CVE-2025-47912: Insufficient validation of bracketed IPv6 hostnames in net/url

Analyzed

AliasesUBUNTU-CVE-2025-47912DEBIAN-CVE-2025-47912CGA-223w-3wcm-xrhh+3973 more

Published 29-10-2025Last modified 04-11-2025

Vulnerability summary

CVE-2025-47912 is a medium (CVSS 5.3) vulnerability in go standard library net/url. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 40.5% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

5.3/10

010

Medium · v3.1 (CVE.org)

EPSS score

0.47%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 23 · Related 96

MGASA-2025-0256 OPENSUSE-SU-2025:15608-1 OPENSUSE-SU-2025:15609-1 OPENSUSE-SU-2025:15695-1 OPENSUSE-SU-2025:15703-1 OPENSUSE-SU-2025:15723-1+91 more

Timeline

29-10-2025
PublishedVulnerability first disclosed.
04-11-2025
Last modifiedVulnerability information updated.

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.

CVSS metrics

7 scores · 7 sources · 1 version

v3.15.3

EPSS trend

Probability

0.47%

Chance of exploitation in the next 30 days

Percentile

41%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.47% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard199 products

age< 1.2.1-r8
age-fips< 1.2.1-r8
amass< 5.0.1-r1
amazon-k8s-cni-fips< 1.20.4-r2
amazon-k8s-cni-init-fips< 1.20.4-r2

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apm-server-8.18-compat< 8.18.8-r1
apm-server-fips-7.17< 7.17.29-r4
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authservice-fips< 1.1.1-r1
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blobfuse2-fips< 2.4.2-r6
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calico-kube-controllers-3.29< 3.29.6-r1
calico-node-3.29< 3.29.6-r1
calico-pod2daemon-3.29< 3.29.6-r1
calico-pod2daemon-flexvol-compat-3.29< 3.29.6-r1
calico-typha-client-3.29< 3.29.6-r1
calico-typhad-3.29< 3.29.6-r1
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capslock< 0.2.8-r1
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chartmuseum< 0.16.3-r8
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cilium-fips-1.15-container-init< 1.15.19-r7
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cis-operator-1.2< 1.2.7-r5
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cloud-provider-aws-fips-1.29< 1.29.8-r11
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cloud-provider-azure-cloud-controller-manager-1.29< 1.29.15-r5
cloud-provider-azure-cloud-controller-manager-1.29-compat< 1.29.15-r5
cloud-provider-azure-cloud-controller-manager-1.30< 1.30.15-r1
cloud-provider-azure-cloud-controller-manager-1.30-compat< 1.30.15-r1
cloud-provider-azure-cloud-controller-manager-1.31< 1.31.9-r1
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cloud-provider-azure-cloud-controller-manager-1.33< 1.33.3-r1
cloud-provider-azure-cloud-controller-manager-1.33-compat< 1.33.3-r1
cloud-provider-azure-cloud-controller-manager-fips-1.27< 1.27.21-r14

Show all 199

Alpine1 product

go≥ 1.25.0, < 1.24.8-r0 | ≥ 1.25.0, < 1.25.2-r0

2 vendors · 200 products · Showing 200 of 2336

References

16 links

go.dev/issue/75678WEBREPORTIssue Tracking
go.dev/cl/709857WEBFIXPatch
groups.google.com/g/golang-announce/c/4Emdl2iQ_bIWEBMailing ListRelease Notes
pkg.go.dev/vuln/GO-2025-4010WEBVendor Advisory
www.openwall.com/lists/oss-security/2025/10/08/1WEBMailing ListRelease Notes
ubuntu.com/security/CVE-2025-47912REPORT
www.cve.org/CVERecord?id=CVE-2025-47912REPORT
groups.google.com/g/golang-announce/c/4Emdl2iQ_bI/m/qZN5nc-mBgAJREPORT
github.com/golang/go/issues/75678REPORT
github.com/golang/go/commit/9fd3ac8a10272afd90312fef5d379de7d688a58eREPORT

Show all 16 references