---
id: CVE-2026-73499
title: etcd is a distributed key-value store for the data of a distributed system
summary: >-
  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
  recei…
severity: high
cwe:
  - CWE-863
vendor: etcd
product: go.etcd.io/etcd/v3
affected:
  - 'go.etcd.io/etcd/v3 >= 3.7.0-alpha.0, < 3.7.1'
  - 'go.etcd.io/etcd/v3 >= 3.6.0, < 3.6.14'
  - go.etcd.io/etcd/v3 < 3.5.33
patched:
  - go.etcd.io/etcd/v3 3.7.1
  - go.etcd.io/etcd/v3 3.6.14
  - go.etcd.io/etcd/v3 3.5.33
published: '2026-08-12'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T20:05:53.723'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73499'
references:
  - url: >-
      https://github.com/etcd-io/etcd/commit/6643f80602461a6095c9b294b6512fd9719bef41
    label: security-advisories@github.com
  - url: >-
      https://github.com/etcd-io/etcd/commit/7cf71ec9e2ec54230a5454392fa4ffd4574b41ed
    label: security-advisories@github.com
  - url: >-
      https://github.com/etcd-io/etcd/commit/afeaa624da19085b47fb5ccc7c22a8c421bc2eae
    label: security-advisories@github.com
  - url: >-
      https://github.com/etcd-io/etcd/commit/e863b001bbf3367003a543aa3099db9892134cd7
    label: security-advisories@github.com
  - url: 'https://github.com/etcd-io/etcd/releases/tag/v3.5.33'
    label: security-advisories@github.com
  - url: 'https://github.com/etcd-io/etcd/releases/tag/v3.6.14'
    label: security-advisories@github.com
  - url: 'https://github.com/etcd-io/etcd/releases/tag/v3.7.1'
    label: security-advisories@github.com
  - url: 'https://github.com/etcd-io/etcd/security/advisories/GHSA-xg4h-6gfc-h4m8'
    label: security-advisories@github.com
  - url: 'https://github.com/etcd-io/etcd'
tags:
  - nvd
  - osv
  - go
epss: 0.00663
epssPercentile: 0.49502
aliases:
  - GHSA-xg4h-6gfc-h4m8
ecosystem: go
ingestedAt: '2026-08-13T19:18:21.612Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-73499)

Affected packages:

- `go.etcd.io/etcd/v3 >= 3.7.0-alpha.0, < 3.7.1`
- `go.etcd.io/etcd/v3 >= 3.6.0, < 3.6.14`
- `go.etcd.io/etcd/v3 < 3.5.33`

Patched in:

- `go.etcd.io/etcd/v3 3.7.1`
- `go.etcd.io/etcd/v3 3.6.14`
- `go.etcd.io/etcd/v3 3.5.33`

Source: https://osv.dev/vulnerability/GHSA-xg4h-6gfc-h4m8