Vulnerability · CVE-2026-25679
Incorrect parsing of IPv6 host literals in net/url
Published Mar 6, 2026 · catalog updated Oct 16, 2026 · Red Hat
Check if you run it
No confirmed exploitation is on record for CVE-2026-25679. EPSS is 0.83%. Act only if a listed version of Red Hat is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- High7.5
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.83%
- Remediation
- Advisory link
- Affected products
- Go stdlib · cpe golang/go
The Go standard library function net/url.Parse insufficiently validated the host/authority component and accepted some invalid URLs by effectively treating garbage before an IP-literal as ignorable. The function should have rejected this as invalid.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- Go stdlib0 → 1.25.8
- cpe golang/go1.26.0
How to fix CVE-2026-25679
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-25679. EPSS is 0.83%. Act only if a listed version of Red Hat is installed.
Which versions are affected?
Compare what you have installed with 0 → 1.25.8, 1.26.0. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-1286; CWE-425: Direct Request (Forced Browsing). EPSS 0.83%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Mar 6, 2026 · OpenSSF OSV / OSV Scanner
Detected
url.Parse insufficiently validated the host/authority component and accepted some invalid URLs.
Oct 15, 2026 · OpenSSF OSV / OSV Scanner
Fix available
stdlib fixed in 1.25.8
Oct 15, 2026 · OpenSSF OSV / OSV Scanner
Fix available
stdlib fixed in 1.25.8
Oct 15, 2026 · OpenSSF OSV / OSV Scanner
Updated
url.Parse insufficiently validated the host/authority component and accepted some invalid URLs.
Oct 16, 2026 · OpenSSF OSV / OSV Scanner
Updated
url.Parse insufficiently validated the host/authority component and accepted some invalid URLs.
Sources
- CSAF AdvisoriesVendor advisoryRHSA-2026:9742:CVE-2026-25679
The Go standard library function net/url.Parse insufficiently validated the host/authority component and accepted some invalid URLs by effectively treating garbage before an IP-literal as ignorable. The function should have rejected this as invalid.
security.access.redhat.com - CSAF AdvisoriesVendor advisoryRHSA-2026:9872:CVE-2026-25679
The Go standard library function net/url.Parse insufficiently validated the host/authority component and accepted some invalid URLs by effectively treating garbage before an IP-literal as ignorable. The function should have rejected this as invalid.
security.access.redhat.com - CVE.orgVulnerability recordCVE-2026-25679
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-25679
30-day exploitation probability 0.8%
first.org - Go Vulnerability DatabasePackage advisoryGO-2026-4601
Incorrect parsing of IPv6 host literals in net/url
osv.dev - NIST NVDVulnerability recordCVE-2026-25679
url.Parse insufficiently validated the host/authority component and accepted some invalid URLs.
nvd.nist.gov - OpenSSF OSV / OSV ScannerPackage advisoryGO-2026-4601
Incorrect parsing of IPv6 host literals in net/url
osv.dev
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.