CVE-2026-39819

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

Medium · published May 7, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
3.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00148 · 3.7th percentile
Published
2026-05-07T19:41Z
EPSS history
Timeline
  • 07 MAY 19:41Z
    Invoking "go bug" follows symlinks in predictable temporary filenames in cmd/go
    cvelistv5