTCPublished CVE record published
2026-10-13 14:34 UTCUpdated Record last modified

pydantic pydantic ai UPGRADE

Affected: >= 1.56.0 and < 1.107.6 · >= 2.0.0 and < 2.44.0

Fixed in: 1.107.6, 2.44.0

Safe to downgrade to: a release before 1.56.0

1. Check installed version

pip show pydantic-ai

2. UPGRADE to 1.107.6

pip install --upgrade "pydantic-ai>=1.107.6"

3. If no update is available yet, DOWNGRADE to a release before 1.56.0

pip index versions pydantic-ai pip install "pydantic-ai<1.56.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-107289?

pydantic ai: upgrade to 1.107.6, 2.44.0. Exact commands for each OS are on this page.

Is CVE-2026-107289 being exploited?

CVE-2026-107289 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-107289 affect?

CVE-2026-107289 affects pydantic ai. Severity is medium (CVSS 6.8). 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 force_do

How urgent is CVE-2026-107289?

Priority 42/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

Related CVEs

CVE-2026-107292 MEDIUM 6.4 UPGRADE Pydantic AI is a Python agent framework for building applications and workflows with Generative AI
CVE-2026-107287 MEDIUM 6.5 UPGRADE Pydantic AI is a Python agent framework for building applications and workflows with Generative AI
CVE-2026-107286 HIGH 7.5 UPGRADE Pydantic AI is a Python agent framework for building applications and workflows with Generative AI
CVE-2026-107288 LOW 3.7 UPGRADE Pydantic AI is a Python agent framework for building applications and workflows with Generative AI
CVE-2026-107290 MEDIUM 6.5 UPGRADE Pydantic AI is a Python agent framework for building applications and workflows with Generative AI

References

← Back to latest CVEs