How severe is CVE-2026-28415?

CVE-2026-28415 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-28415 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28415?

CVE-2026-28415 affects Gradio Project Gradio. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28415?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-28415 have an EU (EUVD) identifier?

Yes. CVE-2026-28415 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9083.

When was CVE-2026-28415 published?

CVE-2026-28415 was published on 2026-02-27 and last updated on 2026-06-17.

CVE-2026-28415

CVE-2026-28415 is a medium-severity vulnerability in Gradio Project Gradio with a CVSS 3.x base score of 4.3. 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-601.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9083
Weakness: CWE-601
Affected product: Gradio Project Gradio
Published: 2026-02-27
Last modified: 2026-06-17

Description

Gradio is an open-source Python package designed for quick prototyping. Prior to version 6.6.0, the _redirect_to_target() function in Gradio's OAuth flow accepts an unvalidated _target_url query parameter, allowing redirection to arbitrary external URLs. This affects the /logout and /login/callback endpoints on Gradio apps with OAuth enabled (i.e. apps running on Hugging Face Spaces with gr.LoginButton). Starting in version 6.6.0, the _target_url parameter is sanitized to only use the path, query, and fragment, stripping any scheme or host.

Frequently asked questions

What is CVE-2026-28415?: Gradio is an open-source Python package designed for quick prototyping. Prior to version 6.6.0, the _redirect_to_target() function in Gradio's OAuth flow accepts an unvalidated _target_url query parameter, allowing redirection to arbitrary external URLs. This affects the /logout and /login/callback endpoints on Gradio apps with OAuth enabled (i.e. apps running on Hugging Face Spaces with gr.LoginButton). Starting in version 6.6.0, the _target_url parameter is sanitized to only use the path, query, and fragment, stripping any scheme or host.
How severe is CVE-2026-28415?: CVE-2026-28415 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-28415 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28415?: CVE-2026-28415 affects Gradio Project Gradio. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28415?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-28415 have an EU (EUVD) identifier?: Yes. CVE-2026-28415 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9083.
When was CVE-2026-28415 published?: CVE-2026-28415 was published on 2026-02-27 and last updated on 2026-06-17.

References

https://github.com/gradio-app/gradio/security/advisories/GHSA-pfjf-5gxr-995x

Affected products (1)

cpe:2.3:a:gradio_project:gradio:*:*:*:*:*:python:*:*

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