What’s Vulnerable › Vulnerabilities

CVE-2024-42487: Cilium's Gateway API route matching order contradicts specification

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-08-15 · updated 2026-06-17
• Weakness: CWE-113

Description

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. In the 1.15 branch prior to 1.15.8 and the 1.16 branch prior to 1.16.1, Gateway API HTTPRoutes and GRPCRoutes do not follow the match precedence specified in the Gateway API specification. In particular, request headers are matched before request methods, when the specification describes that the request methods must be respected before headers are matched. This could result in unexpected behaviour with security This issue is fixed in Cilium v1.15.8 and v1.16.1. There is no workaround for this issue.

Affected products

• cilium: from 1.15.0 before 1.15.8; 1.16.0 — fixed in 1.15.8

How to fix

Upgrade to a fixed version: cilium 1.15.8. Check the vendor advisory for mitigations.

References

• https://github.com/cilium/cilium/commit/a3510fe4a92305822aa1a5e08cb6d6c873c8699a
• https://github.com/cilium/cilium/pull/34109
• https://github.com/cilium/cilium/security/advisories/GHSA-qcm3-7879-xcww

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