{"id":"CVE-2026-101800","kind":"vulnerability","aliases":["CVE-2026-101800"],"related":[],"title":"MySQL Server: privileges flaw lets low-privileged users change or read critical data","description":"Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Security: Privileges).  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 low privileged attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster.  Successful attacks of this vulnerability can result in  unauthorized creation, deletion or modification access to critical data or all MySQL Server, MySQL Cluster accessible data as well as  unauthorized access to critical data or complete access to all MySQL Server, MySQL Cluster accessible data. CVSS 3.1 Base Score 6.8 (Confidentiality and Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N).","summary":"A flaw in the MySQL Server privileges component lets a low-privileged account over the network create, change or delete data it should not reach, and read critical data. Exploiting it is difficult, and the CVSS score is 6.8 with high confidentiality and integrity impact.","severity":"medium","cvss":6.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["database","mysql","package","self-hosted"],"not_affected_if":["no-low-privilege-accounts","unaffected-version"],"how_to_check":"- Run `SELECT VERSION();` on the MySQL server and compare against the affected ranges: 8.4.0 to 8.4.12, 9.7.0 to 9.7.3, 26.7.0 to 26.7.1 for MySQL Server; 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 for MySQL Cluster\n- Check for non-admin accounts with network access: `SELECT user, host FROM mysql.user;`","fix":"- Upgrade MySQL Server or MySQL Cluster to a release after the affected ranges listed above (the fixed version numbers are unknown from the sources)\n- Until patched, limit low-privileged accounts to the minimum grants and restrict network access to the database port","status":"open","published_at":"2026-10-20T22:18:35+00:00","first_seen_at":"2026-10-23T21:57:23+00:00","triaged_at":"2026-10-25T03:44:28+00:00","updated_at":"2026-10-25T03:44:28+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-25T03:44:28Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade MySQL Server or MySQL Cluster to a release after the affected ranges listed above (the fixed version numbers are unknown from the sources)\n- Until patched, limit low-privileged accounts to the minimum grants and restrict network access to the database port","reach":"network","title":"MySQL Server: privileges flaw lets low-privileged users change or read critical data","impact":"high","summary":"A flaw in the MySQL Server privileges component lets a low-privileged account over the network create, change or delete data it should not reach, and read critical data. Exploiting it is difficult, and the CVSS score is 6.8 with high confidentiality and integrity impact.","category":"package","nicknames":[],"who_cares":["mysql","self-hosted","database"],"confidence":0.6,"needs_auth":"yes","worst_case":"Attacker with low-privilege account reads or alters critical database data","analyst_note":"Check Oracle's MySQL security advisory (April 2026 CPU) for the fixed versions and any specific privilege-check details, since the sources give no fix version.","how_to_check":"- Run `SELECT VERSION();` on the MySQL server and compare against the affected ranges: 8.4.0 to 8.4.12, 9.7.0 to 9.7.3, 26.7.0 to 26.7.1 for MySQL Server; 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 for MySQL Cluster\n- Check for non-admin accounts with network access: `SELECT user, host FROM mysql.user;`","needs_analyst":true,"not_affected_if":["unaffected-version","no-low-privilege-accounts"],"who_is_affected":"Teams running MySQL Server or MySQL Cluster in the affected version ranges that accept network connections from users with ordinary, low-privileged accounts. Systems on unaffected versions, or with no untrusted low-privileged accounts reachable over the network, face a smaller risk.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000733,"input_tokens":3632,"output_tokens":740,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-101800':17A,20A '-2026':16A,19A '/av':190C '26.7.0':100C,111C '26.7.1':101C,112C '3.1':178C,189C '6.8':66B,181C '8.0.0':104C '8.0.49':105C '8.4.0':96C,106C '8.4.12':97C,107C '9.7.0':98C,108C '9.7.3':99C,109C 'access':123C,146C,156C,162C,168C,175C 'account':40B 'affect':92C 'allow':117C 'attack':120C,134C 'base':179C 'chang':10A,45B 'cluster':79C,103C,132C,155C,174C 'complet':167C 'compon':34B,84C 'compromis':128C 'confidenti':69B,182C 'creat':44B 'creation':142C 'critic':13A,55B,148C,164C 'cve':15A,18A 'cvss':63B,177C,186C,188C 'data':14A,48B,56B,149C,157C,165C,176C 'databas':21B 'delet':47B,143C 'difficult':60B,113C 'exploit':57B,115C 'flaw':4A,28B 'h/a':197C 'h/i':196C 'h/pr':192C 'high':68B 'host':26B 'impact':72B,185C 'integr':71B,184C 'l/ui':193C 'let':5A,35B 'low':7A,38B,118C 'low-privileg':6A,37B 'modif':145C 'multipl':125C 'mysql':1A,22B,31B,76C,78C,83C,94C,102C,129C,131C,152C,154C,171C,173C 'n':198C 'n/ac':191C 'n/s':194C 'network':43B,122C 'oracl':82C 'packag':23B 'privileg':3A,8A,33B,39B,87C,119C 'product':80C 'protocol':126C 'reach':52B 'read':12A,54B 'result':139C 'score':64B,180C 'secur':86C 'self':25B 'self-host':24B 'server':2A,32B,77C,85C,95C,130C,153C,172C 'success':133C 'support':88C 'u/c':195C 'unauthor':141C,161C 'user':9A 'vector':187C 'version':89C 'via':124C 'vulner':73C,116C,137C 'well':159C","nicknames":[],"mitigations":[],"who_affected":"Teams running MySQL Server or MySQL Cluster in the affected version ranges that accept network connections from users with ordinary, low-privileged accounts. Systems on unaffected versions, or with no untrusted low-privileged accounts reachable over the network, face a smaller risk.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:18:35+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-101800","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101800","severity":null,"published_at":"2026-10-20T22:18:35+00:00","modified_at":"2026-10-22T16:17:18+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"}