CVE-2026-2676
📋 TL;DR
This CVE describes an improper authorization vulnerability in GoogTech sms-ssm's API interface that allows attackers to bypass authentication controls. The vulnerability exists in the preHandle function of LoginInterceptor.java and can be exploited remotely. All systems running affected versions of sms-ssm are vulnerable to unauthorized access.
💻 Affected Systems
- GoogTech sms-ssm
⚠️ 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
Complete system compromise through unauthorized administrative access, data exfiltration, or service disruption
Likely Case
Unauthorized access to sensitive API endpoints, potential data leakage, and privilege escalation
If Mitigated
Limited impact with proper network segmentation and authentication controls in place
🎯 Exploit Status
Exploit code is publicly available on GitHub issues; attack can be performed remotely without authentication
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Commit after e8534c766fd13f5f94c01dab475d75f286918a8d
Vendor Advisory: https://github.com/GoogTech/sms-ssm/issues/27
Restart Required: Yes
Instructions:
1. Pull latest code from GitHub repository 2. Rebuild the application 3. Deploy updated version 4. Restart the service
🔧 Temporary Workarounds
Network Access Control
linuxRestrict access to API endpoints using firewall rules
iptables -A INPUT -p tcp --dport [API_PORT] -s [TRUSTED_NETWORK] -j ACCEPT
iptables -A INPUT -p tcp --dport [API_PORT] -j DROP
API Gateway Protection
allPlace API gateway with authentication in front of vulnerable service
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable systems
- Deploy web application firewall (WAF) with authentication bypass detection rules
🔍 How to Verify
Check if Vulnerable:
Check if current commit hash is e8534c766fd13f5f94c01dab475d75f286918a8d or earlier in the repositoryCheck Version:
git log --oneline -1Verify Fix Applied:
Verify current commit hash is newer than e8534c766fd13f5f94c01dab475d75f286918a8d📡 Detection & Monitoring
Log Indicators:
- Unauthorized API access attempts
- Failed authentication logs followed by successful requests
- Unusual API endpoint access patterns
Network Indicators:
- Unusual API traffic patterns
- Requests bypassing authentication endpoints
- Traffic from unexpected sources to API ports
SIEM Query:
source="application.logs" AND ("preHandle" OR "LoginInterceptor") AND ("unauthorized" OR "bypass")🔗 References
- https://github.com/GoogTech/sms-ssm/
- https://github.com/GoogTech/sms-ssm/issues/27
- https://github.com/GoogTech/sms-ssm/issues/27#issue-3878817166
- https://github.com/GoogTech/sms-ssm/issues/27#issuecomment-3828063958
- https://vuldb.com/?ctiid.346469
- https://vuldb.com/?id.346469
- https://vuldb.com/?submit.749702
