← Vulnerability feed

Vulnerability record · CVE-2026-39836 · published 7 May 2026

CVE-2026-39836: Golang go null pointer dereference vulnerability

Golang · Go

The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL (0).

7.5 CVSS 3.1 High EPSS 0.62% · top 52.4% CWE-476 · NULL pointer dereference
7.5CVSS 3.1 base score
0.62%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL (0).

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://go.dev/cl/775320 Patch
https://go.dev/issue/79006 Issue Tracking
https://groups.google.com/g/golang-announce/c/qcCIEXso47M Issue TrackingMailing List
https://pkg.go.dev/vuln/GO-2026-4971 Vendor Advisory

Track CVE-2026-39836 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.1CVE-2020-0601Windows CryptoAPI ECC certificate validation spoofing flawWindows CryptoAPI (Crypt32.dll) improperly validates Elliptic Curve Cryptography certificates, allowing a spoofed code-signing certificate to be trus…KEVEPSS 89%analysed7.5CVE-2023-44487HTTP/2 Rapid Reset stream cancellation denial of serviceThe HTTP/2 protocol permits a client to cancel many streams quickly, and the server's handling of those resets consumes disproportionate resources. T…KEVEPSS 100%analysed10.0CVE-2025-68121Golang go improper certificate validation vulnerabilityDuring session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the r…EPSS 0.86%9.8CVE-2026-27143Golang go vulnerabilityArithmetic over induction variables in loops were not correctly checked for underflow or overflow. As a result, the compiler would allow for invalid …EPSS 0.66%9.8CVE-2024-24790Golang go vulnerabilityThe various Is methods (IsPrivate, IsLoopback, etc) did not work as expected for IPv4-mapped IPv6 addresses, returning false for addresses which woul…EPSS 2.0%9.8CVE-2023-39320Golang go code injection vulnerabilityThe go.mod toolchain directive, introduced in Go 1.21, can be leveraged to execute scripts and binaries relative to the root of the module when the "…EPSS 1.8%9.8CVE-2023-29404Golang go code injection vulnerabilityThe go command may execute arbitrary code at build time when using cgo. This may occur when running "go get" on a malicious module, or when running a…EPSS 1.8%9.8CVE-2023-29405Golang go injection vulnerabilityThe go command may execute arbitrary code at build time when using cgo. This may occur when running "go get" on a malicious module, or when running a…EPSS 1.7%

Source: NIST National Vulnerability Database (record CVE-2026-39836), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.