How severe is CVE-2025-61729?

CVE-2025-61729 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-61729 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-61729?

CVE-2025-61729 affects Golang Go. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-61729?

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-2025-61729 have an EU (EUVD) identifier?

Yes. CVE-2025-61729 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200318.

When was CVE-2025-61729 published?

CVE-2025-61729 was published on 2025-12-02 and last updated on 2026-06-17.

CVE-2025-61729

CVE-2025-61729 is a high-severity vulnerability in Golang Go with a CVSS 3.x base score of 7.5. 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: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-200318
Weakness: CWE-295
Affected product: Golang Go
Published: 2025-12-02
Last modified: 2026-06-17

Description

Within HostnameError.Error(), when constructing an error string, there is no limit to the number of hosts that will be printed out. Furthermore, the error string is constructed by repeated string concatenation, leading to quadratic runtime. Therefore, a certificate provided by a malicious actor can result in excessive resource consumption.

Frequently asked questions

What is CVE-2025-61729?: Within HostnameError.Error(), when constructing an error string, there is no limit to the number of hosts that will be printed out. Furthermore, the error string is constructed by repeated string concatenation, leading to quadratic runtime. Therefore, a certificate provided by a malicious actor can result in excessive resource consumption.
How severe is CVE-2025-61729?: CVE-2025-61729 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-61729 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-61729?: CVE-2025-61729 affects Golang Go. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-61729?: 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-2025-61729 have an EU (EUVD) identifier?: Yes. CVE-2025-61729 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200318.
When was CVE-2025-61729 published?: CVE-2025-61729 was published on 2025-12-02 and last updated on 2026-06-17.

References

Affected products (1)

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

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