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CVE-2026-54498 high CVSS 8.7

Cross-Site Scripting (XSS) in view_component (CVE-2026-54498)

Summary

cross-site scripting in view_component (CVE-2026-54498). Confidential information can be exposed externally. Exploitable via ``around_render``. Mitigation: upgrade to `4.12.0` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **CVE-2026-54498** has been found in view_component. Attackers can target a specific entry point like ``around_render`` over the network to misuse the product. Confidential information can be exposed externally. CVSS score: 8.7/10. What to do: upgrade view_component to **4.12.0** or later. If unsure, ask your IT team or search "view_component CVE-2026-54498" on the vendor's site.
CVE-2026-54498 (view_component) — CWE-79 / CVSS v3 8.7 Attack vector: remote (network-reachable) Attack surface: `around_render` / `html_safe` / `eea79445` / `render_in` Patched: `4.12.0` — apply immediately 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 view_component. Attackers reach the vulnerable code path via ``around_render`` without authentication.
📍 Affected scope
view_component — . Attack surface: `around_render` / `html_safe` / `eea79445` / `render_in`.
🔥 Severity
Severity: High (CVSS 8.7/10). Confidential information can be exposed externally
🔧 How to fix
Update to **4.12.0**.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'view_component' .` 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

  1. 1
    Identify exposure identify 
    grep -r 'view_component' . | 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 `view_component` を grep し、稼働しているサービス・バージョンを把握する。

  2. 6
    Apply patch patch 
    Upgrade view_component to 4.12.0

    ステージング環境で 4.12.0 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。

  3. 7
    Post-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

rubygems view_component
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.12.0"}]}]

References

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