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TI-2026-36906 Aliases CVE-2026-50135GHSA-fw87-fv5r-9fpw

Hugo: Symlink confinement bypass in resources.Get

Priority LOW 31CWE-59Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-59 and the CVSS impact.

Summary

Hugo is a static site generator. From 0.123.0 to 0.161.1, a regression made  RootMappingFs.statRoot  use  Stat  (follows symlinks) instead of  Lstat , so a direct  resources.Get  of a symlink pointing outside its mount returned the target's contents — letting a symlink planted in a local mount (e.g. a vendored  themes/  theme) read arbitrary files accessible to the Hugo user. Go-module themes from GitHub (symlinks stripped) and directory walks were unaffected. Fixed in 0.162.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00411 35th percentileScored 2026-11-07
Fix Fixed hugo (gohugoio): 0.162.0github.com/gohugoio/hugo (Go): 0.162.0Red Hat: 1 advisory

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
gohugoiohugo0.123.0 to before 0.162.00.162.0Patch availableCNA
—github.com/gohugoio/hugo (Go)0.123.0 to before 0.162.00.162.0Patch availableGHSA-fw87-fv5r-9fpw
  • hugo Vendorgohugoio Affected 0.123.0 to before 0.162.0 Fixed in 0.162.0 Patch available CNA
  • github.com/gohugoio/hugo (Go) Vendor— Affected 0.123.0 to before 0.162.0 Fixed in 0.162.0 Patch available GHSA-fw87-fv5r-9fpw

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:gohugo:hugo:*:*:*:*:*:*:*:*0.123.0 to before 0.161.1Vulnerablegohugoio
  • cpe:2.3:a:gohugo:hugo:*:*:*:*:*:*:*:* Versions 0.123.0 to before 0.161.1 Vulnerable ·gohugoio

Remediation

  • Fix · CNA hugo (gohugoio) Fixed in 0.162.0
  • Fix · GHSA-fw87-fv5r-9fpw github.com/gohugoio/hugo (Go) Fixed in 0.162.0 Advisory →

Red Hat 1 advisory

  • RHSA-2026:24577 Released 2026-06-08 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images hugo-0.162.1-1.hum1@aarch64, hugo-0.162.1-1.hum1@src, hugo-0.162.1-1.hum1@x86_64

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Hardened ImagesFixed RHSA-2026:24577

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-50135
  2. 2026-10-03 Alias added: GHSA-fw87-fv5r-9fpw

References

Patch 2

Other 2

  • 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
  • TI-2026-32270 Hugo: Node tool execution allows file system access outside the project directory CVSS 4.0MEDIUM 6.2
See all 15 →

Sources

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