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CVE-2026-27143— Missing bound checks can lead to memory corruption in safe Go in cmd/compile

Quick assessment

Affected
Go toolchain cmd/compile
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Google Go是美国谷歌（Google）公司的一种静态强类型、编译型、并发型，并具有垃圾回收功能的编程语言。 Google Go存在安全漏洞，该漏洞源于未正确检查循环归纳变量的算术下溢或溢出，可能导致运行时内存损坏。

AI Predicted 5.5 Difficulty: Hard EPSS 0.66% · P50
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I. Basic Information for CVE-2026-27143

Vulnerability Information
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Vulnerability Title
Missing bound checks can lead to memory corruption in safe Go in cmd/compile
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Google Go 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google Go是美国谷歌（Google）公司的一种静态强类型、编译型、并发型，并具有垃圾回收功能的编程语言。 Google Go存在安全漏洞，该漏洞源于未正确检查循环归纳变量的算术下溢或溢出，可能导致运行时内存损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Go toolchain cmd/compile 0 ~ 1.25.9 -

II. Public POCs for CVE-2026-27143

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III. Intelligence Information for CVE-2026-27143

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Vendor Advisories for CVE-2026-27143 (1)

Same Patch Batch · Go toolchain · 2026-04-08 · 3 CVEs total

CVE-2026-27144 Miscompilation allows memory corruption via CONVNOP-wrapped array copy in cmd/compile
CVE-2026-27140 Code execution vulnerability in SWIG code generation in cmd/go

IV. Related Vulnerabilities

Same product: cmd/compile
Same vendor: Go toolchain

V. Comments for CVE-2026-27143

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