CVE-2025-47912
CVE-2025-47912 is a medium-severity vulnerability in Golang Go with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- EPSS exploit prediction: 0% (36th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-36735
- Affected product: Golang Go
- Published:
- Last modified:
Description
The Parse function permits values other than IPv6 addresses to be included in square brackets within the host component of a URL. RFC 3986 permits IPv6 addresses to be included within the host component, enclosed within square brackets. For example: "http://[::1]/". IPv4 addresses and hostnames must not appear within square brackets. Parse did not enforce this requirement.
Frequently asked questions
- What is CVE-2025-47912?
- The Parse function permits values other than IPv6 addresses to be included in square brackets within the host component of a URL. RFC 3986 permits IPv6 addresses to be included within the host component, enclosed within square brackets. For example: "http://[::1]/". IPv4 addresses and hostnames must not appear within square brackets. Parse did not enforce this requirement.
- How severe is CVE-2025-47912?
- CVE-2025-47912 has a CVSS 3.x base score of 5.3, 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 none, and availability none.
- Is CVE-2025-47912 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-47912?
- CVE-2025-47912 affects Golang Go. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2025-47912?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-47912 have an EU (EUVD) identifier?
- Yes. CVE-2025-47912 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-36735.
- When was CVE-2025-47912 published?
- CVE-2025-47912 was published on 2025-10-29 and last updated on 2026-06-17.
References
- https://go.dev/cl/709857
- https://go.dev/issue/75678
- https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bI
- https://pkg.go.dev/vuln/GO-2025-4010
- http://www.openwall.com/lists/oss-security/2025/10/08/1
Affected products (1)
- cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
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