{"id":"CVE-2026-92262","kind":"vulnerability","aliases":["CVE-2026-92262"],"related":[],"title":"MariaDB server is a community developed fork of MySQL server","description":"MariaDB server is a community developed fork of MySQL server. From 10.6.1 until 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2, the #mysql50# bypass prefix is affected because it allows the #mysql50# prefix to bypass normal table-name filesystem encoding. An attacker can trigger the issue with a table name using the #mysql50# prefix, then use a #mysql50# table name to access files under their legacy unencoded name and cause crashes, data corruption, data exfiltration, or remote code execution. This issue is fixed in versions 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2.","summary":"MariaDB server accepts table names with a legacy #mysql50# prefix that skips normal filesystem name encoding, so table names can point at unencoded files on disk. An attacker with the ability to create tables can read or corrupt data and may reach remote code execution.","severity":"critical","cvss":9.9,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"mariadb","fixed":["10.6.28"],"affected":">= 10.6.1, < 10.6.28","ecosystem":"vendor"},{"name":"mariadb","fixed":["10.11.19"],"affected":">= 10.11.1, < 10.11.19","ecosystem":"vendor"},{"name":"mariadb","fixed":["11.4.13"],"affected":">= 11.4.1, < 11.4.13","ecosystem":"vendor"},{"name":"mariadb","fixed":["11.8.9"],"affected":">= 11.8.1, < 11.8.9","ecosystem":"vendor"},{"name":"mariadb","fixed":["12.3.3"],"affected":">= 12.3.1, < 12.3.3","ecosystem":"vendor"},{"name":"mariadb","fixed":[],"affected":"= 13.0.1","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["database","mariadb","package","self-hosted"],"not_affected_if":["managed-hosting","version-outside-affected-ranges"],"how_to_check":"Run SELECT VERSION(); on the MariaDB server and compare against the fixed versions.","fix":"Upgrade MariaDB to 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, or 13.0.2 (or the patched release on your branch).","status":"open","published_at":"2026-10-16T17:17:52+00:00","first_seen_at":"2026-10-23T21:57:13+00:00","triaged_at":"2026-10-23T21:59:59+00:00","updated_at":"2026-10-23T22:28:55+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-23T21:59:59Z","model":"claude-haiku-5-5","output":{"fix":"Upgrade MariaDB to 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, or 13.0.2 (or the patched release on your branch).\nunknown","reach":"network","impact":"high","summary":"MariaDB server accepts table names with a legacy #mysql50# prefix that skips normal filesystem name encoding, so table names can point at unencoded files on disk. An attacker with the ability to create tables can read or corrupt data and may reach remote code execution.","category":"package","who_cares":["mariadb","self-hosted","database"],"confidence":0.6,"needs_auth":"yes","worst_case":"Attacker reads, corrupts, or exfiltrates database files and may run code on the server","analyst_note":"Check the MariaDB advisory and NVD entry for the exact privileges needed to create the table and whether the flaw needs a non-default setting; the sources give no detail on the exploit prerequisites.","how_to_check":"Run SELECT VERSION(); on the MariaDB server and compare against the fixed versions.\nunknown","needs_analyst":true,"not_affected_if":["version-outside-affected-ranges","managed-hosting"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000516,"input_tokens":2912,"output_tokens":450,"severity_before":"critical"},"analyst_status":null,"analyst_note":null,"search":"'-2026':12A,15A '-92262':13A,16A '10.11.19':88C,160C '10.6.1':85C '10.6.28':87C,159C '11.4.13':89C,161C '11.8.9':90C,162C '12.3.3':91C,163C '13.0.2':93C,165C 'abil':59B 'accept':31B 'access':135C 'affect':99C 'allow':102C 'attack':56B,115C 'bypass':96C,107C 'caus':143C 'code':72B,151C 'communiti':5A,78C 'corrupt':66B,146C 'crash':144C 'creat':61B 'cve':11A,14A 'data':67B,145C,147C 'databas':23B 'develop':6A,79C 'disk':54B 'encod':44B,113C 'execut':73B,152C 'exfiltr':148C 'file':52B,136C 'filesystem':42B,112C 'fix':156C 'fork':7A,80C 'host':28B 'issu':119C,154C 'legaci':36B,139C 'mariadb':1A,17A,18A,19A,20A,21A,22A,24B,29B,74C 'may':69B 'mysql':9A,82C 'mysql50':37B,95C,104C,126C,131C 'name':33B,43B,47B,111C,123C,133C,141C 'normal':41B,108C 'packag':25B 'point':49B 'prefix':38B,97C,105C,127C 'reach':70B 'read':64B 'remot':71B,150C 'self':27B 'self-host':26B 'server':2A,10A,30B,75C,83C 'skip':40B 'tabl':32B,46B,62B,110C,122C,132C 'table-nam':109C 'trigger':117C 'unencod':51B,140C 'use':124C,129C 'version':158C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-16T17:17:52+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cvss_by":"security-advisories@github.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-92262","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92262","severity":null,"published_at":"2026-10-16T17:17:52+00:00","modified_at":"2026-10-21T03:17:20+00:00","first_seen_at":"2026-10-23T21:57:13+00:00","fetched_at":"2026-10-23T22:28:55+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"}