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CVE-2026-53724

Cross-Site Scripting (XSS) in parse-server (CVE-2026-53724)

Summary

cross-site scripting in parse-server (CVE-2026-53724). Risk of unauthorized operations or information disclosure. Exploitable via ``poc.svg.``. Mitigation: upgrade to `8.6.79` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **CVE-2026-53724** has been found in parse-server. Attackers can target a specific entry point like ``poc.svg.`` over the network to misuse the product. Risk of unauthorized operations or information disclosure. CVSS score: ?/10. What to do: upgrade parse-server to **8.6.79** or later. If unsure, ask your IT team or search "parse-server CVE-2026-53724" on the vendor's site.
CVE-2026-53724 (parse-server) — CWE-79 / Attack surface: `poc.svg.` Patched: `8.6.79` — apply immediately Workaround: Configure the storage adapter or CDN to derive Content-Type from the filename extension instead of using the stored Content-Type, or replace the default blocklist with an explicit allowlist of needed file extensions. 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 parse-server. Attackers reach the vulnerable code path via ``poc.svg.`` without authentication.
📍 Affected scope
parse-server — . Attack surface: `poc.svg.`.
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **8.6.79**.
🛡️ Workaround
Workaround: Configure the storage adapter or CDN to derive Content-Type from the filename extension instead of using the stored Content-Type, or replace the default blocklist with an explicit allowlist of needed file extensions.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'parse-server' .` 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 'parse-server' . | 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 `parse-server` を grep し、稼働しているサービス・バージョンを把握する。

  2. 5
    Apply temporary workaround mitigate
    Configure the storage adapter or CDN to derive Content-Type from the filename extension instead of using the stored Content-Type, or replace the default blocklist with an explicit allowlist of needed file extensions.

    パッチが適用されるまでの応急処置として、Configure the storage adapter or CDN to derive Content-Type from the filename extension instead of using the stored Content-Type, or replace the default blocklist with an explicit allowlist of needed file extensions. を実施。回避策の副作用 (機能低下) を確認した上で。

  3. 6
    Apply patch patch
    Upgrade parse-server to 8.6.79

    ステージング環境で 8.6.79 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。

  4. 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

npm parse-server
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.6.79"}]}]

References

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