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CVE-2026-53489
medium
CVSS 6.5
Vulnerability in github.com/containerd/containerd/v2 (CVE-2026-53489)
Summary
vulnerability in github.com/containerd/containerd/v2 (CVE-2026-53489). Confidential information can be exposed externally. Exploitable via ``container.log``. Mitigation: upgrade to `2.3.2` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-53489** has been found in github.com/containerd/containerd/v2.
Attackers can target a specific entry point like ``container.log`` over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 6.5/10.
What to do: upgrade github.com/containerd/containerd/v2 to **2.3.2** or later.
If unsure, ask your IT team or search "github.com/containerd/containerd/v2 CVE-2026-53489" on the vendor's site.
CVE-2026-53489 (github.com/containerd/containerd/v2) — CWE-61 / CVSS v3 6.5
Attack vector: local / no user interaction
Attack surface: `container.log`
Patched: `2.3.2` — apply immediately
Workaround: Ensure that only trusted images and checkpoints are used.
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-61) exists in github.com/containerd/containerd/v2. Attackers reach the vulnerable code path via ``container.log`` without authentication.
📍 Affected scope
github.com/containerd/containerd/v2 — . Attack surface: `container.log`.
🔥 Severity
Severity: Medium (CVSS 6.5/10). Confidential information can be exposed externally
🔧 How to fix
Update to **2.3.2**.
🛡️ Workaround
Workaround: Ensure that only trusted images and checkpoints are used.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'github.com/containerd/containerd/v2' .` 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/containerd/containerd/v2' . | 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/containerd/containerd/v2` 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
Ensure that only trusted images and checkpoints are used.パッチが適用されるまでの応急処置として、Ensure that only trusted images and checkpoints are used. 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/containerd/containerd/v2 to 2.3.2ステージング環境で 2.3.2 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/containerd/containerd/v2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.2"}]}]