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Security Advisories

GO-2026-4979

https://pkg.go.dev/vuln/GO-2026-4979

Severity

5.9

Medium

CVSS V3

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Summary

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.

  • https://nvd.nist.gov/vuln/detail/CVE-2026-39817
  • https://github.com/advisories/GHSA-qc64-m6c2-v4x7
  • https://pkg.go.dev/vuln/GO-2026-4979
  • https://go.dev/issue/78778
  • https://go.dev/cl/767520
  • https://groups.google.com/g/golang-announce/c/qcCIEXso47M

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