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TI-2024-28454 Aliases CVE-2024-42486GHSA-vwf8-q6fw-4wcm

Cilium vulnerable to information leakage via incorrect ReferenceGrant update logic in Gateway API

Priority LOW 32CWE-200Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-200.

Summary

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. In versions on the 1.15.x branch prior to 1.15.8 and the 1.16.x branch prior to 1.16.1, ReferenceGrant changes are not correctly propagated in Cilium's GatewayAPI controller, which could lead to Gateway resources being able to access secrets for longer than intended, or to Routes having the ability to forward traffic to backends in other namespaces for longer than intended. This issue has been patched in Cilium v1.15.8 and v1.16.1. As a workaround, any modification of a related Gateway/HTTPRoute/GRPCRoute/TCPRoute CRD (for example, adding any label to any of these resources) will trigger a reconciliation of ReferenceGrants on an affected cluster.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00573 47th 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

VendorProductAffected versionsFixed inStatusSource
ciliumcilium= 1.16.0; 1.15.0 to before 1.15.81.15.8Patch availableCNA
—github.com/cilium/cilium (Go)1.16.0 to before 1.16.11.16.1Patch availableGHSA-vwf8-q6fw-4wcm
—github.com/cilium/cilium (Go)1.15.0 to before 1.15.81.15.8Patch availableGHSA-vwf8-q6fw-4wcm
  • 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-vwf8-q6fw-4wcm
  • github.com/cilium/cilium (Go) Vendor— Affected 1.15.0 to before 1.15.8 Fixed in 1.15.8 Patch available GHSA-vwf8-q6fw-4wcm

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*1.15.0 – 1.15.8Vulnerablecilium
cpe:2.3:a:cilium:cilium:1.16.0:*:*:*:*:*:*:*1.16.0Vulnerablecilium
  • cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:* Versions 1.15.0 – 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-vwf8-q6fw-4wcm github.com/cilium/cilium (Go) Fixed in 1.16.1 Advisory →
  • Fix · GHSA-vwf8-q6fw-4wcm github.com/cilium/cilium (Go) Fixed in 1.15.8 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-42486
  2. 2026-10-03 Alias added: GHSA-vwf8-q6fw-4wcm

References

Patch 3

Advisory 1

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