etcd having a negative value for cluster node size results in an index out-of-bound panic during service discoveryGHSA-9gp7-6833-wv89
GHSA-9gp7-6833-wv89 is a security vulnerability in go.etcd.io/etcd/client/v3. A fix is available for go.etcd.io/etcd/client/v3 — see the affected versions and patch details below.
Real-World Exposure
go.etcd.io/etcd/client/v3🐹go.etcd.io/etcd/client/v3Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
Vulnerability type
Data Validation
Detail
When an etcd instance attempts to perform service discovery, if a cluster size is provided as a negative value, the etcd instance will panic without recovery.
References
Find out more on this vulnerability in the security audit report
For more information
If you have any questions or comments about this advisory:
- Contact the etcd security committee
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | go.etcd.io/etcd/client/v3 | ≥ 3.4.0&&< 3.4.10 | 3.4.10go get go.etcd.io/etcd/client/v3@v3.4.10 |
| 🐹Go | go.etcd.io/etcd/client/v3 | all versions | 3.3.23go get go.etcd.io/etcd/client/v3@v3.3.23 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for go.etcd.io/etcd/client/v3, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update go.etcd.io/etcd/client/v3 to 3.4.10 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-9gp7-6833-wv89 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Frequently Asked Questions
Is GHSA-9gp7-6833-wv89 in your dependencies?
Find it across Go, including transitive dependencies.