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Noroxi
NVD / CVE Program· CNA Go

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

MediumCVSS 5.3 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.46% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Go standard library net/url 1.24.8, 1.25.2.

Low priority for now. Upgrade to Go standard library net/url 1.24.8, 1.25.2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Oct 29, 2025
Updated
Oct 8, 2026
EPSS
0.4% · 40th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-47912

When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
golanggo

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Go). Independent of NVD's CPE analysis and usually ahead of it.

  • Go standard library net/url

    • before 1.24.8affected · semver
    • 1.25.0 and later · before 1.25.2affected · semver

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • golang gobefore 1.24.8
  • golang go1.25.0 and later · before 1.25.2

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.22gofrom 1.25.0 · before 1.24.8-r01.24.8-r0
Alpine:v3.23gofrom 1.25.0 · before 1.25.2-r01.25.2-r0
Debian:12golang-1.19from 0—
Debian:13golang-1.24from 0—
Gostdlibfrom 1.25.0 · before 1.25.21.25.2
Gostdlibbefore 1.24.81.24.8
openSUSE:Leap 15.6go1.24before 1.24.9-150000.1.42.11.24.9-150000.1.42.1
openSUSE:Leap 15.6go1.24-opensslbefore 1.24.12-150600.13.15.11.24.12-150600.13.15.1
openSUSE:Leap 15.6go1.25before 1.25.2-150000.1.14.11.25.2-150000.1.14.1
openSUSE:Leap 15.6go1.25-opensslbefore 1.25.6-150600.13.9.11.25.6-150600.13.9.1
openSUSE:Leap 16.0go1.24before 1.24.11-160000.1.11.24.11-160000.1.1
openSUSE:Leap 16.0go1.24-opensslbefore 1.24.13-160000.1.11.24.13-160000.1.1
openSUSE:Leap 16.0go1.25before 1.25.5-160000.1.11.25.5-160000.1.1
openSUSE:Leap 16.0go1.25-opensslbefore 1.25.7-160000.1.11.25.7-160000.1.1
openSUSE:Tumbleweedgo1.24before 1.24.8-1.11.24.8-1.1
openSUSE:Tumbleweedgo1.25before 1.25.2-1.11.25.2-1.1
openSUSE:Tumbleweedgovulncheck-vulndbbefore 0.0.20251029T215107-1.10.0.20251029T215107-1.1
openSUSE:Tumbleweedkubecolorbefore 0.5.3-1.10.5.3-1.1
openSUSE:Tumbleweedregclientbefore 0.10.0-1.10.10.0-1.1
Red Hat:hummingbird:1golang1.25before 0:1.25.9-1.hum10:1.25.9-1.hum1
Red Hat:hummingbird:1golang1.25-binbefore 0:1.25.9-1.hum10:1.25.9-1.hum1
Red Hat:hummingbird:1golang1.25-docsbefore 0:1.25.9-1.hum10:1.25.9-1.hum1
Red Hat:hummingbird:1golang1.25-miscbefore 0:1.25.9-1.hum10:1.25.9-1.hum1
Red Hat:hummingbird:1golang1.25-sharedbefore 0:1.25.9-1.hum10:1.25.9-1.hum1

+19

Same product

golang: all records

Other highest-scoring records for the same primary product.

  • CVE-2018-7187The "go get" implementation in Go 1.9.4, when the -insecure command-line option is used, does not validate the import path (get/vcs.go only…
    54Plan
  • CVE-2018-16873In Go before 1.10.6 and 1.11.x before 1.11.3, the "go get" command is vulnerable to remote code execution when executed with the -u flag…
    52Plan
  • CVE-2021-38297Go before 1.16.9 and 1.17.x before 1.17.2 has a Buffer Overflow via large arguments in a function invocation from a WASM module, when…
    42Plan

Published before and after this one in the same product

  • ← EarlierCVE-2025-47907Aug 7, 2025 · Incorrect results returned from Rows.Scan in database/sql
    28Monitor
  • ← EarlierCVE-2025-47906Sep 18, 2025 · Unexpected paths returned from LookPath in os/exec
    26Monitor
  • Later →CVE-2025-58185Oct 29, 2025 · Parsing DER payload can cause memory exhaustion in encoding/asn1
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Go standard library net/url1.24.8Vendor (CNA)
Go standard library net/url1.25.2Vendor (CNA)
azl3 golang 1.27.0-1 on Azure Linux 3.0—Microsoft (MSRC)
alpine:go1.24.8-r0 · Alpine:v3.22Package registry (OSV)
debian:golang-1.251.25.2-1 · Debian:14Package registry (OSV)
Go:stdlib1.24.8Package registry (OSV)
Go:stdlib1.25.2Package registry (OSV)
opensuse:go1.241.24.9-150000.1.42.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:go1.24-openssl1.24.12-150600.13.15.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:go1.251.25.2-150000.1.14.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:go1.25-openssl1.25.6-150600.13.9.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:govulncheck-vulndb0.0.20251029T215107-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:kubecolor0.5.3-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:regclient0.10.0-1.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:golang1.250:1.25.9-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:golang1.25-bin0:1.25.9-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:golang1.25-docs0:1.25.9-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:golang1.25-misc0:1.25.9-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:golang1.25-shared0:1.25.9-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:golang1.260:1.26.2-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:golang1.26-bin0:1.26.2-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:golang1.26-docs0:1.26.2-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:golang1.26-misc0:1.26.2-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:golang1.26-shared0:1.26.2-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:golang1.26-src0:1.26.2-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:golang1.26-tests0:1.26.2-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
suse:go1.241.24.11-160000.1.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:go1.241.24.9-150000.1.42.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP6Package registry (OSV)
suse:go1.24-openssl1.24.12-150000.1.18.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSPackage registry (OSV)
suse:go1.24-openssl1.24.12-150600.13.15.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7Package registry (OSV)

+3

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Not on record for this CVE: EPSS history · patch commit or PR link · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-1286 · Improper Validation of Syntactic Correctness of Input

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records