CVE Explorer
CVE-2026-56743
Cilium is a networking, observability, and security solution. From 1.19.0 to 1.19.4, standard Kubernetes NetworkPolicy specifications using CIDR-based ipBlock rules without pod or namespace selectors erroneously generate a wildcard namespace allow rule when Cilium is configured with a custom clusterName rather than the default any value. The parser incorrectly instantiates a pod selector on selectorless peer definitions, allowing traffic from other workloads in the same namespace as the subject
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"cilium","vendor":"cilium","versions":[{"status":"affected","version":">= 1.19.0, < 1.19.5"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:1e38c93f206f953e71ab1fa7868c357f46bbdc78b664b22aaa0be155d9a48c94 · sha256:b24647e5afe21d2e… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:1e38c93f206f953e71ab1fa7868c357f46bbdc78b664b22aaa0be155d9a48c94 · sha256:b24647e5afe21d2e… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-863","description":"CWE-863: Incorrect Authorization","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:1e38c93f206f953e71ab1fa7868c357f46bbdc78b664b22aaa0be155d9a48c94 · sha256:b24647e5afe21d2e… · /containers/cna/problemTypes/0/descriptions/0
Source references
6 source assertions{"name":"https://github.com/cilium/cilium/commit/1c84ae3b58a7cd54f7ee355e6c524c82f620eae8","tags":["x_refsource_MISC"],"url":"https://github.com/cilium/cilium/commit/1c84ae3b58a7cd54f7ee355e6c524c82f620eae8"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:1e38c93f206f953e71ab1fa7868c357f46bbdc78b664b22aaa0be155d9a48c94 · sha256:b24647e5afe21d2e… · /containers/cna/references/3
{"name":"https://github.com/cilium/cilium/commit/bacea640404c0805c23515353dc1681c5bf35171","tags":["x_refsource_MISC"],"url":"https://github.com/cilium/cilium/commit/bacea640404c0805c23515353dc1681c5bf35171"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:1e38c93f206f953e71ab1fa7868c357f46bbdc78b664b22aaa0be155d9a48c94 · sha256:b24647e5afe21d2e… · /containers/cna/references/4
{"name":"https://github.com/cilium/cilium/pull/46305","tags":["x_refsource_MISC"],"url":"https://github.com/cilium/cilium/pull/46305"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:1e38c93f206f953e71ab1fa7868c357f46bbdc78b664b22aaa0be155d9a48c94 · sha256:b24647e5afe21d2e… · /containers/cna/references/1
{"name":"https://github.com/cilium/cilium/pull/46456","tags":["x_refsource_MISC"],"url":"https://github.com/cilium/cilium/pull/46456"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:1e38c93f206f953e71ab1fa7868c357f46bbdc78b664b22aaa0be155d9a48c94 · sha256:b24647e5afe21d2e… · /containers/cna/references/2
{"name":"https://github.com/cilium/cilium/releases/tag/v1.19.5","tags":["x_refsource_MISC"],"url":"https://github.com/cilium/cilium/releases/tag/v1.19.5"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:1e38c93f206f953e71ab1fa7868c357f46bbdc78b664b22aaa0be155d9a48c94 · sha256:b24647e5afe21d2e… · /containers/cna/references/5
{"name":"https://github.com/cilium/cilium/security/advisories/GHSA-fm8w-2m5w-9j7r","tags":["x_refsource_CONFIRM"],"url":"https://github.com/cilium/cilium/security/advisories/GHSA-fm8w-2m5w-9j7r"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:1e38c93f206f953e71ab1fa7868c357f46bbdc78b664b22aaa0be155d9a48c94 · sha256:b24647e5afe21d2e… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.