How severe is CVE-2025-61727?

CVE-2025-61727 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-61727 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-61727?

CVE-2025-61727 affects Golang Go. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-61727?

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

Does CVE-2025-61727 have an EU (EUVD) identifier?

Yes. CVE-2025-61727 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201106.

When was CVE-2025-61727 published?

CVE-2025-61727 was published on 2025-12-03 and last updated on 2026-06-17.

CVE-2025-61727

CVE-2025-61727 is a medium-severity vulnerability in Golang Go with a CVSS 3.x base score of 6.5. 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-295.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-201106
Weakness: CWE-295
Affected product: Golang Go
Published: 2025-12-03
Last modified: 2026-06-17

Description

An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. For example a constraint that excludes the subdomain test.example.com does not prevent a leaf certificate from claiming the SAN *.example.com.

Frequently asked questions

What is CVE-2025-61727?: An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. For example a constraint that excludes the subdomain test.example.com does not prevent a leaf certificate from claiming the SAN *.example.com.
How severe is CVE-2025-61727?: CVE-2025-61727 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-61727 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-61727?: CVE-2025-61727 affects Golang Go. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-61727?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-61727 have an EU (EUVD) identifier?: Yes. CVE-2025-61727 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201106.
When was CVE-2025-61727 published?: CVE-2025-61727 was published on 2025-12-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*

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