CVE-2026-92262
Description
A flaw was found in MariaDB. An authenticated remote attacker can supply a crafted table name with the #mysql50# prefix, which bypasses normal filesystem encoding for table names. By accessing files under unencoded legacy names, the attacker can achieve arbitrary code execution, exfiltrate sensitive information, corrupt data, or trigger a denial of service (DoS) by crashing the database server.
Statement
Red Hat Product Security rates this vulnerability as having an Important severity because an authenticated database user can achieve arbitrary code execution, exfiltrate data, or crash the database service across a network boundary, resulting in a severe compromise of system confidentiality and availability. While default deployments of MariaDB in Red Hat environments restrict direct network connectivity and require valid authentication credentials to submit queries, any user with table-level interaction capabilities can exploit the flaw without needing administrative privileges. The severity is elevated beyond Moderate because bypassing filesystem name encoding can breach the database sandbox and access underlying host files, though the prerequisite of existing database credentials prevents this from reaching Critical severity.
Mitigation
Upgrade to the fixed version of MariaDB Server
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 8.8 | N/A | 9.9 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Changed |
| Confidentiality | High | N/A | High |
| Integrity Impact | High | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Understanding the Weakness (CWE)
Integrity,Confidentiality
Technical Impact: Read Files or Directories
The application can operate on unexpected files, such as system files or configuration files. Confidentiality is violated when the targeted filename is not directly readable by the attacker.
Integrity,Confidentiality,Availability
Technical Impact: Modify Files or Directories; Execute Unauthorized Code or Commands
The application can operate on unexpected files. This may violate integrity if the filename is written to, or if the filename is for a program or other form of executable code.
Availability
Technical Impact: DoS: Crash, Exit, or Restart; DoS: Resource Consumption (Other)
The application can operate on unexpected files. Availability can be violated if the attacker specifies an unexpected file that the application modifies. Availability can also be affected if the attacker specifies a filename for a large file, or points to a special device or a file that does not have the format that the application expects.
Frequently Asked Questions
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