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CVE-2026-26963

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Versions 1.18.0 through 1.18.5 will incorrectly permit traffic from Pods on other nodes when Native Routing, WireGuard and Node Encryption are enabled. This issue has been fixed in version 1.18.6.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:67dcd6191191b062785704a41c08f7b907312ec2227f564685d7c76913e5903c
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":">= 1.18.0, < 1.18.6"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ab1dc0ac057524f905233edbedd68ef343914b74138cc6c34b2cf3ce58c6c7af · sha256:9c397e0736c53705… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ab1dc0ac057524f905233edbedd68ef343914b74138cc6c34b2cf3ce58c6c7af · sha256:9c397e0736c53705… · /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_v5cwe
    urn:baitaphish:normalized-source-record:v2:ab1dc0ac057524f905233edbedd68ef343914b74138cc6c34b2cf3ce58c6c7af · sha256:9c397e0736c53705… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/cilium/cilium/commit/88e28e1e62c0b1a02c3f0fc22d888ac9eefbe885","tags":["x_refsource_MISC"],"url":"https://github.com/cilium/cilium/commit/88e28e1e62c0b1a02c3f0fc22d888ac9eefbe885"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ab1dc0ac057524f905233edbedd68ef343914b74138cc6c34b2cf3ce58c6c7af · sha256:9c397e0736c53705… · /containers/cna/references/2
{"name":"https://github.com/cilium/cilium/pull/42892","tags":["x_refsource_MISC"],"url":"https://github.com/cilium/cilium/pull/42892"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ab1dc0ac057524f905233edbedd68ef343914b74138cc6c34b2cf3ce58c6c7af · sha256:9c397e0736c53705… · /containers/cna/references/1
{"name":"https://github.com/cilium/cilium/releases/tag/v1.18.6","tags":["x_refsource_MISC"],"url":"https://github.com/cilium/cilium/releases/tag/v1.18.6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ab1dc0ac057524f905233edbedd68ef343914b74138cc6c34b2cf3ce58c6c7af · sha256:9c397e0736c53705… · /containers/cna/references/3
{"name":"https://github.com/cilium/cilium/security/advisories/GHSA-5r23-prx4-mqg3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/cilium/cilium/security/advisories/GHSA-5r23-prx4-mqg3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ab1dc0ac057524f905233edbedd68ef343914b74138cc6c34b2cf3ce58c6c7af · sha256:9c397e0736c53705… · /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.

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