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TI-2026-71359 Aliases CVE-2026-109574GHSA-454m-4vr5-7p63

Path traversal in Hugo css.Sass exposes files outside project root

Priority LOW 29CWE-22Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 1 fixed, 3 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-22 and the CVSS impact.

Summary

Hugo before v0.167.0 has a path traversal flaw (CWE-22) in css.Sass that lets malicious themes or modules read files outside the project root through the Sass compiler's import fallback. An attacker who ships a crafted stylesheet with relative, absolute, or symlinked @import or @use targets can compile readable files into the published site CSS.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Hugo before v0.167.0 contains a path traversal vulnerability in css.Sass that allows malicious themes or modules to read files outside the project root through the Sass compiler's import fallback. Attackers can ship stylesheets with relative, absolute, or symlinked @import or @use targets to compile readable files into the published site CSS.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00144 3rd percentileScored 2026-11-08
Fix Partial hugo (gohugoio): 0.167.0Red Hat: 1 advisoryRed Hat: 1 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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 0.167.00.167.0Patch availableCNA
  • hugo Vendorgohugoio Affected before 0.167.0 Fixed in 0.167.0 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

Upgrade Hugo to version 0.167.0 or later and install RHSA-2026:80677 for Red Hat Hardened Images. The sources list no fixed version for Red Hat Enterprise Linux 10, Red Hat OpenShift GitOps or Red Hat OpenStack Platform 18.0.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA hugo (gohugoio) Fixed in 0.167.0

Red Hat 1 advisory

  • RHSA-2026:80677 Released 2026-10-12 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images hugo-0.167.0-0.2.hum1@aarch64, hugo-0.167.0-0.2.hum1@s390x, hugo-0.167.0-0.2.hum1@src +1

Fixed in the same release

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

  • Release ·

    gohugoio hugo 0.167.0

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2026-71361 Symlink following in Hugo exposes files outside theme rootPriority LOW 29
    • TI-2026-71360 Hugo path traversal in js.Build ESBuild resolver exposes files outside projectPriority LOW 29
    • TI-2026-71362 Stored cross-site scripting in Hugo via table of contents heading IDsPriority LOW 22
    Show all 4 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat OpenShift GitOpsAffectedNo fix yet: Fix deferred
Red Hat OpenStack Platform 18.0AffectedNo fix yet: Fix deferred
Red Hat Hardened ImagesFixed RHSA-2026:80677
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-109574
  2. 2026-10-13 Alias added: GHSA-454m-4vr5-7p63
  3. 2026-10-13 Priority changed: MEDIUM → LOW
  4. 2026-10-20 Fix available: RHSA-2026:80677 · Red Hat
  5. 2026-10-20 Fix available: Red Hat Hardened Images · Red Hat
  6. 2026-10-20 CVSS score added · Red Hat
  7. 2026-10-26 CISA SSVC decision points changed

References

Advisory 1

  • TI-2026-60433 Hugo before v0.165.0 Insufficient Permission Restriction via TailwindCSS CVSS 4.0CRITICAL 9.3
  • 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
See all 24 →

Sources

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