CVE-2026-75926 — gohugo / hugo
Insecure Default Initialization of ResourceHugo 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.
| Software | Affected versions |
|---|---|
| gohugo / hugo | >= 0.162.0, < 0.165.0 |
- https://github.com/gohugoio/hugo
- https://github.com/gohugoio/hugo/blob/v0.164.0/common/hexec/exec.go#L292-L295
- https://github.com/gohugoio/hugo/blob/v0.164.0/config/security/securityConfig.go#L72-L79
- https://github.com/gohugoio/hugo/commit/8a55df7af2e6da31297245cc54fa2e3b521d93e8
- https://github.com/gohugoio/hugo/issues/15178
- https://www.vulncheck.com/advisories/hugo-to-x-node-permission-model-bypass-via-default-tailwindcss-child-process-grant
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A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.
CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.
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