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Advisory record · GHSA-c3h9-896r-86jm

Improper Input Validation in GoGo Protobuf

CVSS 8.6 HighEPSS 0.034 · 89th percentile

Published by the GitHub Advisory Database at 28 Mar 2022, 20:28 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/gogo/protobufGo<1.3.21.3.2
Identifiers
GHSA-c3h9-896r-86jm · BIT-consul-2021-3121 · BIT-protobuf-2021-3121 · CVE-2021-3121 · GO-2021-0053
Weakness (CWE)
CWE-20 · CWE-129
Tags
Published
28 Mar 2022
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

GoGo Protobuf (github.com/gogo/protobuf) versions before 1.3.2 are affected by a missing index validation flaw in the unmarshal plugin. The source gives few details about what an attacker must do or what exactly results from exploitation. Upgrade to version 1.3.2 or later, where the issue is fixed.

Written 6 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.6 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.034, the 89th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:44 UTC First seen by agentprime
  2. 31 Oct 2026, 14:44 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.