{"id":"CVE-2026-0543","aliases":["BIT-elk-2026-0543","BIT-kibana-2026-0543","EUVD-2026-2035","GHSA-p2g6-3qpg-4v6h"],"status":"published","title":"Improper Input Validation in Kibana Email Connector Leading to Excessive Allocation","description":"Improper Input Validation (CWE-20) in Kibana's Email Connector can allow an attacker to cause an Excessive Allocation (CAPEC-130) through a specially crafted email address parameter. This requires an attacker to have authenticated access with view-level privileges sufficient to execute connector actions. The application attempts to process specially crafted email format, resulting in complete service unavailability for all users until manual restart is performed.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00431,"percentile":0.37681,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20","CWE-770"],"published":"2026-01-13T21:10:38Z","modified":"2026-10-28T10:50:52Z","fixes":[{"ecosystem":"Bitnami","package":"elk","fixed_in":["8.19.10","9.1.10","9.2.4"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"kibana","fixed_in":["8.19.10","9.1.10","9.2.4"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"elk","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"8.19.10"},{"introduced":"9.0.0"},{"fixed":"9.1.10"},{"introduced":"9.2.0"},{"fixed":"9.2.4"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"kibana","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"8.19.10"},{"introduced":"9.0.0"},{"fixed":"9.1.10"},{"introduced":"9.2.0"},{"fixed":"9.2.4"}]}]}],"products":[{"vendor":"elastic","product":"kibana"}],"references":[{"url":"https://discuss.elastic.co/t/kibana-8-19-10-9-1-10-9-2-4-security-update-esa-2026-08/384523","tags":["Vendor Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-0543","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-p2g6-3qpg-4v6h"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/0xxx/CVE-2026-0543.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-0543","title":"Improper Input Validation in Kibana Email Connector Leading to Excessive Allocation","description":"Improper Input Validation (CWE-20) in Kibana's Email Connector can allow an attacker to cause an Excessive Allocation (CAPEC-130) through a specially crafted email address parameter. This requires an attacker to have authenticated access with view-level privileges sufficient to execute connector actions. The application attempts to process specially crafted email format, resulting in complete service unavailability for all users until manual restart is performed.","status":"published","published":"2026-01-13T21:10:38.663Z","modified":"2026-01-13T21:25:59.853Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:20:13.962274Z"}],"euvd":[{"id":"EUVD-2026-2035","description":"Improper Input Validation (CWE-20) in Kibana's Email Connector can allow an attacker to cause an Excessive Allocation (CAPEC-130) through a specially crafted email address parameter. This requires an attacker to have authenticated access with view-level privileges sufficient to execute connector actions. The application attempts to process specially crafted email format, resulting in complete service unavailability for all users until manual restart is performed.","status":"published","published":"2026-01-13T21:10:38Z","modified":"2026-01-13T21:25:59Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T19:48:52.227329Z"}],"ghsa":[{"id":"GHSA-p2g6-3qpg-4v6h","title":"Improper Input Validation (CWE-20) in Kibana's Email Connector can allow an attacker to cause an...","description":"Improper Input Validation (CWE-20) in Kibana's Email Connector can allow an attacker to cause an Excessive Allocation (CAPEC-130) through a specially crafted email address parameter. This requires an attacker to have authenticated access with view-level privileges sufficient to execute connector actions. The application attempts to process specially crafted email format, resulting in complete service unavailability for all users until manual restart is performed.","status":"published","published":"2026-01-13T21:31:46Z","modified":"2026-01-22T21:33:45Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-20","CWE-770"],"updated_at":"2026-11-02T15:05:51.858942Z"}],"nvd":[{"id":"CVE-2026-0543","description":"Improper Input Validation (CWE-20) in Kibana's Email Connector can allow an attacker to cause an Excessive Allocation (CAPEC-130) through a specially crafted email address parameter. This requires an attacker to have authenticated access with view-level privileges sufficient to execute connector actions. The application attempts to process specially crafted email format, resulting in complete service unavailability for all users until manual restart is performed.","status":"published","published":"2026-01-13T21:15:51.17Z","modified":"2026-06-17T10:10:55.16Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-20","CWE-770"],"updated_at":"2026-11-02T14:12:04.066712Z"}],"osv":[{"id":"CVE-2026-0543","title":"Improper Input Validation in Kibana Email Connector Leading to Excessive Allocation","description":"Improper Input Validation (CWE-20) in Kibana's Email Connector can allow an attacker to cause an Excessive Allocation (CAPEC-130) through a specially crafted email address parameter. This requires an attacker to have authenticated access with view-level privileges sufficient to execute connector actions. The application attempts to process specially crafted email format, resulting in complete service unavailability for all users until manual restart is performed.","status":"published","published":"2026-01-13T21:10:38.663Z","modified":"2026-10-28T10:50:52.947953773Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:44:53.490346Z"},{"id":"BIT-elk-2026-0543","title":"Improper Input Validation in Kibana Email Connector Leading to Excessive Allocation","description":"Improper Input Validation (CWE-20) in Kibana's Email Connector can allow an attacker to cause an Excessive Allocation (CAPEC-130) through a specially crafted email address parameter. This requires an attacker to have authenticated access with view-level privileges sufficient to execute connector actions. The application attempts to process specially crafted email format, resulting in complete service unavailability for all users until manual restart is performed.","status":"published","published":"2026-01-16T08:39:07.127Z","modified":"2026-09-08T08:47:19.223263455Z","updated_at":"2026-11-02T15:28:29.563843Z"},{"id":"BIT-kibana-2026-0543","title":"Improper Input Validation in Kibana Email Connector Leading to Excessive Allocation","description":"Improper Input Validation (CWE-20) in Kibana's Email Connector can allow an attacker to cause an Excessive Allocation (CAPEC-130) through a specially crafted email address parameter. This requires an attacker to have authenticated access with view-level privileges sufficient to execute connector actions. The application attempts to process specially crafted email format, resulting in complete service unavailability for all users until manual restart is performed.","status":"published","published":"2026-01-16T08:42:18.049Z","modified":"2026-09-08T08:48:07.667757207Z","updated_at":"2026-11-02T15:28:32.162822Z"}]}}