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" subcommand can write files to arbitrary locations on the filesystem.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.5 / Impact : 4.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://go.dev/cl/767520	Patch
https://go.dev/issue/78778	Issue Tracking
https://groups.google.com/g/golang-announce/c/qcCIEXso47M	Issue Tracking Mailing List
https://pkg.go.dev/vuln/GO-2026-4979	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:golang:go::::::::
	cpe:2.3:a:golang:go::::::::

History

13 May 2026, 14:59

Type	Values Removed	Values Added
First Time		Golang Golang go
CWE		CWE-787
CPE		cpe:2.3:a:golang:go::::::::
References	~~() https://go.dev/cl/767520 -~~	() https://go.dev/cl/767520 - Patch
References	~~() https://go.dev/issue/78778 -~~	() https://go.dev/issue/78778 - Issue Tracking
References	~~() https://groups.google.com/g/golang-announce/c/qcCIEXso47M -~~	() https://groups.google.com/g/golang-announce/c/qcCIEXso47M - Issue Tracking, Mailing List
References	~~() https://pkg.go.dev/vuln/GO-2026-4979 -~~	() https://pkg.go.dev/vuln/GO-2026-4979 - Vendor Advisory

08 May 2026, 22:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.9

07 May 2026, 20:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-07 20:16

Updated : 2026-05-13 14:59

NVD link : CVE-2026-39817

Mitre link : CVE-2026-39817

CVE.ORG link : CVE-2026-39817

JSON object : View

Products Affected

golang

go

CWE

CWE-787

Out-of-bounds Write

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