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CVE-2026-21439
Vulnerability in badkeys (CVE-2026-21439)
Summary
vulnerability in badkeys (CVE-2026-21439). Risk of unauthorized operations or information disclosure. Exploitable via ``badkeys``. Mitigation: upgrade to `0.0.16` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-21439** has been found in badkeys.
Attackers can target a specific entry point like ``badkeys`` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade badkeys to **0.0.16** or later.
If unsure, ask your IT team or search "badkeys CVE-2026-21439" on the vendor's site.
CVE-2026-21439 (badkeys) — CWE-150 /
Attack surface: `badkeys`
Patched: `0.0.16` — 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-150) exists in badkeys. Attackers reach the vulnerable code path via ``badkeys`` without authentication.
📍 Affected scope
badkeys — . Attack surface: `badkeys`.
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **0.0.16**.
🛡️ 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. Run `grep -r 'badkeys' .` 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 'badkeys' . | 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 `badkeys` 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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6Apply patch patch
Upgrade badkeys to 0.0.16ステージング環境で 0.0.16 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
PyPI
badkeys
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.16"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-21439
- advisory https://github.com/advisories/GHSA-wjpc-4f29-83h3
- package https://github.com/badkeys/badkeys
- package https://pypi.org/project/badkeys
- web https://github.com/badkeys/badkeys/security/advisories/GHSA-wjpc-4f29-83h3
- web https://github.com/badkeys/badkeys/issues/40
- web https://github.com/badkeys/badkeys/commit/635a2f3b1b50a895d8b09ec8629efc06189f349a
- web https://github.com/badkeys/badkeys/commit/de631f69f040974bb5fb442cdab9a1d904c64087