Out-of-bounds Write Affecting go-toolset package, versions <0:1.26.3-1.el9_8


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.17% (7th percentile)

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  • Snyk IDSNYK-ALMALINUX9-GOTOOLSET-21747154
  • published27 Oct 2026
  • disclosed1 Jun 2026

Introduced: 1 Jun 2026

CVE-2026-39817  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 go-toolset to version 0:1.26.3-1.el9_8 or higher.
This issue was patched in ALSA-2026:22121.

NVD Description

Note: Versions mentioned in the description apply only to the upstream go-toolset package and not the go-toolset package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1