CVE-2026-107819
published 2026-10-09CVE-2026-107819: MariaDB Connector/C is a C and C++ client library for connecting applications to MariaDB and MySQL databases. From 3.4.1 until 3.4.10, the MariaDB Connector/C…
PriorityP335medium5.9CVSS 3.1
AVNACHPRNUINSUCHINAN
EPSS
0.24%
14.5th percentile
MariaDB Connector/C is a C and C++ client library for connecting applications to MariaDB and MySQL databases. From 3.4.1 until 3.4.10, the MariaDB Connector/C libmariadb Zero-Configuration SSL authentication-switch logic checked certificate trust failure but did not reject a TLS hostname verification mismatch before selecting a non-hashing authentication plugin. An active man-in-the-middle attacker with a valid certificate for another hostname could request mysql_clear_password and obtain the database password inside the attacker-controlled TLS connection. Other MariaDB connectors are not affected. This issue is fixed in version 3.4.10.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mariadb | server | — | — |
CVSS provenance
nvdv3.15.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
vendor_redhat5.9MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
VulDB
MariaDB Connector/C up to 3.4.9 certificate validation
vuldb·2026-10-09·CVSS 5.9
CVE-2026-107819 [MEDIUM] MariaDB Connector/C up to 3.4.9 certificate validation
A vulnerability was found in MariaDB Connector and C up to 3.4.9. It has been classified as problematic. This affects an unknown function of the component Zero-Configuration SSL Authentication Switch Logic. The manipulation leads to improper certificate validation.
This vulnerability is listed as CVE-2026-107819. The attack may be initiated remotely. There is no available exploit.
Upgrading the affected component is recommended.
Red Hat
mariadb-connector-c: mariadb-connector-c: Information disclosure via improper TLS hostname verification
vendor_redhat·2026-10-09·CVSS 5.9
CVE-2026-107819 [MEDIUM] CWE-295 mariadb-connector-c: mariadb-connector-c: Information disclosure via improper TLS hostname verification
mariadb-connector-c: mariadb-connector-c: Information disclosure via improper TLS hostname verification
A flaw was found in MariaDB Connector/C. During automatic Transport Layer Security (TLS) connection setup, the library verifies certificate trust but fails to confirm that the server hostname matches the certificate before switching authentication methods. An active man-in-the-middle (MitM) attacker with a valid certificate for a different domain can exploit this vulnerability to intercept the encrypted connection, request plaintext authentication, and capture database passwords.
Package: mariadb-connector-c (Red Hat Enterprise Linux 10) - Fix deferred
Package: mariadb-connector-c (Red Hat Enterprise Linux 8) - Fix deferred
Package: mariadb-connector-c (Red Hat Enterprise Linux 9) -
No detection rules found.
No public exploits indexed.
Hackernews
⚡ Weekly Recap: 98 Zero-Days, Rogue AI Agents, $100M Crypto Theft, 700 Supermarkets Hit and More
blogs_hackernews·2026-10-19
CVE-2026-102764 ⚡ Weekly Recap: 98 Zero-Days, Rogue AI Agents, $100M Crypto Theft, 700 Supermarkets Hit and More
Home
Threat Intelligence
Vulnerabilities
Cyber Attacks
Webinars
Expert Insights
Awards
Webinars
Awards
Free eBooks
About THN
Jobs
Advertise with us
## ⚡ Weekly Recap: 98 Zero-Days, Rogue AI Agents, $100M Crypto Theft, 700 Supermarkets Hit and More
The worst problems don't always come with a warning. Sometimes they arrive through a service everyone trusts, a device someone bought, or a system nobody thought to check. By the time something looks wrong, the damage may already be done.
This week had plenty of that. Trusted connections became a problem. Hardware wasn't as safe as it looked. Old bugs found new victims, and some systems were left so exposed that breaking in barely required any effort. Even AI agents crossed lines they weren't supposed to.
Some attacks were cleve
Bugzilla
CVE-2026-107819 mariadb-connector-c: mariadb-connector-c: Information disclosure via improper TLS hostname verification
bugzilla·2026-10-09·CVSS 5.9
CVE-2026-107819 [MEDIUM] CVE-2026-107819 mariadb-connector-c: mariadb-connector-c: Information disclosure via improper TLS hostname verification
CVE-2026-107819 mariadb-connector-c: mariadb-connector-c: Information disclosure via improper TLS hostname verification
MariaDB Connector/C is a C and C++ client library for connecting applications to MariaDB and MySQL databases. From 3.4.1 until 3.4.10, the MariaDB Connector/C libmariadb Zero-Configuration SSL authentication-switch logic checked certificate trust failure but did not reject a TLS hostname verification mismatch before selecting a non-hashing authentication plugin. An active man-in-the-middle attacker with a valid certificate for another hostname could request mysql_clear_password and obtain the database password inside the attacker-controlled TLS connection. Other MariaDB connectors are not affected. This issue is fixed in version 3.4.10.
2026-10-09
Published