How severe is CVE-2026-46609?

CVE-2026-46609 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-46609 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-46609?

CVE-2026-46609 affects Umbraco Umbraco Cms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-46609?

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

Does CVE-2026-46609 have an EU (EUVD) identifier?

Yes. CVE-2026-46609 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36070.

When was CVE-2026-46609 published?

CVE-2026-46609 was published on 2026-06-10 and last updated on 2026-06-17.

CVE-2026-46609

CVE-2026-46609 is a medium-severity vulnerability in Umbraco Umbraco Cms with a CVSS 3.x base score of 4.6. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.6)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36070
Weakness: CWE-79
Affected product: Umbraco Umbraco Cms
Published: 2026-06-10
Last modified: 2026-06-17

Description

Umbraco is an ASP.NET CMS. From version 14.0.0 to before version 17.4.0, authenticated users are able to inject HTML into an input field, which is rendered in the confirmation dialog without proper output encoding. This issue has been patched in version 17.4.0.

Frequently asked questions

What is CVE-2026-46609?: Umbraco is an ASP.NET CMS. From version 14.0.0 to before version 17.4.0, authenticated users are able to inject HTML into an input field, which is rendered in the confirmation dialog without proper output encoding. This issue has been patched in version 17.4.0.
How severe is CVE-2026-46609?: CVE-2026-46609 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-46609 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-46609?: CVE-2026-46609 affects Umbraco Umbraco Cms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-46609?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-46609 have an EU (EUVD) identifier?: Yes. CVE-2026-46609 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36070.
When was CVE-2026-46609 published?: CVE-2026-46609 was published on 2026-06-10 and last updated on 2026-06-17.

References

https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-vr9v-27gg-qgx4

Affected products (1)

cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*

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