CVE-2026-48782: Pydantic AI is a Python agent framework for building applications and workflows with Generative AI

Q: How do I fix CVE-2026-48782?

pydantic ai: upgrade to 1.102.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-48782 being exploited?

CVE-2026-48782 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-2026-48782 affect?

CVE-2026-48782 affects pydantic ai. Severity is medium (CVSS 6.8). Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. In versions 1.56.0 through 1.101.0, 2.0.0b1, and 2.0.0b2, the cloud-metadata blocklist could be bypassed by encoding the metadata IP in an I

Q: How urgent is CVE-2026-48782?

Priority 37/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 6.8REMOTEUPGRADE

CVE-2026-48782 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. In versions 1.56.0 through 1.101.0, 2.0.0b1, and 2.0.0b2, the cloud-metadata blocklist could be bypassed by encoding the metadata IP in an IPv6 transition form that the previous fix, CVE-2026-46678, did not decode, exposing cloud IAM short-term credentials. The previous remediation decoded only IPv4-mapped IPv6, 6to4, and the NAT64 well-known prefi

Why this priority

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 66%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-06-17
Last modified	2026-08-06

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

Last updated 2026-08-06 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-17 13:20 UTCPublished CVE record published
2026-08-06 18:30 UTCUpdated Record last modified

pydantic pydantic ai UPGRADE

Affected: >= 1.56.0 and < 1.102.0 · 2.0.0 beta1 · 2.0.0 beta2

Fixed in: 1.102.0

Safe to downgrade to: a release before 1.56.0

1. Check installed version

pip show pydantic-ai

2. UPGRADE to 1.102.0

pip install --upgrade "pydantic-ai>=1.102.0"

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-2026-48782?

pydantic ai: upgrade to 1.102.0. Exact commands for each OS are on this page.

Is CVE-2026-48782 being exploited?

CVE-2026-48782 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-2026-48782 affect?

CVE-2026-48782 affects pydantic ai. Severity is medium (CVSS 6.8). Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. In versions 1.56.0 through 1.101.0, 2.0.0b1, and 2.0.0b2, the cloud-metadata blocklist could be bypassed by encoding the metadata IP in an I

How urgent is CVE-2026-48782?

Priority 37/100. Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

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References

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