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CVE-2026-27143

CRITICAL CVSS 3.1: 9.8 EPSS 0.02%
Updated Apr 16, 2026
Golang
Parameter Value
CVSS 9.8 (CRITICAL)
Affected Versions 1.26.0 — 1.26.2
Fixed In 1.25.9
Vendor Golang
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Vulnerable Products 2

Configuration From (including) Up to (excluding)
Golang Go
cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
1.25.9
Golang Go
cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
1.26.0 1.26.2