HIGH CVSS 8.0
Published: 2026-05-01

CVE-2026-43003

openstack ironic_python_agent Security Advisory (CVE-2026-43003)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2026-43003 impacting openstack ironic_python_agent. Evaluated with CVSS Base Score of 8.0 (HIGH).

Original NVD Description

Source: NIST NVD
An issue was discovered in OpenStack ironic-python-agent 1.0.0 through 11.5.0. Ironic Python Agent (IPA) sometimes executes grub-install from within a chroot of the deployed partition image, leading to code execution in the case of a malicious image.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Adjacent (AV:A)
Requires shared subnet / local network access
Attack Complexity
High (AC:H)
Depends on race conditions or environment
Privileges Required
Low (PR:L)
Standard user access required
User Interaction
None (UI:N)
Zero human interaction required
Scope
Changed (S:C)
Impacts components beyond caller authority
Confidentiality
High (C:H)
Total information disclosure
Integrity
High (I:H)
Total modification of target system
Availability
High (A:H)
Total denial of service or shutdown

🎯 Affected Versions Matrix

Affected Product openstack / ironic_python_agent
Affected Versions *
Weakness Enumeration CWE-829

Security Research Arsenal: Nuclei Detection Template & PoC Exploit Probe

High-Intent Research Tool

Ready-to-use security scanner signatures, active verification probe skeletons, and remediation playbooks for CVE-2026-43003 impacting openstack ironic_python_agent.

⚡ Nuclei Detection Template (YAML) cve-2026-43003.yaml
id: cve-2026-43003

info:
  name: openstack ironic_python_agent - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: high
  description: |
    Automated signature & scanner for CVE-2026-43003 affecting openstack ironic_python_agent.
    Evaluation: An issue was discovered in OpenStack ironic-python-agent 1.0.0 through 11.5.0. Ironic Python Agent (IPA) sometimes executes grub-install from within a...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2026-43003
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 8.0
    cve-id: CVE-2026-43003
    cwe-id: CWE-829
  tags: cve,cve-2026-43003,openstack,ironic_python_agent,high

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "ironic_python_agent"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2026-43003.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2026-43003
# Target: openstack ironic_python_agent | CVSS: 8.0 (HIGH)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2026-43003 (openstack ironic_python_agent)...")
    headers = {
        "User-Agent": "CyberVault-Audit-Scanner/2.0",
        "Accept": "*/*"
    }
    try:
        r = requests.get(f"{target_url.rstrip('/')}/", headers=headers, timeout=8, verify=False)
        print(f"[+] Server Response: HTTP {r.status_code} | Server Banner: {r.headers.get('Server', 'Unknown')}")
        if r.status_code < 500:
            print(f"[!] Target reachable. Verify version against openstack ironic_python_agent scope (*).")
        return True
    except Exception as e:
        print(f"[-] Connection Error: {e}")
        return False

if __name__ == '__main__':
    url = sys.argv[1] if len(sys.argv) > 1 else "http://localhost:8080"
    verify_vulnerability(url)
🛡️ Quick Patch & Remediation Script (Bash) patch_cve-2026-43003.sh
# Recommended Remediation & Patching Commands for CVE-2026-43003
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install ironic_python_agent 2>/dev/null || \
sudo dnf upgrade ironic_python_agent 2>/dev/null || \
sudo yum update ironic_python_agent

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i ironic_python_agent 2>/dev/null || rpm -qa | grep -i ironic_python_agent

# 3. Docker container & image vulnerability scan:
docker scan $(docker ps -q) 2>/dev/null || echo "Verify upstream base images in Dockerfile."

🛡️ Remediation & Security Action

  • Authoritative Guidance: Follow distribution-specific vendor security notices. Advisory status and package patches vary by distribution release.
  • Verification: Inspect installed binary packages and package manager versions for affected component releases.
  • Upstream Status: Upgrade to verified non-backdoored upstream versions or roll back to known-clean stable releases.
⚠️ Disclaimer: Follow vendor-specific advisories for your operating system. CyberVault does not fabricate unsupported remediation scripts.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2026-43003 in openstack ironic_python_agent?

Review vendor-specific security notices and update openstack ironic_python_agent packages to the latest patched release immediately. If immediate upgrading is restricted by change windows, isolate affected network ports and enforce least-privilege access boundaries.

Is there an active exploit or public PoC for CVE-2026-43003?

No weaponized public exploit has been confirmed in public threat streams yet. Continuous surveillance is active across GitHub and security feeds.

What is the CVSS 3.1 severity rating and impact for CVE-2026-43003?

CVE-2026-43003 is classified with a CVSS 3.1 Base Score of 8.0 (HIGH). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
8.0
HIGH SEVERITY
CVE ID CVE-2026-43003
Weakness CWE-829
Vendor openstack
Product ironic_python_agent
Published 2026-05-01
Vector CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H