CVE-2026-7700 — The Function Eval Of The File Src/Lfx/Src/Lfx/Components/Llm Vulnerability

title: CVE-2026-7700 - Langflow LambdaFilterComponent Code Injection
id: scw-2026-05-03-ai-1
status: experimental
level: critical
description: |
  Detects potential exploitation attempts against CVE-2026-7700 in Langflow. This rule specifically targets requests to the '/api/v1/process' endpoint with 'lambda_filter.p' in the query, looking for indicators of code injection within the URI query parameters. This is the primary detection for initial exploitation via the vulnerable LambdaFilterComponent.
author: SCW Feed Engine (AI-generated)
date: 2026-05-03
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-7700/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/api/v1/process'
      cs-method|exact:
          - 'POST'
      cs-uri-query|contains:
          - 'lambda_filter.p'
      # The actual payload will vary, but look for common code injection patterns within the request body or query parameters
      # This is a placeholder for a more specific payload detection if available.
      # Example: A generic indicator of code execution within a query parameter related to lambda_filter.p
      # For a real-world scenario, you would analyze actual exploit payloads.
      # Example: If the payload is passed in a JSON body, a webserver log might not capture it directly. 
      # This rule assumes some part of the exploit is visible in URI or query for webserver logs.
  selection_indicators:
      # This is a highly simplified example. Real-world detection would require analyzing the specific exploit payload.
      # For instance, if the exploit uses Python's eval with untrusted input, look for suspicious function calls.
      # This example looks for a common pattern that might appear in a query string if the exploit is poorly constructed.
      cs-uri-query|contains:
          - 'eval('
          - 'exec('
          - 'import os'
          - 'import subprocess'
      condition: selection AND selection_indicators
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse