vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-73499

etcd: Watch API authorization bypass via open-ended range requests

HIGH
7.1
CVSS Score
Published: August 12, 2026 at 09:20 PM UTC
Updated: October 24, 2026 at 03:10 PM UTC
1 product affected across 1 vendorEtcd

Using etcd by etcd-io?

Get instant alerts when new vulnerabilities affect etcd - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
HIGH7.1
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Etcd· Etcd Io
90%
v < 3.5.33>= 3.6.0, < 3.6.14>= 3.7.0-alpha.0, < 3.7.1
Affected range stops below 3.5.33, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.6.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.7.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (8)

x_refsource_CONFIRM
Source: cverecord
https://github.com/etcd-io/etcd/security/advisories/GHSA-xg4h-6gfc-h4m8
x_refsource_MISC
Source: cverecord
https://github.com/etcd-io/etcd/commit/6643f80602461a6095c9b294b6512fd9719bef41
x_refsource_MISC
Source: cverecord
https://github.com/etcd-io/etcd/commit/7cf71ec9e2ec54230a5454392fa4ffd4574b41ed
x_refsource_MISC
Source: cverecord
https://github.com/etcd-io/etcd/commit/afeaa624da19085b47fb5ccc7c22a8c421bc2eae
x_refsource_MISC
Source: cverecord
https://github.com/etcd-io/etcd/commit/e863b001bbf3367003a543aa3099db9892134cd7
x_refsource_MISC
Source: cverecord
https://github.com/etcd-io/etcd/releases/tag/v3.5.33
x_refsource_MISC
Source: cverecord
https://github.com/etcd-io/etcd/releases/tag/v3.6.14
x_refsource_MISC
Source: cverecord
https://github.com/etcd-io/etcd/releases/tag/v3.7.1

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.1HIGHGitHub_M
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-863

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card