{"id":"CVE-2026-15738","summary":"Cross-namespace traffic interception via incorrect route precedence ordering in AWS Load Balancer Controller","details":"Incorrect behavior order in the Gateway API listener-rule generation in Amazon AWS Load Balancer Controller before 3.4.2 might allow an authenticated remote user to intercept, spoof, or deny another namespace's gRPC traffic on a shared Gateway via a crafted HTTPRoute resource.\n\n\n\nTo mitigate this issue, users should upgrade to version 3.4.2.","modified":"2026-07-17T03:41:52.810110520Z","published":"2026-07-14T20:19:23.721Z","database_specific":{"cwe_ids":["CWE-653"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15738.json","cna_assigner":"AMZN"},"references":[{"type":"ADVISORY","url":"https://aws.amazon.com/security/security-bulletins/2026-055-aws/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15738.json"},{"type":"ADVISORY","url":"https://github.com/kubernetes-sigs/aws-load-balancer-controller/releases/tag/v3.4.2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-15738"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/kubernetes-sigs/aws-load-balancer-controller","events":[{"introduced":"0"},{"fixed":"22f6cd7fbfc3f3bdf14bfc41ef780510730b0cfe"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"3.4.2"}],"source":["AFFECTED_FIELD","DESCRIPTION","REFERENCES"]}}],"versions":["v3.2.2","v3.3.0","v3.1.0","v3.0.0","v3.4.1","v3.4.0","v2.14.1","v2.13.4","znixon/v2.12","v2.12.0","v2.11.0","v2.16.0","v2.15.0","v3.2.1","v3.2.0","v2.17.0","v2.14.0","v2.13.3","v2.13.2","zac-v2.13.1","v2.13.1","zac-tag-2","zac-tag","v2.13.0","v2.10.0","v2.9.0","v2.7.0","v2.6.0","v2.5.4","v2.5.3","v2.5.2","v2.5.1","v2.5.0","v2.4.6","v2.4.5","v2.4.4","v2.4.3","v2.4.1","v2.4.0","v2.3.1","v2.3.0","v2.2.1","v2.2.0","v2.1.3","v2.1.2","v2.1.1","v2.1.0","v2.0.1","v2.0.0","v2.0.0-rc5","v2.0.0-rc4","v2.0.0-rc3","v2.0.0-rc2","v2.0.0-rc1","v2.0.0-rc0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-15738.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H"}]}