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TI-2026-60433 Aliases CVE-2026-89259GHSA-c34r-xm66-hh3p

Hugo before v0.165.0 Insufficient Permission Restriction via TailwindCSS

Priority MEDIUM 49CWE-250Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-250.

Summary

Hugo is a static site generator. From v0.161.0, Hugo executes Node tools under Node's permission model, but TailwindCSS — included in the default security.exec.allow list — requires a highly permissive configuration (--allow-addons, --allow-child-process, --allow-worker). As a result, the restrictions intended by the fix for GHSA-x597-9fr4-5857 could still be bypassed, allowing a Node tool invoked during a build to read and write files outside the project's working directory. Affected versions are those after v0.43; the issue was fixed in v0.165.0 by removing tailwindcss from the default security.exec.allow list. Users who do not use TailwindCSS, or who only build trusted sites, are not affected. As a workaround, users can define a restrictive security.exec.allow list in hugo.toml.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00587 48th percentileScored 2026-11-07
Fix Fixed hugo (gohugoio): 0.165.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
gohugoiohugobefore 0.165.00.165.0Patch availableCNA
  • hugo Vendorgohugoio Affected before 0.165.0 Fixed in 0.165.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:gohugo:hugo:*:*:*:*:*:*:*:*——gohugoio
  • cpe:2.3:a:gohugo:hugo:*:*:*:*:*:*:*:* Versions — — ·gohugoio

Remediation

  • Fix · CNA hugo (gohugoio) Fixed in 0.165.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    gohugoio hugo 0.165.0

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2026-60432 Hugo before v0.165.0 Symlink Confinement Bypass via resources.GetPriority MEDIUM 48
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-89259
  2. 2026-10-03 Alias added: GHSA-c34r-xm66-hh3p

References

Advisory 1

  • TI-2026-60432 Hugo before v0.165.0 Symlink Confinement Bypass via resources.Get CVSS 4.0CRITICAL 9.3
  • TI-2026-64848 Hugo before v0.166.0 Path Traversal via Symlinked Mount Roots CVSS 4.0HIGH 8.7
  • TI-2026-64846 Hugo v0.161.0 to v0.165.0 Arbitrary File Read via Symlinks CVSS 4.0HIGH 8.7
  • TI-2026-53153 Hugo 0.162.0 to 0.164.x - Node Permission Model Bypass via Default TailwindCSS Child-Process Grant CVSS 4.0CRITICAL 9.3
  • TI-2020-16105 Hugo can execute a binary from the current directory on Windows CVSS 3.1HIGH 8.5
  • TI-2026-64849 Hugo v0.162.0 before v0.166.0 IP-literal Deny Rule Bypass CVSS 4.0HIGH 8.6
See all 24 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences