CVE-2026-75926 Hugo 0.162.0 to 0.164.x - Node Permission Model Bypass via Default TailwindCSS Child-Process Grant
Hugo's default TailwindCSS configuration bypasses Node permission restrictions, allowing arbitrary command execution during site builds.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-75926?
CVE-2026-75926 is a critical vulnerability in gohugoio hugo, published on 18 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Hugo 0.161.0 placed the Node asset pipelines behind the Node.js permission model so that code running through PostCSS, Babel, or TailwindCSS could not reach the file system outside the project directory. Hugo 0.162.0 added tailwindcss to the AllowChildProcess default in config/security/securityConfig.go, which makes nodePermissionArgs in common/hexec/exec.go append --allow-child-process whenever the tool being launched is named tailwindcss. TailwindCSS loads the site's tailwind.config.js through require at startup, so top-level code in that file executes inside the permitted Node process and can call child_process to spawn a shell. The spawned process is not a Node process and inherits none of the permission flags, so it runs with the full privileges of the account performing the build. Building a site whose theme, module, or starter template supplies the Tailwind configuration therefore yields arbitrary command execution rather than the confined file access the permission model was introduced to enforce. Hugo 0.165.0 removes tailwindcss from the default security.exec.allow list, so the tool is no longer launched under the default configuration.
Weakness: CWE-1188
Which versions are affected by CVE-2026-75926?
It affects 1 product.
Products include Gohugo Hugo.
How do I fix CVE-2026-75926?
Upgrade to a fixed version.
Is CVE-2026-75926 being exploited?
There is no known exploitation of CVE-2026-75926 in the wild and no public exploit code.
Other vulnerabilities in gohugoio hugo
- CVE-2026-100690 Hugo v0.161.0 to v0.165.0 Arbitrary File Read via Symlinks
- CVE-2026-100692 Hugo before v0.166.0 Path Traversal via Symlinked Mount Roots
- CVE-2026-100693 Hugo v0.162.0 before v0.166.0 IP-literal Deny Rule Bypass
- CVE-2020-26284 Hugo can execute a binary from the current directory on Windows
- CVE-2026-50135 Hugo: Symlink confinement bypass in resources.Get
Sources
Also known as DEBIAN-CVE-2026-75926, GHSA-pxpg-7gfv-6wc9, MINI-h7q5-v7x4-5x79, MINI-qv24-jfm8-qjqq, UBUNTU-CVE-2026-75926.