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Vulnerabilities

Vulnerability · GHSA-473q-m89c-ghf8

MySqlConnector: Account password disclosed to a man-in-the-middle in zero-configuration TLS mode (clear-text password sent before certificate is verified)

Published Oct 28, 2026 · catalog updated Oct 28, 2026 · MySqlConnector: Account password disclosed

Last checked Oct 31, 2026. A connected source was read within the last 7 days.

Open the advisory

Exploitation likelihood is not on this record for GHSA-473q-m89c-ghf8. A missing EPSS score is not a low risk. Compare MySqlConnector: Account password disclosed with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (MySqlConnector: Account password disclosed).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Advisory link
Affected products
NuGet MySqlConnector

## Summary With set to or with no configured CA certificate, an unvalidated TLS connection is treated as secure and a clear-text password can be sent before the certificate is checked. This can occur when relying on the password to validate a self-signed cert, e.g., MariaDB's [zero-configuration TLS](https://mariadb.com/docs/server/security/encryption/data-in-transit-encryption/zero-configuration-ssl). ## Impact An attacker who can deploy a man-in-the-middle MySQL proxy presenting any self-signed certificate can capture the plaintext database password of a client that: - uses or , and - does not use the connection string option, and - uses a non-empty password. The attacker completes the TLS handshake with its own cert, requests a clear-text password authentication scheme ( , or forces the / clear-text fallback), and receives the password before the fingerprint check rejects the connection, defeating the man-in-the-middle protection is expected to provide. Not affected: a configured CA ( ), CA-validated TLS, local connections (Unix socket / loopback), or empty passwords. Using set to or is out of scope (this is documented as not authenticating the server). ## Workarounds Provide with / , use a local/Unix-socket connection, or avoid clear-text authentication. ## References - https://mariadb.org/mission-impossible-zero-configuration-ssl/

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • NuGet MySqlConnector0 → 2.6.1

How to fix GHSA-473q-m89c-ghf8

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for GHSA-473q-m89c-ghf8. A missing EPSS score is not a low risk. Compare MySqlConnector: Account password disclosed with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with MySqlConnector 0 → 2.6.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-200: Exposure of Sensitive Information. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

MySQL security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 28, 2026 · GitHub Advisory Database

    Detected

    ## Summary With set to or with no configured CA certificate, an unvalidated TLS connection is treated as secure and a clear-text password can be sent before the certificate is checked. This can occur when relying on the password to validate a self-signed cert, e.g., MariaDB's [zero-configuration TLS](https://mariadb.com/docs/server/security/encryption/data-in-transit-encryption/zero-configuration-

  2. Oct 28, 2026 · GitHub Advisory Database

    Fix available

    MySqlConnector fixed in 2.6.1

  3. Oct 28, 2026 · GitHub Advisory Database

    Fix available

    MySqlConnector fixed in 2.6.1

  4. Oct 28, 2026 · GitHub Advisory Database

    Updated

    ## Summary With set to or with no configured CA certificate, an unvalidated TLS connection is treated as secure and a clear-text password can be sent before the certificate is checked. This can occur when relying on the password to validate a self-signed cert, e.g., MariaDB's [zero-configuration TLS](https://mariadb.com/docs/server/security/encryption/data-in-transit-encryption/zero-configuration-

Sources

  • GitHub Advisory DatabasePackage advisoryGHSA-473q-m89c-ghf8

    GitHub Advisory Database record mirrored by OSV.

    github.com
  • OpenSSF OSV / OSV ScannerPackage advisoryGHSA-473q-m89c-ghf8

    MySqlConnector: Account password disclosed to a man-in-the-middle in zero-configuration TLS mode (clear-text password sent before certificate is verified)

    osv.dev

References

Freshness

Last verified in this catalog Oct 28, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • GitHub Advisory DatabaseOct 31, 2026
  • OpenSSF OSV / OSV ScannerOct 31, 2026