CVE-2025-31496
📋 TL;DR
A vulnerability in Apollo Compiler versions before 1.27.0 allows attackers to craft GraphQL queries with deeply nested and reused named fragments that cause exponential resource consumption during validation. This can lead to denial of service in applications using the affected compiler. Any application using apollo-compiler for GraphQL query processing is affected.
💻 Affected Systems
- apollo-compiler
⚠️ 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 CPU/memory exhaustion, potentially crashing the application server and affecting all users.
Likely Case
Degraded performance and intermittent service disruptions when malicious queries are processed.
If Mitigated
Minimal impact with proper query complexity limits and monitoring in place.
🎯 Exploit Status
Exploitation requires only the ability to send GraphQL queries, which is typically available to all users of GraphQL APIs.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.27.0
Vendor Advisory: https://github.com/apollographql/apollo-rs/security/advisories/GHSA-7mpv-9xg6-5r79
Restart Required: Yes
Instructions:
1. Update apollo-compiler dependency to version 1.27.0 or later. 2. Update Cargo.toml: apollo-compiler = "^1.27.0". 3. Run cargo update. 4. Rebuild and redeploy your application.
🔧 Temporary Workarounds
Implement query complexity limits
allAdd middleware to limit query depth, complexity, or fragment usage before validation.
Rate limit GraphQL endpoints
allImplement rate limiting to prevent repeated malicious query attempts.
🧯 If You Can't Patch
- Implement WAF rules to block queries with excessive fragment nesting
- Deploy query analysis middleware that rejects queries with deep fragment recursion
🔍 How to Verify
Check if Vulnerable:
Check your Cargo.toml or Cargo.lock for apollo-compiler version < 1.27.0Check Version:
grep apollo-compiler Cargo.lockVerify Fix Applied:
Verify apollo-compiler version is 1.27.0 or higher in Cargo.lock after update📡 Detection & Monitoring
Log Indicators:
- Unusually long query processing times
- High CPU/memory usage spikes during query validation
- Query timeouts or 5xx errors
Network Indicators:
- Large GraphQL query payloads with repeated fragment definitions
- Sudden increase in query size or complexity
SIEM Query:
source="application_logs" AND ("query timeout" OR "validation error" OR "memory limit") AND process="graphql"