Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-75926

CVE-2026-75926CRITICAL

gohugoio hugo — Hugo 0.162.0 to 0.164.x - Node Permission Model Bypass via Default TailwindCSS Child-Process Grant

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   L   L   N   N   P   H   H   H    9.3   .0028   18.7     —

AFFECTED
  Product  Versions   Fixed
  hugo     0.162.0 –  —

TIMELINE
  Aug 18  Reserved by VulnCheck
  Aug 18  Published (CNA: VulnCheck)
  Sep 29  EXPLOIT PUBLISHED — CVE-2026-75926 (gohugoio hugo). Public exploit reference added.

CWE-1188 · CNA: VulnCheck · CVSS v4.0 · 6 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 18, 2026	Reserved	Reserved by VulnCheck
August 18, 2026	Published	Published (CNA: VulnCheck)
September 29, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-75926 (gohugoio hugo). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
gohugoio	hugo	—	0.162.0	—

Weaknesses

CWE-1188

References (6)

https://github.com/gohugoio/hugo [Product]
https://github.com/gohugoio/hugo/blob/v0.164.0/common/hexec/exec.go#L292-L295 [Product]
https://github.com/gohugoio/hugo/blob/v0.164.0/config/security/securityConfig.go#L72-L79 [Product]
https://github.com/gohugoio/hugo/commit/8a55df7af2e6da31297245cc54fa2e3b521d93e8 [Patch]
https://github.com/gohugoio/hugo/issues/15178 [Issue Tracking, Patch, Vendor Advisory]
https://www.vulncheck.com/advisories/hugo-to-x-node-permission-model-bypass-via-default-tailwindcss-child-process-grant [Exploit, Patch, Third Party Advisory]

Authoritative record: CVE-2026-75926 at cve.org

Vendors: gohugoio

Weaknesses: CWE-1188

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-75926 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.