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Fencer Vulns
medium 5.4

CVE-2024-42486 json

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

published 2024-08-16 2 y ago modified 2026-09-10 1 mo ago also BIT-cilium-2024-42486 , BIT-cilium-operator-2024-42486 , BIT-hubble-relay-2024-42486 , EUVD-2024-2669 , GHSA-vwf8-q6fw-4wcm , GO-2024-3074

cvss
5.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

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.

Patch / fix

  • go github.com/cilium/cilium 1.15.8, 1.16.1
  • bitnami cilium 1.16.1
  • bitnami cilium-operator 1.16.1
  • bitnami hubble-relay 1.16.1
  • cilium cilium 1.15.8, 1.16.1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
GitHub 3.1 5.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
NVD 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
OSV 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
go github.com/cilium/cilium
>=1.16.0, <1.16.1
>=1.15.0, <1.15.8
1.16.1
1.15.8
bitnami cilium
>=1.15.0, <1.16.1
1.16.1
bitnami cilium-operator
>=1.15.4, <1.16.1
1.16.1
bitnami hubble-relay
>=1.15.0, <1.16.1
1.16.1

Affected products

  • cilium cilium

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.