Answer in brief
CVE-2026-55855 records a Medium severity (CVSS 6.5) vulnerability in MariaDB Connector/Node.js: Possible SQL injection in Buffer parameter escaping under big5/gbk/sjis/cp932/gb18030 client charsets. The current sources do not mark it as known exploited. The current feed maps mariadb-corporation/mariadb-connector-nodejs (generic), mariadb (npm), mariadb (npm), mariadb (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps mariadb-corporation/mariadb-connector-nodejs (generic), mariadb (npm), mariadb (npm), mariadb (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| mariadb-corporation/mariadb-connector-nodejsgeneric | < 3.2.4 || >= 3.3.0, < 3.3.3 || >= 3.4.0, < 3.4.6 || >= 3.5.0, < 3.5.3 | Not reported |
| mariadbnpm | <3.2.4 | 3.2.4 |
| mariadbnpm | >=3.3.0,<3.3.3 | 3.3.4 |
| mariadbnpm | >=3.4.0,<3.4.6 | 3.4.6 |
| mariadbnpm | >=3.5.0,<3.5.3 | 3.5.3 |
Published upstream
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 28, 2026
MariaDB Connector/Node.js is used to connect applications developed on Node.js to MariaDB and MySQL databases. Prior to 3.2.4, 3.3.3, 3.4.6, and 3.5.3, MariaDB Connector/Node.js permits SQL injection when attacker-controlled Buffer parameters are escaped client-side under the big5, gbk, sjis, cp932, or gb18030 client character sets. PacketOutputStream.writeBufferEscape in lib/io/packet-output-stream.js escaped bytes without the charset-aware getMbRecognizer logic in lib/misc/charset-mb.js. The server SQL lexer runs my_ismbchar before escape processing, so an attacker-controlled lead byte can consume the inserted 0x5C backslash as a multibyte trail byte and leave the following 0x27 quote unescaped, terminating the string literal and allowing arbitrary SQL. The default utf8mb4 character set and parameters sent through the execute binary prepared-statement path are not affected. Successful exploitation can expose or modify data available to the database account. This issue is fixed in versions 3.2.4, 3.3.3, 3.4.6, and 3.5.3.
Quoted source text, attributed separately from HOL analysis.