Back
CVE-2021-3121An issue was discovered in GoGo Protobuf before 1.3.2. plugin/unmarshal/unmarshal.go lacks certain index validation, aka the "skippy…
- 8.6HighCVSS base score
- 3.4%Exploitation in 30 daysEPSS · top 11% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By mitre
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H |
- EPSS (exploitation in 30 days)
- 3.4% · top 11% of all CVEs (14 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.6.
Affected products
n/a
- affected n/a
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/gogo/protobufGHSA-c3h9-896r-86jm (opens in a new tab)
References
References7
- https://github.com/gogo/protobuf/commit/b03c65ea87cdc3521ede29f62fe3ce239267c1bc (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/gogo/protobuf/compare/v1.3.1...v1.3.2 (opens in a new tab)x_refsource_MISCx_transferred
- [pulsar-commits] 20210121 [GitHub] [pulsar-client-go] hrsakai opened a new pull request #446: Upgrade gogo/protobuf to 1.3.2 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [pulsar-commits] 20210122 [GitHub] [pulsar-client-go] hrsakai opened a new pull request #446: Upgrade gogo/protobuf to 1.3.2 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://security.netapp.com/advisory/ntap-20210219-0006/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://discuss.hashicorp.com/t/hcsec-2021-23-consul-exposed-to-denial-of-service-in-gogo-protobuf-dependency/29025 (opens in a new tab)x_refsource_MISCx_transferred
- [skywalking-notifications] 20211018 [GitHub] [skywalking-swck] hanahmily opened a new pull request #37: Fix vulnerabilities (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2022-1401 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-c3h9-896r-86jm (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-3121)Record last updated .