CVE-2026-39817
The "go tool pack" subcommand (usually used only by the compiler as an internal tool with known-good inputs) does not sanitize output filenames. Extracting a malicious archive file with the "pack" subcommand can write files to arbitrary locations on the filesystem.
- Published May 7, 2026
- CVSS 5.9 medium
- 0.2% chance of exploitation in the next 30 days (EPSS)
- A fix is available