Improper Authorization in etcd - CVE-2026-73499
Published: July 24, 2026 / Updated: August 13, 2026
Vulnerability identifier: #VU139352
CSH Severity: Low
CVSS v4: 7.1 [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]
CVE-ID: CVE-2026-73499
CWE-ID: CWE-285
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper access control in the Watch gRPC API when processing open-ended range watch requests with clientv3.WithFromKey(). A remote user can send a specially crafted watch request to disclose sensitive information.
Only clusters with authentication enabled are vulnerable. Range/Get and DeleteRange requests are not affected.
Affected software
etcd
How to mitigate CVE-2026-73499
Install security update from vendor's website.
etcd - addressed in versions 3.5.33, 3.6.14, 3.7.1