CVE-2026-44500 — Insecure Deserialization

title: ZEBRA Insecure Deserialization - Large Buffer Allocation - CVE-2026-44500
id: scw-2026-05-08-ai-1
status: experimental
level: critical
description: |
  Detects the execution of the ZEBRA daemon (zebrad) with command-line arguments that could be indicative of an attempt to exploit CVE-2026-44500. The vulnerability allows an attacker to force the node to preallocate and parse for orders of magnitude more data than intended by manipulating deserialization paths related to transport or block-size ceilings. This rule looks for specific command-line arguments associated with buffer sizing that, when combined with the zebrad executable, suggest a potential exploitation attempt before the tighter protocol or consensus limits are enforced.
author: SCW Feed Engine (AI-generated)
date: 2026-05-08
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-44500/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: process_creation
detection:
  selection:
      Image|contains:
          - 'zebrad'
      CommandLine|contains:
          - '--max-outbound-message-size'
          - '--max-block-response-size'
      condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse