Code Injection in Langflow macOS (CVE-2026-8481)
Summary
Code injection in Langflow macOS (CVE-2026-8481). Successful exploitation can lead to full system takeover. Exploitable via POST /api/v1/validate/code.
Original description
The description as published by the source.
IBM Langflow OSS 1.0.0 through 1.10.0 contain a critical remote code execution vulnerability in the code validation API endpoint. The POST /api/v1/validate/code endpoint accepts user-supplied Python code and executes it directly using Python's built-in exec() function without sandboxing, input validation, or privilege restrictions, enabling any authenticated user to execute arbitrary system commands with the full privileges of the Langflow server process.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-8481 has been found in Langflow macOS.
Attackers can target a specific entry point like POST /api/v1/validate/code over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 9.9/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Langflow macOS CVE-2026-8481" on the vendor's site.
CVE-2026-8481 (Langflow macOS) — CWE-94 / CVSS v3 9.9
Attack vector: remote (network-reachable) / no user interaction
Attack surface: POST /api/v1/validate/code
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.
Arbitrary code execution (CWE-94) exists in Langflow macOS. Attackers reach the vulnerable code path via POST /api/v1/validate/code.
Check the vendor advisory for the affected versions of Langflow macOS. Attack surface: POST /api/v1/validate/code.
Severity: Critical (CVSS 9.9/10). Successful exploitation can lead to full system takeover.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual POST /api/v1/validate/code requests with malformed payloads or SQL meta-characters. Run grep -r 'macOS' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'macOS' . | 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
macOSを grep し、稼働しているサービス・バージョンを把握する。 -
2Hunt for indicators of compromise detect
grep 'POST /api/v1/validate/code' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
POST /api/v1/validate/codeへの異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。 -
3Post-deployment verification verify
Replay attack against POST /api/v1/validate/code on staging to confirm patch closes the vector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 2 と同じログクエリでアラート再発が無いか継続監視。
References
- patch psirt@us.ibm.com
- web nvd.nist.gov
- web github.com