Answer in brief
CVE-2026-73499 records a High severity (CVSS 7.1) vulnerability in etcd: Watch API authorization bypass via open-ended range requests. The current sources do not mark it as known exploited. The current feed maps etcd-io/etcd (generic), go.etcd.io/etcd/server/v3 (go), go.etcd.io/etcd/v3 (go), go.etcd.io/etcd/v3 (go) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps etcd-io/etcd (generic), go.etcd.io/etcd/server/v3 (go), go.etcd.io/etcd/v3 (go), go.etcd.io/etcd/v3 (go) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| etcd-io/etcdgeneric | <3.5.33 || >=3.6.0 <3.6.14 || >=3.7.0-alpha.0 <3.7.1 | 3.5.33, 3.6.14, 3.7.1 |
| go.etcd.io/etcd/server/v3go | >=0 <3.5.33 >=3.6.0 <3.6.14 >=3.7.0-alpha.0 <3.7.1 | 3.5.33, 3.6.14, 3.7.1 |
| go.etcd.io/etcd/v3go | >=3.7.0-alpha.0 <3.7.1 | 3.7.1 |
| go.etcd.io/etcd/v3go | >=3.6.0 <3.6.14 | 3.6.14 |
| go.etcd.io/etcd/v3go | >=0 <3.5.33 | 3.5.33 |
| go.etcd.io/etcd/v3go | >=3.7.0-alpha.0,<3.7.1 | 3.7.1 |
| go.etcd.io/etcd/v3go | >=3.6.0,<3.6.14 | 3.6.14 |
| go.etcd.io/etcd/v3go | <3.5.33 | 3.5.33 |
Published upstream
Aug 12, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 8, 2026
etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a user granted READ permission on a single exact key can use the Watch gRPC API with clientv3.WithFromKey() to receive watch events for every key lexicographically greater than or equal to the permitted key. In server/etcdserver/api/v3rpc/watch.go, the open-ended RangeEnd sentinel is rewritten before the RBAC permission check in server/auth/range_perm_cache.go function isRangeOpPermitted, causing the request to be treated as an exact-key watch. Range/Get and DeleteRange requests are not affected, and the issue affects only clusters with authentication enabled. This issue is fixed in versions 3.5.33, 3.6.14, and 3.7.1.
Quoted source text, attributed separately from HOL analysis.