HIGH CVSS 7.8
Published: 2026-09-14

CVE-2026-82430

Software Component Security Advisory (CVE-2026-82430)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2026-82430 impacting Software Component. Evaluated with CVSS Base Score of 7.8 (HIGH).

Original NVD Description

Source: NIST NVD
Description When launching a Docker or OCI worker, the setuid-root `worker-launcher` first changes ownership of the entire worker directory to the untrusted topology user, and only afterwards reads and acts on the command file that the supervisor wrote into that same directory. The file is opened without `O_NOFOLLOW` and without re-verifying its owner, so between the ownership change and the read the tenant can replace its contents. For the Docker path the parsed command is executed with real uid 0, and the command sanitiser is not a privilege boundary: it admits `-v` with an arbitrary source, `--device`, `--cap-add`, `--security-opt`, `--user` and `--net`, and copies positional arguments through verbatim. A rewritten file therefore yields an attacker-authored, root-equivalent container invocation with the host filesystem available. For the OCI path the same rewrite window applies, and mount validation is structural only, with no source or destination allow-list, so arbitrary host paths can be bind-mounted read-write into the container. The `username` field of the command file is likewise attacker-settable and is checked only against non-root and minimum-uid rules, permitting execution as another tenant's uid. Mitigation Upgrade to 3.1.0, where the command file is validated before the ownership change and re-verified on open, and where mount sources and destinations are constrained by configuration. Users who cannot upgrade immediately should disable Docker and OCI worker isolation, or restrict topology submission on affected supervisors to trusted principals. Note that the launcher must be rebuilt and reinstalled after upgrading. Credit The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.

📊 CVSS v3.1 Metric Breakdown

🎯 Affected Versions Matrix

Affected Product Generic/Unknown / Software Component
Affected Versions Unspecified
Weakness Enumeration CWE-Not-Specified

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-2026-82430 impacting Software Component.

⚡ Nuclei Detection Template (YAML) cve-2026-82430.yaml
id: cve-2026-82430

info:
  name: Software Component - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: high
  description: |
    Automated signature & scanner for CVE-2026-82430 affecting Software Component.
    Evaluation: Description

When launching a Docker or OCI worker, the setuid-root `worker-launcher` first changes ownership of the
entire worker directory to the un...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2026-82430
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 7.8
    cve-id: CVE-2026-82430
    cwe-id: CWE-Not-Specified
  tags: cve,cve-2026-82430,generic,software,high

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "Server"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2026-82430.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2026-82430
# Target: Software Component | CVSS: 7.8 (HIGH)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2026-82430 (Software Component)...")
    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 Software Component scope (Unspecified).")
        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-2026-82430.sh
# Recommended Remediation & Patching Commands for CVE-2026-82430
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install software 2>/dev/null || \
sudo dnf upgrade software 2>/dev/null || \
sudo yum update software

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

# 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.

🔗 Verified Technical References

Authorities
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Distributions
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Technical Analysis
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❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2026-82430 in Software Component?

Review vendor-specific security notices and update Software Component 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-2026-82430?

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-2026-82430?

CVE-2026-82430 is classified with a CVSS 3.1 Base Score of 7.8 (HIGH). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
7.8
HIGH SEVERITY
CVE ID CVE-2026-82430
Weakness CWE-Not-Specified
Vendor Generic/Unknown
Product Software Component
Published 2026-09-14
Vector N/A