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CVE-2026-33053
Vulnerability in langflow (CVE-2026-33053)
Summary
vulnerability in langflow (CVE-2026-33053). Successful exploitation can lead to full system takeover. Mitigation: upgrade to `1.9.0` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-33053** has been found in langflow.
Successful exploitation can lead to full system takeover. CVSS score: ?/10.
What to do: upgrade langflow to **1.9.0** or later.
If unsure, ask your IT team or search "langflow CVE-2026-33053" on the vendor's site.
CVE-2026-33053 (langflow) — CWE-639 /
Attack vector: remote (network-reachable) / no user interaction
Patched: `1.9.0` — 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** (CWE-639) exists in langflow.
📍 Affected scope
langflow — .
🔥 Severity
Severity: ?. Successful exploitation can lead to full system takeover
🔧 How to fix
Update to **1.9.0**.
🛡️ 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 'langflow' .` 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 'langflow' . | 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 `langflow` 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 langflow to 1.9.0ステージング環境で 1.9.0 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
PyPI
langflow
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.0"}]}]
pip
langflow
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.0"}]}]
References
- advisory https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33053.json
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-33053
- package https://github.com/langflow-ai/langflow
- web https://github.com/langflow-ai/langflow/security/advisories/GHSA-rf6x-r45m-xv3w
- web https://github.com/langflow-ai/langflow/commit/fdc1b3b1448ff3317d73d3e769a6c4a1717f74d7
- web https://github.com/langflow-ai/langflow/releases/tag/1.7.2
- web https://github.com/pypa/advisory-database/tree/main/vulns/langflow/PYSEC-2026-78.yaml
- web https://github.com/advisories/GHSA-rf6x-r45m-xv3w