Zero Day MonitorZDM
DashboardVulnerabilitiesTrendingZero-DaysNewsAbout
Login
ImpressumPrivacy Policy
Zero Day Monitor © 2026
4356 articles · 196343 vulns · 36/41 feeds (7d)
← Back to list
5.9
CVE-2026-56742
cilium · cilium

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.

Affected Products

VendorProductVersions
ciliumcilium< 1.17.17, >= 1.18.0, < 1.18.11, >= 1.19.0, < 1.19.5

References

  • https://github.com/cilium/cilium/security/advisories/GHSA-w7c2-w76w-5hmj(x_refsource_CONFIRM)
  • https://github.com/cilium/cilium/commit/7422068aff67ac77c7dcc57aa5b9240c91333deb(x_refsource_MISC)
  • https://github.com/cilium/cilium/commit/e0b1cef513ff910323f3743e9f3e3d86721e4857(x_refsource_MISC)
  • https://github.com/cilium/cilium/commit/f23929cff682d6ed0dc158070812cb302fc0032b(x_refsource_MISC)
  • https://github.com/cilium/cilium/commit/fd47963ea394d5e8fa4a88c40a79063430c512ca(x_refsource_MISC)
  • https://github.com/cilium/cilium/releases/tag/v1.17.17(x_refsource_MISC)
  • https://github.com/cilium/cilium/releases/tag/v1.18.11(x_refsource_MISC)
  • https://github.com/cilium/cilium/releases/tag/v1.19.5(x_refsource_MISC)

Related News (1 articles)

Tier C
VulDB39d ago
CVE-2026-56742 | Cilium up to 1.17.16/1.18.10/1.19.4 Gateway API permission
→ No new info (linked only)
CVSS 3.15.9 MEDIUM
VectorCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
CISA KEV❌ No
Actively exploited❌ No
CWECWE-862
PublishedJul 15, 2026
Last enriched39d agov2
Trending Score0
Source articles1
Independent1
Info Completeness8/14
Missing: epss, kev, exploit, patch, iocs, mitre_attack

Community Vote

0
Login to vote
0 upvotes0 downvotes
No votes yet

Related CVEs (5)

CRITICALCVE-2026-49445EXP
Cilium: Sensitive information disclosure and cluster disruption via local Envoy admin socket access
MEDIUMCVE-2026-56743
Cilium may unexpectedly allow ingress traffic from the local namespace when a Kubernetes NetworkPolicy is configured with an ipBlock match
CRITICALPRE-CVEEXP
Cilium ClusterNetworkPolicy matchExpressions Values Silently Dropped
LOWCVE-2026-10722
cilium ebpf LoadCollectionSpec/LoadCollectionSpecFromReader btf.go loadRawSpec integer overflow
MEDIUMCVE-2026-53935EXP
CiliumLocalRedirectPolicy addressMatcher allows cross-namespace service traffic hijacking and can break service translation

Pin to Dashboard

Verification

State: verified
Confidence: 0%

Vulnerability Timeline

CVE Published
Jul 15, 2026
Discovered by ZDM
Jul 15, 2026
Updated: affectedVersions
Jul 15, 2026

Version History

v2
Last enriched 39d ago
v2Tier C39d ago

Updated affected versions to include < 1.17.16, < 1.18.10, < 1.19.4 and changed severity to HIGH.

affectedVersions
via VulDB
v139d ago

Initial creation