CVE-2026-39819: Golang Go

Medium severity, CVSS 5.3. EPSS: 0.1% chance of exploitation in the next 30 days.

The "go bug" command writes to two files with predictable names in the system temporary directory (for example, "/tmp"). An attacker with access to the temporary directory can create a symlink in one of these names, causing "go bug" to overwrite the target of the symlink.

Affected products

• Golang Go: before 1.25.10 (fixed in 1.25.10); from 1.26.0, before 1.26.3 (fixed in 1.26.3)

Published 2026-05-07. Last modified 2026-06-17.