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CVE PROGRAM SOURCE RECORD5.9 Medium

CVE-2026-39817

Invoking "go tool pack" does not sanitize output paths in cmd/go

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Go toolchain cmd/go

Default version status: unaffected

  • 0 to < 1.25.10affected
  • 1.26.0-0 to < 1.26.3affected

References