TI-2024-28455 Aliases CVE-2024-42487 GHSA-qcm3-7879-xcww

Cilium's Gateway API route matching order contradicts specification

LOW 21CWE-113Published 2024-08-15 · Updated 2024-08-15

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00535 45th percentileScored 2026-11-07

Fix Fixed cilium (cilium): 1.15.8github.com/cilium/cilium (Go): 1.16.1, 1.15.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
cilium	cilium	= 1.16.0; 1.15.0 to before 1.15.8	1.15.8	Patch available	CNA
—	github.com/cilium/cilium (Go)	1.16.0 to before 1.16.1	1.16.1	Patch available	GHSA-qcm3-7879-xcww
—	github.com/cilium/cilium (Go)	1.15.0 to before 1.15.8	1.15.8	Patch available	GHSA-qcm3-7879-xcww

cilium Vendorcilium Affected = 1.16.0; 1.15.0 to before 1.15.8 Fixed in 1.15.8 Patch available CNA
github.com/cilium/cilium (Go) Vendor— Affected 1.16.0 to before 1.16.1 Fixed in 1.16.1 Patch available GHSA-qcm3-7879-xcww
github.com/cilium/cilium (Go) Vendor— Affected 1.15.0 to before 1.15.8 Fixed in 1.15.8 Patch available GHSA-qcm3-7879-xcww

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:cilium:cilium::::::::	1.15.0 to before 1.15.8	Vulnerable	cilium
cpe:2.3:a:cilium:cilium:1.16.0:::::::*	1.16.0	Vulnerable	cilium

cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:* Versions 1.15.0 to before 1.15.8 Vulnerable ·cilium
cpe:2.3:a:cilium:cilium:1.16.0:*:*:*:*:*:*:* Versions 1.16.0 Vulnerable ·cilium

Remediation

Fix · CNA cilium (cilium) Fixed in 1.15.8
Fix · GHSA-qcm3-7879-xcww github.com/cilium/cilium (Go) Fixed in 1.16.1 Advisory →
Fix · GHSA-qcm3-7879-xcww github.com/cilium/cilium (Go) Fixed in 1.15.8 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2024-42487
2026-10-03 Alias added: GHSA-qcm3-7879-xcww

References

Patch 2

Advisory 2

Other 3

TI-2024-32092 CIDR deny policies may not take effect when a more narrow CIDR allow is present CVSS 3.1HIGH 8.7
TI-2023-12305 Cilium eBPF filters may be temporarily removed during agent restart CVSS 3.1CRITICAL 9.8
TI-2023-20486 Cilium NetworkPolicy bypass via pod labels CVSS 3.1CRITICAL 9.0
TI-2022-11721 Incorrect Default Permissions in Cilium CVSS 3.1HIGH 8.8
TI-2026-36600 Cilium: Sensitive information disclosure and cluster disruption via local Envoy admin socket access CVSS 3.1CRITICAL 9.2
TI-2026-40915 Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces CVSS 3.1HIGH 8.9

See all 34 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences