How severe is CVE-2026-25580?

CVE-2026-25580 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-25580 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25580?

CVE-2026-25580 affects Pydantic Pydantic Ai. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25580?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-25580 have an EU (EUVD) identifier?

Yes. CVE-2026-25580 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5574.

When was CVE-2026-25580 published?

CVE-2026-25580 was published on 2026-02-06 and last updated on 2026-06-30.

CVE-2026-25580

CVE-2026-25580 is a high-severity vulnerability in Pydantic Pydantic Ai with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5574
Weakness: CWE-918
Affected product: Pydantic Pydantic Ai
Published: 2026-02-06
Last modified: 2026-06-30

Description

Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 0.0.26 to before 1.56.0, aServer-Side Request Forgery (SSRF) vulnerability exists in Pydantic AI's URL download functionality. When applications accept message history from untrusted sources, attackers can include malicious URLs that cause the server to make HTTP requests to internal network resources, potentially accessing internal services or cloud credentials. This vulnerability only affects applications that accept message history from external users. This vulnerability is fixed in 1.56.0.

Frequently asked questions

What is CVE-2026-25580?: Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 0.0.26 to before 1.56.0, aServer-Side Request Forgery (SSRF) vulnerability exists in Pydantic AI's URL download functionality. When applications accept message history from untrusted sources, attackers can include malicious URLs that cause the server to make HTTP requests to internal network resources, potentially accessing internal services or cloud credentials. This vulnerability only affects applications that accept message history from external users. This vulnerability is fixed in 1.56.0.
How severe is CVE-2026-25580?: CVE-2026-25580 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-25580 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25580?: CVE-2026-25580 affects Pydantic Pydantic Ai. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25580?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-25580 have an EU (EUVD) identifier?: Yes. CVE-2026-25580 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5574.
When was CVE-2026-25580 published?: CVE-2026-25580 was published on 2026-02-06 and last updated on 2026-06-30.

References

Affected products (1)

cpe:2.3:a:pydantic:pydantic_ai:*:*:*:*:*:python:*:*

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