Vulnerability in py7zr (CVE-2022-44900)

Summary

vulnerability in py7zr (CVE-2022-44900). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `1bb43f17515c7f69673a1c88ab9cc72a7bbef406, 0.20.1` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **CVE-2022-44900** has been found in py7zr. Risk of unauthorized operations or information disclosure. CVSS score: ?/10. What to do: upgrade py7zr to **1bb43f17515c7f69673a1c88ab9cc72a7bbef406, 0.20.1** or later. If unsure, ask your IT team or search "py7zr CVE-2022-44900" on the vendor's site.

CVE-2022-44900 (py7zr) — Patched: `1bb43f17515c7f69673a1c88ab9cc72a7bbef406, 0.20.1` — 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** (unclassified) exists in py7zr.

📍 Affected scope

py7zr — .

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure

🔧 How to fix

Update to **1bb43f17515c7f69673a1c88ab9cc72a7bbef406, 0.20.1**.

🛡️ 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 'py7zr' .` 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

1
Identify exposure identify
```
grep -r 'py7zr' . | 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 `py7zr` を grep し、稼働しているサービス・バージョンを把握する。
6
Apply patch patch
```
Upgrade py7zr to 1bb43f17515c7f69673a1c88ab9cc72a7bbef406, 0.20.1
```
ステージング環境で 1bb43f17515c7f69673a1c88ab9cc72a7bbef406, 0.20.1 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。
7
Post-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 py7zr

[{"repo":"https:\/\/github.com\/miurahr\/py7zr","type":"GIT","events":[{"introduced":"0"},{"fixed":"1bb43f17515c7f69673a1c88ab9cc72a7bbef406"}]},{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.20.1"}]}]