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TI-2026-64850 Aliases CVE-2026-100694GHSA-98xc-jpvp-56pj

Hugo before 0.166.0 Cross-Site Scripting via text/org

Priority LOW 22CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · 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-79.

Summary

Hugo is a static site generator. In versions from v0.56.0 through v0.165.x, content files mapped to the text/org media type are rendered without escaping raw HTML: Org export blocks and @@html:...@@ snippets pass HTML through unescaped, resulting in cross-site scripting (XSS) in the generated site. An attacker who can supply or influence a content file under /content or the output of a content adapter can inject scripts that execute in the browsers of visitors to the affected pages. Only pages whose source file or content-adapter output declares the text/org media type are affected, and sites that fully trust all content sources are not impacted. Version v0.166.0 fixes the issue by introducing a security.allowContent allowlist that denies text/org by default; sites that intentionally author Org Mode content can opt back in with [security] allowContent = ['.*'].

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00188 8th percentileScored 2026-11-07
Fix Partial hugo (gohugoio): 0.166.0Red 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
gohugoiohugo0.56.0 to before 0.166.00.166.0Patch availableCNA
  • hugo Vendorgohugoio Affected 0.56.0 to before 0.166.0 Fixed in 0.166.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:gohugo:hugo:*:*:*:*:*:*:*:*0.56.0 to before 0.166.0Vulnerablegohugoio
  • cpe:2.3:a:gohugo:hugo:*:*:*:*:*:*:*:* Versions 0.56.0 to before 0.166.0 Vulnerable ·gohugoio

Remediation

  • Fix · CNA hugo (gohugoio) Fixed in 0.166.0

Red Hat 1 advisory

  • RHSA-2026:66266 Released 2026-09-09 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images hugo-0.166.0-0.1.hum1@aarch64, hugo-0.166.0-0.1.hum1@src, hugo-0.166.0-0.1.hum1@x86_64

Fixed in the same release

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

  • Release ·

    gohugoio hugo 0.166.0

    5 records Highest priority Priority MEDIUM 2 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2026-64848 Hugo before v0.166.0 Path Traversal via Symlinked Mount RootsPriority MEDIUM 44
    • TI-2026-64846 Hugo v0.161.0 to v0.165.0 Arbitrary File Read via SymlinksPriority MEDIUM 44
    • TI-2026-64849 Hugo v0.162.0 before v0.166.0 IP-literal Deny Rule BypassPriority LOW 38
    Show all 5 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-2026:66266
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-100694
  2. 2026-10-03 Alias added: GHSA-98xc-jpvp-56pj

References

Advisory 1

  • 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