MEDIUM CVSS 6.5
Published: 2026-05-11

CVE-2026-28946

apple macos Security Advisory (CVE-2026-28946)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2026-28946 impacting apple macos. Evaluated with CVSS Base Score of 6.5 (MEDIUM).

Original NVD Description

Source: NIST NVD
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5, macOS Tahoe 26.5. Processing maliciously crafted web content may lead to an unexpected Safari crash.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Network (AV:N)
Exploitable remotely across internet boundaries
Attack Complexity
Low (AC:L)
No specialized conditions required
Privileges Required
None (PR:N)
Unauthenticated execution
User Interaction
Required (UI:R)
User must click or open resource
Scope
Unchanged (S:U)
Confined to same security context
Confidentiality
None (C:N)
No data confidentiality impact
Integrity
None (I:N)
No system modification impact
Availability
High (A:H)
Total denial of service or shutdown

🎯 Affected Versions Matrix

Affected Product apple / macos
Affected Versions *
Weakness Enumeration CWE-416

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-2026-28946 impacting apple macos.

⚡ Nuclei Detection Template (YAML) cve-2026-28946.yaml
id: cve-2026-28946

info:
  name: apple macos - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: medium
  description: |
    Automated signature & scanner for CVE-2026-28946 affecting apple macos.
    Evaluation: A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5, macOS Tahoe 26.5. Processing maliciously cra...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2026-28946
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
    cvss-score: 6.5
    cve-id: CVE-2026-28946
    cwe-id: CWE-416
  tags: cve,cve-2026-28946,apple,macos,medium

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "macos"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2026-28946.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2026-28946
# Target: apple macos | CVSS: 6.5 (MEDIUM)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2026-28946 (apple macos)...")
    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 apple macos 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-2026-28946.sh
# Recommended Remediation & Patching Commands for CVE-2026-28946
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install macos 2>/dev/null || \
sudo dnf upgrade macos 2>/dev/null || \
sudo yum update macos

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

# 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-2026-28946 in apple macos?

Review vendor-specific security notices and update apple macos 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-2026-28946?

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-2026-28946?

CVE-2026-28946 is classified with a CVSS 3.1 Base Score of 6.5 (MEDIUM). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
6.5
MEDIUM SEVERITY
CVE ID CVE-2026-28946
Weakness CWE-416
Vendor apple
Product macos
Published 2026-05-11
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H