VULNRABLE / Vulnerability / CVE-2026-39821

CVE-2026-39821

UNKNOWN LOW golang.org/x/net OSV

Exploit verdict: No active-exploit signal

CVSS Score

—

Severity

UNKNOWN

EPSS

Source

OSV

Summary

Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/net/idna

What this means

CVE-2026-39821 is a unknown-severity vulnerability affecting golang.org/x/net. The EPSS model estimates a 0% probability of exploitation in the next 30 days. Published May 22, 2026.

View full advisory at OSV →