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CVE-2026-56742

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:0205a534b04961738c8b2cd75237ed42a2fe885c39b69ccd33445e6a7402bf7c
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":"< 1.17.17"},{"status":"affected","version":">= 1.18.0, < 1.18.11"},{"status":"affected","version":">= 1.19.0, < 1.19.5"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e8ee522d0a0ef15fd649898e050b1cc14d123542bfe6727763944bc80baf663f · sha256:d0ecf8350099d349… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"LOW","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"HIGH","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e8ee522d0a0ef15fd649898e050b1cc14d123542bfe6727763944bc80baf663f · sha256:d0ecf8350099d349… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e8ee522d0a0ef15fd649898e050b1cc14d123542bfe6727763944bc80baf663f · sha256:d0ecf8350099d349… · /containers/cna/problemTypes/0/descriptions/0

Source references

8 source assertions
{"name":"https://github.com/cilium/cilium/commit/7422068aff67ac77c7dcc57aa5b9240c91333deb","tags":["x_refsource_MISC"],"url":"https://github.com/cilium/cilium/commit/7422068aff67ac77c7dcc57aa5b9240c91333deb"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8ee522d0a0ef15fd649898e050b1cc14d123542bfe6727763944bc80baf663f · sha256:d0ecf8350099d349… · /containers/cna/references/1
{"name":"https://github.com/cilium/cilium/commit/e0b1cef513ff910323f3743e9f3e3d86721e4857","tags":["x_refsource_MISC"],"url":"https://github.com/cilium/cilium/commit/e0b1cef513ff910323f3743e9f3e3d86721e4857"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8ee522d0a0ef15fd649898e050b1cc14d123542bfe6727763944bc80baf663f · sha256:d0ecf8350099d349… · /containers/cna/references/2
{"name":"https://github.com/cilium/cilium/commit/f23929cff682d6ed0dc158070812cb302fc0032b","tags":["x_refsource_MISC"],"url":"https://github.com/cilium/cilium/commit/f23929cff682d6ed0dc158070812cb302fc0032b"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8ee522d0a0ef15fd649898e050b1cc14d123542bfe6727763944bc80baf663f · sha256:d0ecf8350099d349… · /containers/cna/references/3
{"name":"https://github.com/cilium/cilium/commit/fd47963ea394d5e8fa4a88c40a79063430c512ca","tags":["x_refsource_MISC"],"url":"https://github.com/cilium/cilium/commit/fd47963ea394d5e8fa4a88c40a79063430c512ca"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8ee522d0a0ef15fd649898e050b1cc14d123542bfe6727763944bc80baf663f · sha256:d0ecf8350099d349… · /containers/cna/references/4
{"name":"https://github.com/cilium/cilium/releases/tag/v1.17.17","tags":["x_refsource_MISC"],"url":"https://github.com/cilium/cilium/releases/tag/v1.17.17"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8ee522d0a0ef15fd649898e050b1cc14d123542bfe6727763944bc80baf663f · sha256:d0ecf8350099d349… · /containers/cna/references/5
{"name":"https://github.com/cilium/cilium/releases/tag/v1.18.11","tags":["x_refsource_MISC"],"url":"https://github.com/cilium/cilium/releases/tag/v1.18.11"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8ee522d0a0ef15fd649898e050b1cc14d123542bfe6727763944bc80baf663f · sha256:d0ecf8350099d349… · /containers/cna/references/6
{"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_v5reference
    urn:baitaphish:normalized-source-record:v2:e8ee522d0a0ef15fd649898e050b1cc14d123542bfe6727763944bc80baf663f · sha256:d0ecf8350099d349… · /containers/cna/references/7
{"name":"https://github.com/cilium/cilium/security/advisories/GHSA-w7c2-w76w-5hmj","tags":["x_refsource_CONFIRM"],"url":"https://github.com/cilium/cilium/security/advisories/GHSA-w7c2-w76w-5hmj"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8ee522d0a0ef15fd649898e050b1cc14d123542bfe6727763944bc80baf663f · sha256:d0ecf8350099d349… · /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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