grpc vulnerabilities and fixes

Recent CVEs affecting grpc, with upgrade or downgrade steps. 3 tracked.

grpc has 3 tracked vulnerabilities, 1 critical. A fixed release or vendor patch exists for 3. Most recent: 2026-03-20. Highest priority: CVE-2026-33186 (score 56/100).

• CVE-2026-33186 CRITICAL 9.1 UPGRADE gRPC-Go is the Go language implementation of gRPC
• CVE-2024-7246 MEDIUM 5.3 UPGRADE It's possible for a gRPC client communicating with a HTTP/2 proxy to poison the HPACK table between the proxy
• CVE-2024-11407 HIGH 7.5 UPGRADE There exists a denial of service through Data corruption in gRPC-C++ - gRPC-C++ servers with transmit zero cop

FAQ

How do I fix grpc vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is grpc being exploited right now?

None of the tracked grpc CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which grpc CVE should I patch first?

CVE-2026-33186 currently ranks highest (56/100): gRPC-Go is the Go language implementation of gRPC.

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