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UBUNTU-CVE-2025-66418
Vulnerability in python-urllib3 (UBUNTU-CVE-2025-66418)
Summary
vulnerability in python-urllib3 (UBUNTU-CVE-2025-66418). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `2.6.0` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **UBUNTU-CVE-2025-66418** has been found in python-urllib3.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade python-urllib3 to **2.6.0** or later.
If unsure, ask your IT team or search "python-urllib3 UBUNTU-CVE-2025-66418" on the vendor's site.
UBUNTU-CVE-2025-66418 (python-urllib3) —
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: `2.6.0` — 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 python-urllib3.
📍 Affected scope
python-urllib3 — .
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **2.6.0**.
🛡️ 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-urllib3' .` 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
-
1Identify exposure identify
grep -r 'python-urllib3' . | 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-urllib3` を grep し、稼働しているサービス・バージョンを把握する。
-
6Apply patch patch
Upgrade python-urllib3 to 2.6.0ステージング環境で 2.6.0 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。
-
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
Ubuntu:Pro:20.04:LTS
python-urllib3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.25.8-2ubuntu0.4+esm2"}]}]
Ubuntu:22.04:LTS
python-pip
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
python-urllib3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.26.5-1~exp1ubuntu0.4"}]}]
Ubuntu:24.04:LTS
python-pip
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:24.04:LTS
python-urllib3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.7-1ubuntu0.3"}]}]
Ubuntu:25.10
python-pip
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:25.10
python-urllib3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.0-3ubuntu0.1"}]}]
Ubuntu:26.04:LTS
python-pip
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.04:LTS
python-urllib3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.0-1ubuntu1"}]}]
Ubuntu:Pro:22.04:LTS
python-pip
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"22.0.2+dfsg-1ubuntu0.7+esm1"}]}]
Ubuntu:Pro:24.04:LTS
python-pip
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"24.0+dfsg-1ubuntu1.3+esm1"}]}]
References
- advisory https://ubuntu.com/security/notices/USN-7927-1
- advisory https://ubuntu.com/security/notices/USN-8010-1
- advisory https://ubuntu.com/security/notices/USN-8344-1
- report https://ubuntu.com/security/CVE-2025-66418
- report https://www.cve.org/CVERecord?id=CVE-2025-66418
- report https://www.openwall.com/lists/oss-security/2025/12/05/4
- report https://github.com/urllib3/urllib3/security/advisories/GHSA-gm62-xv2j-4w53