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CVE-2026-56742

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-56742

Severity

5.9

Medium

CVSS V3

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Summary

Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces

Description

Cilium is a networking, observability, and security solution. Prior to 1.17.17, 1.18.11, and 1.19.5, Cilium clusters using Gateway API allow users with permissions to create or update namespaced HTTPRoutes to mirror HTTP traffic to any Service in any namespace, bypassing the ReferenceGrant authorization mechanism. Gateway API functionality is disabled by default. This issue is fixed in versions 1.17.17, 1.18.11, and 1.19.5.

References

Affected packages

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