{"id":"CVE-2026-101729","kind":"vulnerability","aliases":["CVE-2026-101729"],"related":[],"title":"MySQL Server replication flaw lets a privileged user crash the database","description":"Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Replication).  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 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 4.9 (Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).","summary":"A flaw in the MySQL Server Replication component lets a high-privileged attacker with network access hang or repeatedly crash MySQL Server and MySQL Cluster. The sources describe only an availability impact, with no data read or code execution.","severity":"medium","cvss":4.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["database","mysql","package","self-hosted"],"not_affected_if":["default-config"],"how_to_check":"- Run `mysql -V` or `SELECT VERSION();` 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.","fix":"- Upgrade MySQL Server and MySQL Cluster to the patched release in Oracle's April 2026 Critical Patch Update (fixed versions not named in the sources).","status":"open","published_at":"2026-10-20T22:18:27+00:00","first_seen_at":"2026-10-23T21:57:23+00:00","triaged_at":"2026-10-25T04:31:26+00:00","updated_at":"2026-10-25T04:31:26+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-25T04:31:26Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade MySQL Server and MySQL Cluster to the patched release in Oracle's April 2026 Critical Patch Update (fixed versions not named in the sources).","reach":"network","title":"MySQL Server replication flaw lets a privileged user crash the database","impact":"low","summary":"A flaw in the MySQL Server Replication component lets a high-privileged attacker with network access hang or repeatedly crash MySQL Server and MySQL Cluster. The sources describe only an availability impact, with no data read or code execution.","category":"package","nicknames":[],"who_cares":["mysql","self-hosted","database"],"confidence":0.6,"needs_auth":"yes","worst_case":"Database server hangs or crashes repeatedly, causing denial of service.","analyst_note":"Confirm the patched MySQL versions from Oracle's Critical Patch Update advisory and whether the replication component needs special configuration to be reachable.","how_to_check":"- Run `mysql -V` or `SELECT VERSION();` 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.","needs_analyst":true,"not_affected_if":["default-config"],"who_is_affected":"Teams running MySQL Server or MySQL Cluster in the listed version ranges with network access to the database. The attacker needs high privileges, so databases reachable only by trusted administrators carry lower risk, but unpatched exposed instances should still be updated.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000669,"input_tokens":3581,"output_tokens":622,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-101729':14A,17A '-2026':13A,16A '/av':158C '26.7.0':90C,101C '26.7.1':91C,102C '3.1':148C,157C '4.9':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':40B,112C 'affect':82C 'allow':106C 'attack':37B,109C,123C 'avail':55B,152C 'base':149C 'caus':133C 'cluster':49B,70C,93C,121C,146C 'code':62B 'complet':140C 'compon':31B,75C 'compromis':117C 'crash':9A,44B,139C 'cve':12A,15A 'cvss':147C,154C,156C 'data':59B 'databas':11A,18B 'describ':52B 'dos':141C 'easili':103C 'execut':63B 'exploit':104C 'flaw':4A,25B 'frequent':137C 'h':166C 'h/ui':161C 'hang':41B,135C 'high':35B,107C 'high-privileg':34B 'host':23B 'impact':56B,153C 'l/pr':160C 'let':5A,32B 'multipl':114C 'mysql':1A,19B,28B,45B,48B,67C,69C,74C,84C,92C,118C,120C,143C,145C 'n/a':165C 'n/ac':159C 'n/i':164C 'n/s':162C 'network':39B,111C 'oracl':73C 'packag':20B 'privileg':7A,36B,108C 'product':71C 'protocol':115C 'read':60B 'repeat':43B,138C 'replic':3A,30B,77C 'result':128C 'score':150C 'self':22B 'self-host':21B 'server':2A,29B,46B,68C,76C,85C,119C,144C 'sourc':51B 'success':122C 'support':78C 'u/c':163C 'unauthor':130C 'user':8A 'vector':155C 'version':79C 'via':113C 'vulner':64C,105C,126C","nicknames":[],"mitigations":[],"who_affected":"Teams running MySQL Server or MySQL Cluster in the listed version ranges with network access to the database. The attacker needs high privileges, so databases reachable only by trusted administrators carry lower risk, but unpatched exposed instances should still be updated.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:18:27+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/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-2026-101729","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101729","severity":null,"published_at":"2026-10-20T22:18:27+00:00","modified_at":"2026-10-22T18:17:16+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"}