CVE-2026-27143
A flaw in the Go compiler's handling of arithmetic on loop induction variables can allow underflow or overflow to go unchecked, enabling invalid array indexing at runtime and possible memory corruption. The vulnerability is rated critical with a CVSS base score of 9.8. It affects the golang go product, and there is currently no known exploitation or public exploit.
No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.
Who is affected
golang go
Real-world impact
Memory corruption could lead to crashes, data corruption, or arbitrary code execution.
Why this severity
CVSS 9.8 (Critical) reflects network‑attackable, low‑complexity impact with no privileges or user interaction required.
What to do about it
No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.
No fix documented in sources
Timeline
- Apr 8, 2026 · Apr 8, 2026PublishedDisclosed and added to the National Vulnerability Database.
- Jul 25, 2026 · 11d agoAdvisory updatedThe NVD record was last revised.
How it’s attacked
References & advisories
- go.dev/cl/763765patch
- go.dev/issue/78333issue tracking
- groups.google.com/g/golang-announce/c/0uYbvbP…mailing listrelease notes
- pkg.go.dev/vuln/GO-2026-4868vendor advisory