What is CVE-2020-28366?

CVE-2020-28366 is a high-severity vulnerability in Golang Go, classified under Code Injection. CVSS score: 7.5/10. Published 2020-11-18.

How severe is CVE-2020-28366?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2020-28366 known to be exploited?

6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Golang Go

CVE-2020-28366

Code injection in the go command with cgo before Go 1.14.12 and Go 1.15.5 allows arbitrary code execution at build time via a malicious unquoted symbol name in a linked object file.

Vulnerability class: RCE (Remote Code Execution)

Published 2020-11-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.023 (83.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Golang Go
Go Toolchain Cmd/cgo — versions 0, 1.15.0-0
Go Toolchain Cmd/go — versions 0, 1.15.0-0
NetApp Cloud Insights Telegraf Agent
NetApp Trident
Fedoraproject Fedora — versions 32, 33

Weakness classification (CWE)

CWE-94 — Code Injection

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2020-28366?: CVE-2020-28366 is a high-severity vulnerability in Golang Go, classified under Code Injection. CVSS score: 7.5/10. Published 2020-11-18.
How severe is CVE-2020-28366?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2020-28366 known to be exploited?: 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.