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Security Advisories

GO-2026-4978

https://pkg.go.dev/vuln/GO-2026-4978

Severity

5.3

Medium

CVSS V3

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Summary

Invoking "go bug" follows symlinks in predictable temporary filenames in cmd/go

Description

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.

  • https://nvd.nist.gov/vuln/detail/CVE-2026-39819
  • https://github.com/advisories/GHSA-5m4p-2gjx-p2g8
  • https://pkg.go.dev/vuln/GO-2026-4978
  • https://go.dev/issue/78584
  • https://go.dev/cl/763882
  • https://groups.google.com/g/golang-announce/c/qcCIEXso47M

Affected packages

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