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MEDIUM · 5.9

CVE-2026-39817

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" sub...

Vulnerability 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.

CVSS Score

5.9

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE

Affected Products

VendorProductVersions
GolangGo< 1.25.10

Related Weaknesses (CWE)

CWE-787

References

FAQ

What is CVE-2026-39817?

CVE-2026-39817 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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" sub...

How severe is CVE-2026-39817?

CVE-2026-39817 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-39817?

Check the references section above for vendor advisories and patch information. Affected products include: Golang Go.