Sign in Sign up
JA · EN · FR
SecPulse
← Back
CVE-2026-6100 high CVSS 8.1

Use-After-Free in python (CVE-2026-6100)

Summary

vulnerability in python (CVE-2026-6100). Successful exploitation can lead to full system takeover. Exploitable via ``lzma.LZMADecompressor``. Mitigation: upgrade to `3.14.5` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **CVE-2026-6100** has been found in python. Attackers can target a specific entry point like ``lzma.LZMADecompressor`` over the network to misuse the product. Successful exploitation can lead to full system takeover. CVSS score: 8.1/10. What to do: upgrade python to **3.14.5** or later. If unsure, ask your IT team or search "python CVE-2026-6100" on the vendor's site.
CVE-2026-6100 (python) — CWE-416 / CVSS v3 8.1 Attack vector: remote (network-reachable) / unauthenticated / no user interaction Attack surface: `lzma.LZMADecompressor` / `bz2.BZ2Decompressor` / `gzip.GzipFile` / `MemoryError` Patched: `3.14.5` — 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
**use-after-free** (CWE-416) exists in python. Attackers reach the vulnerable code path via ``lzma.LZMADecompressor`` without authentication.
📍 Affected scope
python — . Attack surface: `lzma.LZMADecompressor` / `bz2.BZ2Decompressor` / `gzip.GzipFile` / `MemoryError`.
🔥 Severity
Severity: High (CVSS 8.1/10). Successful exploitation can lead to full system takeover
🔧 How to fix
Update to **3.14.5**.
🛡️ 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 'python' .` 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. 1
    Identify exposure identify 
    grep -r 'python' . | 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 `python` を grep し、稼働しているサービス・バージョンを把握する。

  2. 6
    Apply patch patch 
    Upgrade python to 3.14.5

    ステージング環境で 3.14.5 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。

  3. 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

Bitnami python
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.14.5"}]}]
Bitnami libpython
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.14.5"}]}]
Bitnami python-min
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.14.5"}]}]

References

🍪 About cookies

We use cookies to keep you logged in, remember your language, and improve the service.

Details →