Radar · Go · Archive · Week 33 · Aug 10 – 16, 2026
1.25.13 Security and Bug Fixes
Worth knowingecosystem
- What changed
- Security fixes to the go command, crypto/tls, encoding/asn1, encoding/xml, html/template, net/http, and net/url packages, plus bug fixes to the compiler, runtime, crypto/tls, and os packages.
- Production impact
- The source does not say.
- Try it
- Build a small program that imports
net/httpand run it with Go 1.25.13 to ensure no crashes. - Source
- go.dev/doc/devel/release#go1.25.13
Understand it, then run it
The Go 1.25.13 release brings security fixes to several core packages. If you run go run or build a program that uses net/http, html/template, or crypto/tls, the updated code will be more resistant to known vulnerabilities. The compiler and runtime also received bug fixes that improve stability. No new language features or APIs were added in this release.
Run it now
// This program demonstrates that the standard library packages
// compile and run after the 1.25.13 security fixes. It does not
// perform network I/O because the sandbox has no network access.
package main
import (
"html/template"
"log"
"os"
)
func main() {
// Render a simple template to stdout.
tmpl, err := template.New("hello").Parse("Hello, {{.Name}}!")
if err != nil {
log.Fatalf("template parse error: %v", err)
}
if err := tmpl.Execute(os.Stdout, struct{ Name string }{Name: "world"}); err != nil {
log.Fatalf("template execute error: %v", err)
}
}
What it printed when we ran it on Go 1.27.1
Hello, world!
Run sends this program (for Solidity, the contract and its tests) to our own sandbox, where it is compiled and run once, with no network, and what it printed or the test report comes back here. Nothing is kept. Runs are counted per visitor for the day so everyone gets a turn; the details are on the legal page.
Written by gpt-oss-20b from the linked source · claims checked against the sources · archive, not individually reviewed