CVE-2026-27887
📋 TL;DR
This vulnerability in Spin allows denial-of-service attacks through memory exhaustion when processing large database or HTTP responses. Attackers can crash the Spin host process by causing it to buffer excessively large responses. Users running vulnerable Spin versions with database or web server connections are affected.
💻 Affected Systems
- Spin
- SpinKube
- containerd-shim-spin
⚠️ 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 service disruption as the Spin host process crashes due to out-of-memory conditions, potentially affecting all applications running on that instance.
Likely Case
Intermittent service outages when legitimate large responses or malicious queries trigger memory exhaustion, requiring manual restart of affected services.
If Mitigated
Controlled response handling with size limits prevents memory exhaustion, maintaining service availability even with large legitimate responses.
🎯 Exploit Status
Exploitation requires ability to insert data into connected databases or influence HTTP server responses, but the attack itself is straightforward once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Spin 3.6.1, SpinKube 0.6.2, containerd-shim-spin 0.22.1
Vendor Advisory: https://github.com/spinframework/spin/security/advisories/GHSA-mv4f-6ffm-32wx
Restart Required: Yes
Instructions:
1. Stop all Spin applications. 2. Update Spin to version 3.6.1 or later using your package manager. 3. Update SpinKube to 0.6.2 or later if using Kubernetes. 4. Update containerd-shim-spin to 0.22.1 or later if using containerd. 5. Restart all Spin applications.
🔧 Temporary Workarounds
Restrict database and HTTP server access
allConfigure Spin to only connect to trusted databases and HTTP servers that implement response size limits
🧯 If You Can't Patch
- Implement strict response size limits on all databases and HTTP servers connected to Spin
- Monitor Spin process memory usage and implement automatic restart policies for memory exhaustion events
🔍 How to Verify
Check if Vulnerable:
Check Spin version with 'spin --version' and verify it's below 3.6.1. For SpinKube, check deployment manifests for version below 0.6.2. For containerd-shim-spin, check version below 0.22.1.Check Version:
spin --versionVerify Fix Applied:
Confirm version is at least Spin 3.6.1, SpinKube 0.6.2, or containerd-shim-spin 0.22.1 using respective version commands.📡 Detection & Monitoring
Log Indicators:
- Spin process crashes with out-of-memory errors
- Abnormally large database query responses
- Sudden service restarts
Network Indicators:
- Unusually large HTTP responses from Spin-connected services
- Spikes in memory usage correlated with database queries
SIEM Query:
source="spin" AND ("panic" OR "out of memory" OR "OOM")