{"id":"CVE-2026-12538","aliases":["EUVD-2026-117072","GHSA-mp2j-4j6c-q69j"],"status":"published","title":"IBM MQ Appliance is affected by an improper validation vulnerability","description":"IBM MQ 9.4.0.0 to 9.4.0.26, 9.4.1.0 to 9.4.5.3, and 10.0.0.1 to 10.0.0.5 could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message header structure length fields.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00333,"percentile":0.26879,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-124"],"published":"2026-11-04T20:25:41Z","modified":"2026-11-04T21:32:40Z","products":[{"vendor":"ibm","product":"mq appliance"}],"references":[{"url":"https://www.ibm.com/support/pages/node/7293035","tags":["vendor-advisory","patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-12538"},{"url":"https://github.com/advisories/GHSA-mp2j-4j6c-q69j"}],"sources":{"cve":[{"id":"CVE-2026-12538","title":"IBM MQ Appliance is affected by an improper validation vulnerability","description":"IBM MQ 9.4.0.0 to 9.4.0.26, 9.4.1.0 to 9.4.5.3, and 10.0.0.1 to 10.0.0.5 could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message header structure length fields.","status":"published","published":"2026-11-04T20:25:41.49Z","modified":"2026-11-09T20:52:50.449Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-124"],"updated_at":"2026-11-09T21:34:55.566109Z"}],"euvd":[{"id":"EUVD-2026-117072","description":"IBM MQ 9.4.0.0 to 9.4.0.26, 9.4.1.0 to 9.4.5.3, and 10.0.0.1 to 10.0.0.5 could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message header structure length fields.","status":"published","published":"2026-11-04T20:25:41Z","modified":"2026-11-09T20:52:50Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L","level":"medium"}],"updated_at":"2026-11-09T22:18:21.971974Z"}],"ghsa":[{"id":"GHSA-mp2j-4j6c-q69j","title":"IBM MQ 9.4.0.0 to 9.4.0.26, 9.4.1.0 to 9.4.5.3, and 10.0.0.1 to 10.0.0.5 could allow an...","description":"IBM MQ 9.4.0.0 to 9.4.0.26, 9.4.1.0 to 9.4.5.3, and 10.0.0.1 to 10.0.0.5 could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message header structure length fields.","status":"published","published":"2026-11-04T21:32:33Z","modified":"2026-11-04T21:32:40Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L","level":"medium"}],"cwes":["CWE-124"],"updated_at":"2026-11-04T21:42:46.194147Z"}],"nvd":[{"id":"CVE-2026-12538","description":"IBM MQ 9.4.0.0 to 9.4.0.26, 9.4.1.0 to 9.4.5.3, and 10.0.0.1 to 10.0.0.5 could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message header structure length fields.","status":"published","published":"2026-11-04T21:18:11.44Z","modified":"2026-11-09T22:18:47.557Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L","level":"medium","assessor":"secondary"}],"cwes":["CWE-124"],"updated_at":"2026-11-09T23:16:04.854042Z"}]}}