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CVE-2026-55411
medium
CVSS 6.8
Vulnerability in CVE-2026-55411 (CVE-2026-55411)
Summary
vulnerability in CVE-2026-55411 (CVE-2026-55411). Confidential information can be exposed externally. Exploitable via `POST /api/data-sources/decrypt`. Mitigation: upgrade to `3.20.1780-lts` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-55411** has been found in CVE-2026-55411.
Attackers can target a specific entry point like `POST /api/data-sources/decrypt` over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 6.8/10.
What to do: upgrade CVE-2026-55411 to **3.20.1780-lts** or later.
If unsure, ask your IT team or search "CVE-2026-55411 CVE-2026-55411" on the vendor's site.
CVE-2026-55411 (CVE-2026-55411) — CWE-639 / CVSS v3 6.8
Attack vector: adjacent-network / no user interaction
Attack surface: POST /api/data-sources/decrypt
Patched: `3.20.1780-lts` — 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
**A vulnerability** (CWE-639) exists in CVE-2026-55411. Attackers reach the vulnerable code path via `POST /api/data-sources/decrypt` without authentication.
📍 Affected scope
CVE-2026-55411 — . Attack surface: POST /api/data-sources/decrypt.
🔥 Severity
Severity: Medium (CVSS 6.8/10). Confidential information can be exposed externally
🔧 How to fix
Update to **3.20.1780-lts**.
🛡️ 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 `POST /api/data-sources/decrypt` requests with malformed payloads or SQL meta-characters. Audit SBOM/dependencies 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
Audit SBOM/dependencies for affected components.依存マニフェストで影響コンポーネントを特定する。
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3Hunt for indicators of compromise detect
grep 'POST /api/data-sources/decrypt' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで `POST /api/data-sources/decrypt` への異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。
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6Apply patch patch
Upgrade to 3.20.1780-ltsステージング環境で 3.20.1780-lts 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
Replay attack against POST /api/data-sources/decrypt on staging to confirm patch closes the vector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。