{"id":"CVE-2026-101637","kind":"vulnerability","aliases":["CVE-2026-101637"],"related":[],"title":"MySQL Server InnoDB flaw lets privileged users crash database or alter data","description":"Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: InnoDB).  Supported versions that are affected are MySQL Server: 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 9.7.0-9.7.3 and  26.7.0-26.7.1. Easily exploitable 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 as well as  unauthorized update, insert or delete access to some of MySQL Server, MySQL Cluster accessible data. CVSS 3.1 Base Score 5.5 (Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/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. Successful exploitation can crash or hang the server and allow unauthorized changes to some stored data.","severity":"medium","cvss":5.5,"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 each MySQL Server and MySQL Cluster node and compare against the affected versions 9.7.0-9.7.3 and 26.7.0-26.7.1\n- Check whether the server is listed in the affected MySQL Cluster 9.7.0-9.7.3 or 26.7.0-26.7.1 builds","fix":"- Upgrade MySQL Server to a release newer than `9.7.3` or `26.7.1` once Oracle publishes the fixed build (unknown fixed version in the sources)\n- Upgrade MySQL Cluster on the same schedule (unknown fixed version in the sources)","status":"open","published_at":"2026-10-20T22:18:17+00:00","first_seen_at":"2026-10-23T21:57:22+00:00","triaged_at":"2026-10-25T04:12:20+00:00","updated_at":"2026-10-25T04:12:20+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-25T04:12:20Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade MySQL Server to a release newer than `9.7.3` or `26.7.1` once Oracle publishes the fixed build (unknown fixed version in the sources)\n- Upgrade MySQL Cluster on the same schedule (unknown fixed version in the sources)","reach":"network","title":"MySQL Server InnoDB flaw lets privileged users crash database or alter data","impact":"medium","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. Successful exploitation can crash or hang the server and allow unauthorized changes to some stored data.","category":"package","nicknames":[],"who_cares":["mysql","database","self-hosted"],"confidence":0.6,"needs_auth":"yes","worst_case":"Server crashes repeatedly and some stored data can be modified or deleted.","analyst_note":"Confirm the fixed MySQL versions and the Oracle Critical Patch Update advisory for CVE-2026-101637 in the NVD entry, since the sources give no fix version.","how_to_check":"- Run `SELECT VERSION();` on each MySQL Server and MySQL Cluster node and compare against the affected versions 9.7.0-9.7.3 and 26.7.0-26.7.1\n- Check whether the server is listed in the affected MySQL Cluster 9.7.0-9.7.3 or 26.7.0-26.7.1 builds","needs_analyst":true,"not_affected_if":["default-config"],"who_is_affected":"Teams running MySQL Server or MySQL Cluster on the affected 9.7.x or 26.7.x releases are exposed. Exploitation requires a highly privileged database account reaching the server over the network, so servers that only accept trusted, tightly limited accounts carry lower risk. Systems on other MySQL or MariaDB versions are not listed as affected.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000706,"input_tokens":3584,"output_tokens":696,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-101637':15A,18A '-2026':14A,17A '/av':172C '26.7.0':88C,95C '26.7.1':89C,96C '3.1':160C,171C '5.5':163C '9.7.0':86C,92C '9.7.3':87C,93C 'abil':125C 'access':106C,149C,157C 'account':48B 'affect':82C 'allow':58B,100C 'alter':11A 'attack':103C,117C 'avail':166C 'base':161C 'caus':127C 'chang':60B 'cluster':37B,71C,91C,115C,140C,156C 'complet':134C 'compon':76C 'compromis':111C 'crash':8A,52B,133C 'cve':13A,16A 'cvss':159C,168C,170C 'data':12A,64B,158C 'databas':9A,19B 'delet':148C 'dos':135C 'easili':97C 'engin':31B 'exploit':50B,98C 'flaw':4A,26B 'frequent':131C 'h':180C 'h/ui':175C 'hang':54B,129C 'high':46B,101C 'host':24B 'impact':167C 'innodb':3A,29B,77C 'insert':146C 'integr':164C 'l/a':179C 'l/pr':174C 'let':5A 'multipl':108C 'mysql':1A,20B,33B,36B,68C,70C,75C,84C,90C,112C,114C,137C,139C,153C,155C 'n/ac':173C 'n/i':178C 'n/s':176C 'network':43B,105C 'oracl':74C 'packag':21B 'privileg':6A,47B,102C 'product':72C 'protocol':109C 'repeat':132C 'result':122C 'score':162C 'self':23B 'self-host':22B 'server':2A,34B,56B,69C,85C,113C,138C,154C 'storag':30B 'store':63B 'success':49B,116C 'support':78C 'trigger':40B 'u/c':177C 'unauthor':59B,124C,144C 'updat':145C 'user':7A 'vector':169C 'version':79C 'via':107C 'vulner':65C,99C,120C 'well':142C","nicknames":[],"mitigations":[],"who_affected":"Teams running MySQL Server or MySQL Cluster on the affected 9.7.x or 26.7.x releases are exposed. Exploitation requires a highly privileged database account reaching the server over the network, so servers that only accept trusted, tightly limited accounts carry lower risk. Systems on other MySQL or MariaDB versions are not listed as affected.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:18:17+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-101637","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101637","severity":null,"published_at":"2026-10-20T22:18:17+00:00","modified_at":"2026-10-21T19:16:52+00:00","first_seen_at":"2026-10-23T21:57:22+00:00","fetched_at":"2026-10-23T22:28:59+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"}