Vulnerability in Golang Go
CVE-2026-27143
Arithmetic over induction variables in loops were not correctly checked for underflow or overflow. As a result, the compiler would allow for invalid indexing to occur at runtime, potentially leading to memory corruption.
EPSS: 0.005 (41.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Golang Go
- Go Toolchain Cmd/compile — versions 0, 1.26.0-0
References
- security@golang.org (Patch)
- security@golang.org (Issue Tracking)
- security@golang.org (Mailing List, Release Notes)
- security@golang.org (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-27143?
- CVE-2026-27143 is a critical-severity vulnerability in Golang Go, classified under CWE-190: INTEGER OVERFLOW OR WRAPAROUND. CVSS score: 9.8/10. Published 2026-04-08.
- How severe is CVE-2026-27143?
- Critical severity. CVSS v3 base score is 9.8 out of 10.