Cilium may unexpectedly allow ingress traffic from the local namespace when a Kubernetes NetworkPolicy is configured with an ipBlock match

Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.

CVE-2026-56743 · CVE overview and exploitation status

EUVD-2026-44774

GHSA-fm8w-2m5w-9j7r

BIT-cilium-2026-56743

BIT-cilium-operator-2026-56743

BIT-hubble-relay-2026-56743

GO-2026-6367

cve-program · CVE-2026-56743

• https://github.com/cilium/cilium/security/advisories/GHSA-fm8w-2m5w-9j7r
• https://github.com/cilium/cilium/pull/46305
• https://github.com/cilium/cilium/pull/46456
• https://github.com/cilium/cilium/commit/1c84ae3b58a7cd54f7ee355e6c524c82f620eae8
• https://github.com/cilium/cilium/commit/bacea640404c0805c23515353dc1681c5bf35171
• https://github.com/cilium/cilium/releases/tag/v1.19.5

euvd · EUVD-2026-44774

• https://github.com/cilium/cilium/security/advisories/GHSA-fm8w-2m5w-9j7r
• https://github.com/cilium/cilium/pull/46305
• https://github.com/cilium/cilium/pull/46456
• https://github.com/cilium/cilium/commit/1c84ae3b58a7cd54f7ee355e6c524c82f620eae8
• https://github.com/cilium/cilium/commit/bacea640404c0805c23515353dc1681c5bf35171
• https://github.com/cilium/cilium/releases/tag/v1.19.5

nvd · CVE-2026-56743

• https://github.com/cilium/cilium/commit/1c84ae3b58a7cd54f7ee355e6c524c82f620eae8
• https://github.com/cilium/cilium/commit/bacea640404c0805c23515353dc1681c5bf35171
• https://github.com/cilium/cilium/pull/46305
• https://github.com/cilium/cilium/pull/46456
• https://github.com/cilium/cilium/releases/tag/v1.19.5
• https://github.com/cilium/cilium/security/advisories/GHSA-fm8w-2m5w-9j7r

osv · GHSA-fm8w-2m5w-9j7r

• https://github.com/cilium/cilium/security/advisories/GHSA-fm8w-2m5w-9j7r
• https://nvd.nist.gov/vuln/detail/CVE-2026-56743
• https://github.com/cilium/cilium/pull/46305
• https://github.com/cilium/cilium/pull/46456
• https://github.com/cilium/cilium/commit/1c84ae3b58a7cd54f7ee355e6c524c82f620eae8
• https://github.com/cilium/cilium/commit/bacea640404c0805c23515353dc1681c5bf35171
• https://github.com/cilium/cilium
• https://github.com/cilium/cilium/releases/tag/v1.19.5

osv · GO-2026-6367

• https://github.com/cilium/cilium/security/advisories/GHSA-fm8w-2m5w-9j7r
• https://nvd.nist.gov/vuln/detail/CVE-2026-56743
• https://github.com/cilium/cilium/commit/1c84ae3b58a7cd54f7ee355e6c524c82f620eae8
• https://github.com/cilium/cilium/commit/bacea640404c0805c23515353dc1681c5bf35171
• https://github.com/cilium/cilium/pull/46305
• https://github.com/cilium/cilium/pull/46456
• https://github.com/cilium/cilium/releases/tag/v1.19.5

No related changes are available here.