CVE-2026-0529
📋 TL;DR
An improper array index validation vulnerability in Packetbeat's MongoDB protocol parser allows attackers to cause buffer overflows via specially crafted network traffic. This affects systems running vulnerable Packetbeat versions with MongoDB protocol monitoring enabled. Attackers must send malformed payloads to monitored network interfaces.
💻 Affected Systems
- Elastic Packetbeat
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data exfiltration, or denial of service.
Likely Case
Packetbeat process crash causing monitoring disruption and potential denial of service.
If Mitigated
Limited impact with proper network segmentation and monitoring disabled on untrusted interfaces.
🎯 Exploit Status
Exploitation requires sending specially crafted MongoDB traffic to monitored interfaces.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.19.10, 9.1.10, or 9.2.4
Vendor Advisory: https://discuss.elastic.co/t/packetbeat-8-19-10-9-1-10-9-2-4-security-update-esa-2026-02/384520
Restart Required: Yes
Instructions:
1. Download latest version from elastic.co/downloads/beats/packetbeat. 2. Stop Packetbeat service. 3. Install updated version. 4. Restart Packetbeat service.
🔧 Temporary Workarounds
Disable MongoDB Protocol Parsing
allTemporarily disable MongoDB protocol monitoring if not required.
Edit packetbeat.yml and set 'protocols.mongodb.enabled: false'
Restart Packetbeat: systemctl restart packetbeat
Restrict Monitored Interfaces
allLimit which network interfaces Packetbeat monitors.
Edit packetbeat.yml and configure 'interfaces' section to trusted networks only
🧯 If You Can't Patch
- Implement network segmentation to restrict access to Packetbeat monitoring interfaces
- Deploy network-based intrusion detection to monitor for malformed MongoDB traffic
🔍 How to Verify
Check if Vulnerable:
Check Packetbeat version and verify MongoDB protocol is enabled in configuration.Check Version:
packetbeat versionVerify Fix Applied:
Confirm version is 8.19.10, 9.1.10, 9.2.4 or later using version check command.📡 Detection & Monitoring
Log Indicators:
- Packetbeat process crashes
- Unexpected termination logs
- MongoDB parsing errors
Network Indicators:
- Unusual MongoDB traffic patterns
- Malformed MongoDB packets to monitoring interfaces
SIEM Query:
process.name:"packetbeat" AND (event.action:"crashed" OR log.level:"error")