CVE-2026-39836 Details
Description
The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL (0).
A vulnerability exists in the Go programming language's standard library, specifically within the 'net' package. The issue arises in the 'Dial' and 'LookupPort' functions, which panic on Windows when they encounter an input containing a NUL byte. This behavior can lead to unexpected crashes in applications that rely on these functions.
Users can upgrade to Go versions 1.26.3 or 1.25.10, both of which address this vulnerability. Instructions for downloading these versions are available on the Go website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 8, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://go.dev/cl/775320 | [email protected] | Patch |
| https://go.dev/issue/79006 | [email protected] | Issue Tracking |
| https://groups.google.com/g/golang-announce/c/qcCIEXso47M | [email protected] | Issue TrackingMailing List |
| https://pkg.go.dev/vuln/GO-2026-4971 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| golang go | < 1.25.10 >= 1.26.0, < 1.26.3 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 13, 2026 | Initial Analysis | [email protected] |
| May 8, 2026 | CVE Modified | CISA-ADP |
| May 7, 2026 | New CVE Received | [email protected] |