{"id":"CVE-2026-101747","kind":"vulnerability","aliases":["CVE-2026-101747"],"related":[],"title":"MySQL Server InnoDB flaw lets a low-privileged user crash the server","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. Easily exploitable vulnerability allows low 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 6.5 (Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/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 low-privileged account. A successful attack causes a hang or repeatable crash, which takes the database offline.","severity":"medium","cvss":6.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["database","mysql","package","self-hosted"],"not_affected_if":["unaffected-version"],"how_to_check":"- Run `SELECT VERSION();` in the MySQL client and compare against the affected ranges: MySQL Server 8.4.0 to 8.4.12, 9.7.0 to 9.7.3, 26.7.0 to 26.7.1; MySQL Cluster 8.0.0 to 8.0.49, 8.4.0 to 8.4.12, 9.7.0 to 9.7.3, 26.7.0 to 26.7.1.","fix":"- Upgrade MySQL Server or MySQL Cluster to a release after the affected ranges listed above; the sources do not name the fixed version numbers.","status":"open","published_at":"2026-10-20T22:18:29+00:00","first_seen_at":"2026-10-23T21:57:23+00:00","triaged_at":"2026-10-25T03:53:48+00:00","updated_at":"2026-10-25T03:53:48+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-25T03:53:48Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade MySQL Server or MySQL Cluster to a release after the affected ranges listed above; the sources do not name the fixed version numbers.","reach":"network","title":"MySQL Server InnoDB flaw lets a low-privileged user crash the server","impact":"medium","summary":"A flaw in the InnoDB storage engine of MySQL Server and MySQL Cluster can be triggered over the network by a low-privileged account. A successful attack causes a hang or repeatable crash, which takes the database offline.","category":"package","nicknames":[],"who_cares":["mysql","self-hosted","database"],"confidence":0.7,"needs_auth":"yes","worst_case":"Database server hangs or crashes repeatedly, causing a full denial of service.","analyst_note":"Check the Oracle Critical Patch Update advisory for the fixed MySQL versions and whether any MySQL Cluster 8.0 patch exists beyond 8.0.49.","how_to_check":"- Run `SELECT VERSION();` in the MySQL client and compare against the affected ranges: MySQL Server 8.4.0 to 8.4.12, 9.7.0 to 9.7.3, 26.7.0 to 26.7.1; MySQL Cluster 8.0.0 to 8.0.49, 8.4.0 to 8.4.12, 9.7.0 to 9.7.3, 26.7.0 to 26.7.1.","needs_analyst":true,"not_affected_if":["unaffected-version"],"who_is_affected":"Teams running MySQL Server or MySQL Cluster in the affected version ranges that accept connections from users or other network clients. Attackers need a valid low-privilege database account and network access to the server. Instances on unaffected versions or with no untrusted database accounts are lower risk.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000684,"input_tokens":3579,"output_tokens":653,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-101747':16A,19A '-2026':15A,18A '/av':158C '26.7.0':90C,101C '26.7.1':91C,102C '3.1':148C,157C '6.5':151C '8.0.0':94C '8.0.49':95C '8.4.0':86C,96C '8.4.12':87C,97C '9.7.0':88C,98C '9.7.3':89C,99C 'abil':131C 'access':112C 'account':50B 'affect':82C 'allow':106C 'attack':53B,109C,123C 'avail':152C 'base':149C 'caus':54B,133C 'cluster':38B,71C,93C,121C,146C 'complet':140C 'compon':76C 'compromis':117C 'crash':11A,59B,139C 'cve':14A,17A 'cvss':147C,154C,156C 'databas':20B,63B 'dos':141C 'easili':103C 'engin':32B 'exploit':104C 'flaw':4A,27B 'frequent':137C 'h':166C 'hang':56B,135C 'host':25B 'impact':153C 'innodb':3A,30B,77C 'l/pr':160C 'l/ui':161C 'let':5A 'low':8A,48B,107C 'low-privileg':7A,47B 'multipl':114C 'mysql':1A,21B,34B,37B,68C,70C,75C,84C,92C,118C,120C,143C,145C 'n/a':165C 'n/ac':159C 'n/i':164C 'n/s':162C 'network':44B,111C 'offlin':64B 'oracl':74C 'packag':22B 'privileg':9A,49B,108C 'product':72C 'protocol':115C 'repeat':58B,138C 'result':128C 'score':150C 'self':24B 'self-host':23B 'server':2A,13A,35B,69C,85C,119C,144C 'storag':31B 'success':52B,122C 'support':78C 'take':61B 'trigger':41B 'u/c':163C 'unauthor':130C 'user':10A 'vector':155C 'version':79C 'via':113C 'vulner':65C,105C,126C","nicknames":[],"mitigations":[],"who_affected":"Teams running MySQL Server or MySQL Cluster in the affected version ranges that accept connections from users or other network clients. Attackers need a valid low-privilege database account and network access to the server. Instances on unaffected versions or with no untrusted database accounts are lower risk.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:18:29+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/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-2026-101747","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101747","severity":null,"published_at":"2026-10-20T22:18:29+00:00","modified_at":"2026-10-22T18:17:18+00:00","first_seen_at":"2026-10-23T21:57:23+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"}