CVE-2026-27144 Miscompilation allows memory corruption via CONVNOP-wrapped array copy in cmd/compile
A miscompilation in the Go compiler can cause memory corruption during array copies, potentially allowing attackers to execute arbitrary code or crash applications.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-27144?
CVE-2026-27144 is a high-severity memory corruption vulnerability in Golang Go, published on 8 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The compiler is meant to unwrap pointers which are the operands of a memory move; a no-op interface conversion prevented the compiler from making the correct determination about non-overlapping moves, potentially leading to memory corruption at runtime.
Weakness: CWE-843
Which versions are affected by CVE-2026-27144?
2 open source packages ship an affected version, including golang and toolchain. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
golang Bitnami | All versions | 1.25.9, 1.26.2 |
toolchain Go | All versions | 1.25.9, 1.26.2 |
Products include Golang Go.
How do I fix CVE-2026-27144?
Upgrade golang to a fixed version for your release line: 1.25.9 or 1.26.2.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-27144 being exploited?
There is no known exploitation of CVE-2026-27144 in the wild and no public exploit code.
Other vulnerabilities in Golang Go
- CVE-2020-0601 Microsoft Windows CryptoAPI Spoofing
- CVE-2026-27143 Missing bound checks can lead to memory corruption in safe Go in cmd/compile
- CVE-2024-24790 Unexpected behavior from Is methods for IPv4-mapped IPv6 addresses in net/netip
- CVE-2023-39320 Arbitrary code execution via go.mod toolchain directive in cmd/go
- CVE-2023-24540 Improper handling of JavaScript whitespace in html/template
Sources
Also known as AZL-98859, BELL-CVE-2026-27144, BIT-golang-2026-27144, CLEANSTART-2026-BL51043, CLEANSTART-2026-KZ49511, CLEANSTART-2026-OE45196 and 641 more.