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CVE-2026-35166
Cross-Site Scripting (XSS) in github.com/gohugoio/hugo (CVE-2026-35166)
Summary
cross-site scripting in github.com/gohugoio/hugo (CVE-2026-35166). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `0.159.2` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-35166** has been found in github.com/gohugoio/hugo.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade github.com/gohugoio/hugo to **0.159.2** or later.
If unsure, ask your IT team or search "github.com/gohugoio/hugo CVE-2026-35166" on the vendor's site.
CVE-2026-35166 (github.com/gohugoio/hugo) — CWE-79 /
Patched: `0.159.2` — apply immediately
Workaround: Create custom render hooks for links and images in a Hugo theme/project.
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
❓ What is the problem
**Cross-site scripting (XSS)** (CWE-79) exists in github.com/gohugoio/hugo.
📍 Affected scope
github.com/gohugoio/hugo — .
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **0.159.2**.
🛡️ Workaround
Workaround: Create custom render hooks for links and images in a Hugo theme/project.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'github.com/gohugoio/hugo' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'github.com/gohugoio/hugo' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で `github.com/gohugoio/hugo` を grep し、稼働しているサービス・バージョンを把握する。
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5Apply temporary workaround mitigate
Create custom render hooks for links and images in a Hugo theme/project.パッチが適用されるまでの応急処置として、Create custom render hooks for links and images in a Hugo theme/project. を実施。回避策の副作用 (機能低下) を確認した上で。
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6Apply patch patch
Upgrade github.com/gohugoio/hugo to 0.159.2ステージング環境で 0.159.2 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 3 で見つけた異常検知の続報チェックを含めること。
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7Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
Go
github.com/gohugoio/hugo
[{"type":"SEMVER","events":[{"introduced":"0.60.0"},{"fixed":"0.159.2"}]}]