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CVE-2026-42855
high
CVSS 7.5
Authentication Bypass in CVE-2026-42855 (CVE-2026-42855)
Summary
authentication bypass in CVE-2026-42855 (CVE-2026-42855). Confidential information can be exposed externally. Exploitable via `Authorization header`. Mitigation: upgrade to `3.3.8` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-42855** has been found in CVE-2026-42855.
Attackers can target a specific entry point like `Authorization header` over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 7.5/10.
What to do: upgrade CVE-2026-42855 to **3.3.8** or later.
If unsure, ask your IT team or search "CVE-2026-42855 CVE-2026-42855" on the vendor's site.
CVE-2026-42855 (CVE-2026-42855) — CWE-287 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: Authorization header
Patched: `3.3.8` — 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
**authentication bypass** (CWE-287) exists in CVE-2026-42855. Attackers reach the vulnerable code path via `Authorization header` without authentication.
📍 Affected scope
CVE-2026-42855 — . Attack surface: Authorization header.
🔥 Severity
Severity: High (CVSS 7.5/10). Confidential information can be exposed externally
🔧 How to fix
Update to **3.3.8**.
🛡️ 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. 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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6Apply patch patch
Upgrade to 3.3.8ステージング環境で 3.3.8 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。