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…

PriorityP334medium6.9CVSS 3.1

AVAACLPRHUINSCCLINAH

EPSS

0.34%

27.6th percentile

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 addressMatcher, enabling hijacking traffic to Services in any namespace and bypassing namespace scoping enforced by serviceMatcher; deleting such a policy can also corrupt Cilium internal service state and stop service translation for the affected Service. This issue is fixed in versions 1.17.16, 1.18.10, and 1.19.4.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
cilium	cilium	< 1.17.16	1.17.16
cilium	cilium	—	—
cilium	cilium	—	—
github.com	cilium_cilium	>= 0 < 1.17.16	1.17.16
github.com	cilium_cilium	>= 1.18.2 < 1.18.10	1.18.10
github.com	cilium_cilium	>= 1.19.0 < 1.19.4	1.19.4

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