Skip to content
Fencer Vulns
high 7.5

CVE-2026-55215 json

MariaDB Connector/Node.js: Connector leaks the cleartext password to an MitM despite `ssl: true`

published 2026-08-28 2 mo ago modified 2026-09-08 2 mo ago also BIT-mariadb-2026-55215 , BIT-mariadb-min-2026-55215 , BIT-mysql-client-2026-55215 , EUVD-2026-67869 , GHSA-cqhc-2h57-wpxf

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

Summary

MariaDB Connector/Node.js is used to connect applications developed on Node.js to MariaDB and MySQL databases. Prior to versions 3.3.3, 3.4.6, and 3.5.3, when ssl is enabled without a pinned CA or server certificate, MariaDB Connector/Node.js sends credentials before completing certificate fingerprint validation. In lib/cmd/handshake/auth/handshake.js, a server that selects mysql_clear_password as the initial authentication plugin can receive the password before the post-TLS identity check. In lib/cmd/handshake/authentication.js, an authentication switch can evaluate the previous plugin instead of the requested target plugin, allowing mysql_clear_password to send the credential first. An active man-in-the-middle can present a self-signed certificate, capture the database password, and use it to authenticate directly even though the connector later rejects the server and closes the connection. This issue is fixed in versions 3.3.3, 3.4.6, and 3.5.3.

Patch / fix

  • npm mariadb 3.2.4, 3.3.3, 3.4.6, 3.5.3
  • bitnami mariadb 3.2.4
  • bitnami mariadb-min 3.2.4
  • bitnami mysql-client 3.2.4
  • mariadb mariadb 3.2.4

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
npm mariadb
<3.2.4
>=3.3.0, <3.3.3
>=3.4.0, <3.4.6
>=3.5.0, <3.5.3
3.2.4
3.3.3
3.4.6
3.5.3
bitnami mariadb
<3.2.4
3.2.4
bitnami mariadb-min
<3.2.4
3.2.4
bitnami mysql-client
<3.2.4
3.2.4

Affected products

  • mariadb-corporation mariadb-connector-nodejs

Classification

Weakness
  • CWE-295 Improper Certificate Validation
  • CWE-522 Insufficiently Protected Credentials
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.