CVE-2021-3121

An issue was discovered in GoGo Protobuf before 1.3.2. plugin/unmarshal/unmarshal.go lacks certain index validation, aka the "skippy peanut butter" issue.

• CWE-129

• https://discuss.hashicorp.com/t/hcsec-2021-23-consul-exposed-to-denial-of-service-in-gogo-protobuf-dependency/29025Third Party Advisory
• https://github.com/gogo/protobuf/commit/b03c65ea87cdc3521ede29f62fe3ce239267c1bcPatch, Third Party Advisory
• https://github.com/gogo/protobuf/compare/v1.3.1...v1.3.2Patch, Third Party Advisory
• https://lists.apache.org/thread.html/r68032132c0399c29d6cdc7bd44918535da54060a10a12b1591328bff%40%3Cnotifications.skywalking.apache.org%3E
• https://lists.apache.org/thread.html/r88d69555cb74a129a7bf84838073b61259b4a3830190e05a3b87994e%40%3Ccommits.pulsar.apache.org%3E
• https://lists.apache.org/thread.html/rc1e9ff22c5641d73701ba56362fb867d40ed287cca000b131dcf4a44%40%3Ccommits.pulsar.apache.org%3E
• https://security.netapp.com/advisory/ntap-20210219-0006/Third Party Advisory
• https://discuss.hashicorp.com/t/hcsec-2021-23-consul-exposed-to-denial-of-service-in-gogo-protobuf-dependency/29025Third Party Advisory
• https://github.com/gogo/protobuf/commit/b03c65ea87cdc3521ede29f62fe3ce239267c1bcPatch, Third Party Advisory
• https://github.com/gogo/protobuf/compare/v1.3.1...v1.3.2Patch, Third Party Advisory
• https://lists.apache.org/thread.html/r68032132c0399c29d6cdc7bd44918535da54060a10a12b1591328bff%40%3Cnotifications.skywalking.apache.org%3E
• https://lists.apache.org/thread.html/r88d69555cb74a129a7bf84838073b61259b4a3830190e05a3b87994e%40%3Ccommits.pulsar.apache.org%3E
• https://lists.apache.org/thread.html/rc1e9ff22c5641d73701ba56362fb867d40ed287cca000b131dcf4a44%40%3Ccommits.pulsar.apache.org%3E
• https://security.netapp.com/advisory/ntap-20210219-0006/Third Party Advisory

Published

Jan 11, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-31204.NET and Visual Studio Elevation of Privilege Vulnerability7.3
• CVE-2021-31205Windows SMB Client Security Feature Bypass Vulnerability6.5
• CVE-2021-31206Microsoft Exchange Server Remote Code Execution Vulnerabilit…7.6
• CVE-2021-31207Microsoft Exchange Server Security Feature Bypass Vulnerabil…6.6
• CVE-2021-31208Windows Container Manager Service Elevation of Privilege Vul…7.8
• CVE-2021-31209Microsoft Exchange Server Spoofing Vulnerability6.5
• CVE-2021-31211Visual Studio Code Remote Code Execution Vulnerability7.8
• CVE-2021-31213Visual Studio Code Remote Containers Extension Remote Code E…7.8
• CVE-2021-31214Visual Studio Code Remote Code Execution Vulnerability7.8
• CVE-2021-31215SchedMD Slurm before 20.02.7 and 20.03.x through 20.11.x bef…8.8
• CVE-2021-31216Siren Investigate before 11.1.1 contains a server side reque…8.1
• CVE-2021-31217In SolarWinds DameWare Mini Remote Control Server 12.0.1.200…9.1