CVE-2026-55855MariaDB Connector/Node.js: Possible SQL injection in Buffer parameter escaping under big5/gbk/sjis/cp932/gb18030 client charsets
- 6.5MediumCVSS base score
- 0.69%Exploitation in 30 daysEPSS · top 47% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By GitHub_M
- 2 months later
· 2 months later
Published
- 3 days later
· 3 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N |
| NVDNVD · Awaiting Analysis | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.69% · top 47% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Affected products
mariadb-corporation · mariadb-connector-nodejs
- affected < 3.2.4
- affected >= 3.3.0, < 3.3.3
- affected >= 3.4.0, < 3.4.6
- affected >= 3.5.0, < 3.5.3
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npmmariadbGHSA-g5xc-5w98-jfvm (opens in a new tab)
References
References10
- https://github.com/mariadb-corporation/mariadb-connector-nodejs/security/advisories/GHSA-g5xc-5w98-jfvm (opens in a new tab)x_refsource_CONFIRM
- https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/25c6239b68fd909132355c3f8535a5ef32423468 (opens in a new tab)x_refsource_MISC
- https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/26e35f9edb00bcf249627a564e0052fba7b305a2 (opens in a new tab)x_refsource_MISC
- https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/7af8b7b8b7ae5e1a081693ade989f5a80c8e06e3 (opens in a new tab)x_refsource_MISC
- https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/97f183f33b5d4e6767b34ecabdd81fe3294a80a6 (opens in a new tab)x_refsource_MISC
- https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.2.4 (opens in a new tab)x_refsource_MISC
- https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.3.3 (opens in a new tab)x_refsource_MISC
- https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.4.6 (opens in a new tab)x_refsource_MISC
- https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.5.3 (opens in a new tab)x_refsource_MISC
- https://jira.mariadb.org/browse/CONJS-350 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-68011 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-g5xc-5w98-jfvm (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-55855)Record last updated .