Auth bypass in Cilium
CVE-2026-53935
Cilium is a networking, observability, and security solution. Prior to 1.17.16, from 1.18.2 to 1.18.9, and from 1.19.0 to 1.19.3, users with the ability to create CiliumLocalRedirectPolicies can specify arbitrary ClusterIPs via addressMatc…
Vulnerability class: Broken Access Control
CVSS v3 metric
CVSS v3 base score 6.9 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:H.
Affected products
- Cilium — versions < 1.17.16, >= 1.18.2, < 1.18.10, >= 1.19.0, < 1.19.4
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-53935?
- CVE-2026-53935 is a medium-severity vulnerability in Cilium, classified under Incorrect Authorization. CVSS score: 6.9/10. Published 2026-07-07.
- How severe is CVE-2026-53935?
- Medium severity. CVSS v3 base score is 6.9 out of 10.