# etcd vulnerable to TOCTOU of gateway endpoint authentication

Source: https://junglewise.ai/threats/etcd-vulnerable-to-toctou-of-gateway-endpoint-authentication-d7b0e5fb  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-10-06  
License: CC BY 4.0 with a link back

Severity: info · Published 2022-10-06

etcd vulnerable to TOCTOU of gateway endpoint authentication

Technologies: [go.etcd.io/etcd/v3 (Go)](https://junglewise.ai/threats/technologies/go-etcd-io-etcd-v3). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Informational severity, published 6 October 2022.

**Which products and versions are affected?** go.etcd.io/etcd/v3 (Go) SEMVER:introduced=3.4.0,fixed=3.4.10.

**Is there a fix for This vulnerability?** Yes. go.etcd.io/etcd/v3 (Go): upgrade to 3.4.10 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected?** Check whether you run go.etcd.io/etcd/v3 (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- go.etcd.io/etcd/v3 (Go): upgrade to 3.4.10 or later

  ```sh
  go get go.etcd.io/etcd/v3@v3.4.10
  ```


## Affected products

- go.etcd.io/etcd/v3 (Go) SEMVER:introduced=3.4.0,fixed=3.4.10

## Related threats

- [etcd TLS listener denial of service via connection exhaustion](https://junglewise.ai/threats/cve-2026-73500-etcd-tls-listener-denial-of-service-via-connection-exhaustion)
- [etcd authorization bypass in Watch gRPC API](https://junglewise.ai/threats/cve-2026-73499-etcd-authorization-bypass-in-watch-grpc-api)
- [etcd RBAC authorization bypass in transaction operations](https://junglewise.ai/threats/cve-2026-44283-etcd-rbac-authorization-bypass-in-transaction-operations)
- [GO-2026-4808 - Nested etcd transactions bypass RBAC authorization checks in go.etcd.io/etcd](https://junglewise.ai/threats/cve-2026-33343-etcd-nested-etcd-transactions-bypass-rbac-authorization-checks)
- [GO-2026-4806 - Authorization bypasses in multiple APIs in go.etcd.io/etcd](https://junglewise.ai/threats/cve-2026-33413-etcd-authorization-bypasses-in-multiple-apis)