# net/http/internal/http2 (Go) vulnerabilities

1 known vulnerability (1 critical), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: not known (cve.now hasn't read this package's releases)
- Newest unaffected release: not known without release data
- Registry: https://pkg.go.dev/net/http/internal/http2

## Advisories (1)

### [CVE-2026-39821](https://cve.now/CVE-2026-39821): Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/net/idna

- Severity: Critical 9.6
- Published: May 22, 2026
- Affected: fixed in 1.25.13; from 1.26.0-0, fixed in 1.26.6; from 1.27.0-0, fixed in 1.27.0-rc.3.

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