{"id":"CVE-2026-101609","kind":"vulnerability","aliases":["CVE-2026-101609"],"related":[],"title":"MySQL Server: InnoDB flaw lets a privileged user crash the database","description":"Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: InnoDB).  Supported versions that are affected are MySQL Server: 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3 and  26.7.0-26.7.1. Difficult to exploit vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster.  Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 4.4 (Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H).","summary":"A flaw in the InnoDB storage engine of MySQL Server and MySQL Cluster can be triggered over the network by a highly privileged account to hang or repeatedly crash the server. The impact is limited to availability; the sources report no data disclosure or code execution.","severity":"medium","cvss":4.4,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["database","mysql","package","self-hosted"],"not_affected_if":["default-config"],"how_to_check":"- Run `SELECT VERSION();` on the server and compare against the affected ranges: MySQL Server 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1\n- Check whether the server is a MySQL Cluster deployment (NDB) as well as a plain MySQL Server","fix":"- Move MySQL Server or MySQL Cluster to a release outside the affected ranges, using the fixed version from Oracle's advisory (unknown in the sources)\n- Until patched, restrict which accounts hold high privileges and limit network exposure of the database port","status":"open","published_at":"2026-10-20T22:18:14+00:00","first_seen_at":"2026-10-23T21:57:22+00:00","triaged_at":"2026-10-25T04:37:07+00:00","updated_at":"2026-10-25T04:37:07+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-25T04:37:07Z","model":"claude-haiku-5-5","output":{"fix":"- Move MySQL Server or MySQL Cluster to a release outside the affected ranges, using the fixed version from Oracle's advisory (unknown in the sources)\n- Until patched, restrict which accounts hold high privileges and limit network exposure of the database port","reach":"network","title":"MySQL Server: InnoDB flaw lets a privileged user crash the database","impact":"low","summary":"A flaw in the InnoDB storage engine of MySQL Server and MySQL Cluster can be triggered over the network by a highly privileged account to hang or repeatedly crash the server. The impact is limited to availability; the sources report no data disclosure or code execution.","category":"package","nicknames":[],"who_cares":["mysql","self-hosted","database"],"confidence":0.7,"needs_auth":"yes","worst_case":"Database server hangs or crashes repeatedly, causing denial of service","analyst_note":"","how_to_check":"- Run `SELECT VERSION();` on the server and compare against the affected ranges: MySQL Server 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1\n- Check whether the server is a MySQL Cluster deployment (NDB) as well as a plain MySQL Server","needs_analyst":false,"not_affected_if":["default-config"],"who_is_affected":"Teams running MySQL Server or MySQL Cluster in the listed version ranges. The attacker needs high privileges and network access, so internet-facing databases with tightly controlled accounts are at lower risk. Teams on other versions or other database engines can skip it.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000682,"input_tokens":3580,"output_tokens":648,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-101609':14A,17A '-2026':13A,16A '/av':164C '26.7.0':95C,106C '26.7.1':96C,107C '3.1':154C,163C '4.4':157C '8.0.0':99C '8.0.49':100C '8.4.0':91C,101C '8.4.12':92C,102C '9.7.0':93C,103C '9.7.3':94C,104C 'abil':137C 'access':118C 'account':47B 'affect':87C 'allow':112C 'attack':115C,129C 'avail':60B,158C 'base':155C 'caus':139C 'cluster':36B,76C,98C,127C,152C 'code':68B 'complet':146C 'compon':81C 'compromis':123C 'crash':9A,52B,145C 'cve':12A,15A 'cvss':153C,160C,162C 'data':65B 'databas':11A,18B 'difficult':108C 'disclosur':66B 'dos':147C 'engin':30B 'execut':69B 'exploit':110C 'flaw':4A,25B 'frequent':143C 'h':172C 'h/pr':166C 'h/ui':167C 'hang':49B,141C 'high':45B,113C 'host':23B 'impact':56B,159C 'innodb':3A,28B,82C 'let':5A 'limit':58B 'multipl':120C 'mysql':1A,19B,32B,35B,73C,75C,80C,89C,97C,124C,126C,149C,151C 'n/a':171C 'n/ac':165C 'n/i':170C 'n/s':168C 'network':42B,117C 'oracl':79C 'packag':20B 'privileg':7A,46B,114C 'product':77C 'protocol':121C 'repeat':51B,144C 'report':63B 'result':134C 'score':156C 'self':22B 'self-host':21B 'server':2A,33B,54B,74C,90C,125C,150C 'sourc':62B 'storag':29B 'success':128C 'support':83C 'trigger':39B 'u/c':169C 'unauthor':136C 'user':8A 'vector':161C 'version':84C 'via':119C 'vulner':70C,111C,132C","nicknames":[],"mitigations":[],"who_affected":"Teams running MySQL Server or MySQL Cluster in the listed version ranges. The attacker needs high privileges and network access, so internet-facing databases with tightly controlled accounts are at lower risk. Teams on other versions or other database engines can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:18:14+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-101609","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101609","severity":null,"published_at":"2026-10-20T22:18:14+00:00","modified_at":"2026-10-21T18:43:53+00:00","first_seen_at":"2026-10-23T21:57:22+00:00","fetched_at":"2026-10-23T22:28:58+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}