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CVE-2026-45017
Path Traversal in python-liquid (CVE-2026-45017)
Summary
path traversal in python-liquid (CVE-2026-45017). Risk of unauthorized operations or information disclosure. Exploitable via ``FileSystemLoader``. Mitigation: upgrade to `2.2.0` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-45017** has been found in python-liquid.
Attackers can target a specific entry point like ``FileSystemLoader`` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade python-liquid to **2.2.0** or later.
If unsure, ask your IT team or search "python-liquid CVE-2026-45017" on the vendor's site.
CVE-2026-45017 (python-liquid) — CWE-22 /
Attack surface: `FileSystemLoader` / `CachingFileSystemLoader` / `loader`
Patched: `2.2.0` — 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
**Path traversal** (CWE-22) exists in python-liquid. Attackers reach the vulnerable code path via ``FileSystemLoader`` without authentication.
📍 Affected scope
python-liquid — . Attack surface: `FileSystemLoader` / `CachingFileSystemLoader` / `loader`.
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **2.2.0**.
🛡️ 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-liquid' .` 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 'python-liquid' . | 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-liquid` 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 python-liquid to 2.2.0ステージング環境で 2.2.0 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。
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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
python-liquid
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.0"}]}]
PyPI
python-liquid
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.0"}]}]