CVE-2026-97035

Published Nov 11, 2026

Description

When using Clang or GCC, building a malicious package that uses cgo could cause unexpected code execution at build time or write files to arbitrary directories via "-gen-*" or "-gnat*" flags in "#cgo" directives. The "-g*" wildcard in the compiler and linker flag allowlists previously matched Clang's two-argument "-gen-cdb-fragment-path <dir>" flag and GCC's two-argument "-gnatO <file>" flag, permitting compilation database fragments and sidecar output files to be written to arbitrary directories and desynchronizing flag argument parsing between the go command and the compiler driver so that subsequent arguments could be passed as unvalidated positional inputs to the linker. "-gen-*" and "-gnat*" flags are now disallowed in "#cgo" compiler and linker flags.

Is your site exposed to CVE-2026-97035?

Run a free security scan — no signup, results in seconds.

References

Frequently Asked Questions

What is CVE-2026-97035? +
When using Clang or GCC, building a malicious package that uses cgo could cause unexpected code execution at build time or write files to arbitrary directories via "-gen-*" or "-gnat*" flags in "#cgo" directives. The "-g*" wildcard in the compiler and linker flag allowlists previously matched Clang's two-argument "-gen-cdb-fragment-path <dir>" flag and GCC's two-argument "-gnatO <file>" flag, permitting compilation database fragments and sidecar output files to be written to arbitrary directories and desynchronizing flag argument parsing between the go command and the compiler driver so that subsequent arguments could be passed as unvalidated positional inputs to the linker. "-gen-*" and "-gnat*" flags are now disallowed in "#cgo" compiler and linker flags.
How do I check if I'm vulnerable to CVE-2026-97035? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Don't wait for an exploit

Scan your website for vulnerabilities like CVE-2026-97035 — free, no signup required.

Patch and protect

Block known exploits with a web application firewall while you patch, or test the fix on a fresh server.

Compare VPS prices →
Sucuri Sucuri → Website firewall, malware cleanup & monitoring NordPass NordPass → Password manager with breach alerts Contabo Contabo → Cheap VPS & dedicated servers, EU/US/Asia Vultr Vultr → Cloud VPS in 30+ locations, hourly billing
NordVPN NordVPN → Hide your IP, servers in 120+ countries Surfshark Surfshark → Unlimited devices, from ~$2/mo

Affiliate links: we may earn a commission, your price stays the same.