CVE-2026-2818
📋 TL;DR
CVE-2026-2818 is a zip-slip path traversal vulnerability in Spring Data Geode's import snapshot functionality that allows attackers to write arbitrary files outside the intended extraction directory. This could lead to remote code execution or system compromise. Only Windows systems running vulnerable Spring Data Geode versions are affected.
💻 Affected Systems
- Spring Data Geode
⚠️ 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 with SYSTEM/administrator privileges leading to complete system compromise, data exfiltration, or ransomware deployment.
Likely Case
Arbitrary file write leading to privilege escalation, service disruption, or data manipulation.
If Mitigated
Limited impact due to proper file system permissions, network segmentation, and monitoring controls.
🎯 Exploit Status
Exploitation requires access to the import snapshot endpoint/functionality. Path traversal techniques are well-documented and easy to implement.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not yet released
Vendor Advisory: https://www.herodevs.com/vulnerability-directory/cve-2026-2818
Restart Required: Yes
Instructions:
1. Monitor Spring Data Geode security advisories. 2. Apply official patch when released. 3. Restart affected services after patching.
🔧 Temporary Workarounds
Disable Import Snapshot Functionality
allTemporarily disable or restrict access to the import snapshot feature until patch is available.
Configure application properties to disable snapshot import or restrict via firewall/access controls
Implement Input Validation
allAdd custom validation to reject zip entries with path traversal sequences (../, ..\) before extraction.
Implement file path sanitization in custom code before calling vulnerable import functionality
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Spring Data Geode instances from critical systems.
- Apply principle of least privilege to file system permissions where extraction occurs.
🔍 How to Verify
Check if Vulnerable:
Check if running Spring Data Geode on Windows with import snapshot functionality enabled. Review application configuration and version.Check Version:
Check Spring Data Geode version in application dependencies (e.g., Maven pom.xml, Gradle build.gradle) or runtime logs.Verify Fix Applied:
After patching, test import functionality with malicious zip files containing path traversal sequences to ensure they are rejected.📡 Detection & Monitoring
Log Indicators:
- Failed import attempts with unusual file paths
- File write operations outside expected extraction directories
- Access to import snapshot endpoints from unexpected sources
Network Indicators:
- Unusual traffic patterns to import snapshot endpoints
- Large file uploads to import functionality
SIEM Query:
source="spring-geode-logs" AND (event="import_snapshot" AND (path="*../*" OR path="*..\*"))