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VulnerabilityCVE-2026-73499Published 2026-08-12

CVE-2026-73499 — etcd-io etcd

high (derived)

As of 2026-08-12, CVE-2026-73499 is a High-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in etcd-io etcd, CVSS v4.0 7.1. No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-73499 as of 2026-08-12; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

CVSS v4.0
7.1/10High (derived)
EPSS
—No EPSS score yet
CISA KEV
NoNot in the KEV catalog
Tracked threats
0None linked yet
Priority
3.6/10Threadlinqs triage score
Published
CVSS v4.0 7.1 (High, derived from score) · Priority 3.6/10 · Published 2026-08-12

Last updated:

What is CVE-2026-73499?

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.

The record classifies CVE-2026-73499 under weakness class CWE-863. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 54 days ago.

Severity and exploitation probability

CVSS v4.0 base score
7.1 — High (derived from score)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
3.6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-08-12

Is CVE-2026-73499 being exploited?

It currently carries a trending score of 30 in the Threadlinqs vulnerability feed.

Affected products and versions

  • etcd-io: etcd

How to fix CVE-2026-73499

No vendor patch reference has been recorded for CVE-2026-73499 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-73499

No threat campaign in the Threadlinqs corpus currently references CVE-2026-73499, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

Sources

Enriched from CVE.org, NVD. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.

Vendor advisory and patch

Other references

Showing 6 of 8 recorded references.