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CVE-2026-18654
medium
CVSS 6.8
Vulnerability in Amazon awscli (CVE-2026-18654)
Summary
vulnerability in Amazon awscli (CVE-2026-18654). Confidential information can be exposed externally. Mitigation: upgrade to `1.45.28` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-18654** has been found in Amazon awscli.
Confidential information can be exposed externally. CVSS score: 6.8/10.
What to do: upgrade Amazon awscli to **1.45.28** or later.
If unsure, ask your IT team or search "Amazon awscli CVE-2026-18654" on the vendor's site.
CVE-2026-18654 (Amazon awscli) — CWE-322 / CVSS v3 6.8
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: `1.45.28` — apply immediately
Workaround: There is no workaround.
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-322) exists in Amazon awscli.
📍 Affected scope
Amazon awscli — .
🔥 Severity
Severity: Medium (CVSS 6.8/10). Confidential information can be exposed externally
🔧 How to fix
Update to **1.45.28**.
🛡️ Workaround
Workaround: There is no workaround.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'awscli' .` 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 'awscli' . | 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 `awscli` 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
There is no workaround.パッチが適用されるまでの応急処置として、There is no workaround. 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 awscli to 1.45.28ステージング環境で 1.45.28 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
pip
awscli
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.45.28"}]}]
References
- AWS https://aws.amazon.com/security/security-bulletins/rss/2026-071-aws/
- web ff89ba41-3aa1-4d27-914a-91399e9639e5
- web https://github.com/aws/aws-cli/blob/develop/CHANGELOG.rst
- web https://github.com/aws/aws-cli/blob/v2/CHANGELOG.rst
- web https://github.com/aws/aws-cli/security/advisories/GHSA-hqvf-45jj-mccq
- web https://nvd.nist.gov/vuln/detail/CVE-2026-18654
- web https://aws.amazon.com/security/security-bulletins/2026-071-aws
- web https://github.com/advisories/GHSA-hqvf-45jj-mccq