CVE-2026-3385
📋 TL;DR
This vulnerability in wren-lang allows uncontrolled recursion in the resolveLocal function, which can lead to denial of service through stack exhaustion. Only local attackers can exploit this vulnerability, requiring access to the system running the vulnerable wren interpreter. Users of wren-lang up to version 0.4.0 are affected.
💻 Affected Systems
- wren-lang
⚠️ 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 denial of service through stack exhaustion, crashing the wren interpreter process and potentially affecting dependent applications.
Likely Case
Local denial of service causing wren interpreter crashes when malicious code is executed.
If Mitigated
Minimal impact if proper sandboxing and resource limits are enforced on wren execution environments.
🎯 Exploit Status
Exploit requires local access to execute malicious wren code. Public proof-of-concept available in GitHub repository.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Monitor wren-lang GitHub repository for updates. Consider workarounds or alternative implementations.
🔧 Temporary Workarounds
Sandbox wren execution
linuxRun wren interpreters with strict resource limits and in isolated environments
ulimit -s 8192
docker run --memory=256m --cpus=0.5 wren_app
Input validation
allValidate and sanitize all wren code before execution
🧯 If You Can't Patch
- Isolate wren execution to dedicated containers or VMs with strict resource limits
- Implement monitoring for wren process crashes and abnormal resource consumption
🔍 How to Verify
Check if Vulnerable:
Check wren version: wren --version or examine package manager outputCheck Version:
wren --versionVerify Fix Applied:
Verify version is greater than 0.4.0 when patch becomes available📡 Detection & Monitoring
Log Indicators:
- Segmentation fault errors from wren processes
- Stack overflow messages
- Abnormal wren process termination
Network Indicators:
- None - local exploitation only
SIEM Query:
process.name:"wren" AND (event.type:"crash" OR event.type:"segfault")