How severe is CVE-2026-34308?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2026-34308 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Oracle Corporation Mysql Server

CVE-2026-34308

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: JSON). Supported versions that are affected are 8.0.0-8.0.45, 8.4.0-8.4.8 and 9.0.0-9.6.0. Easily exploitable vulnerability allows low privileged attacker with…

EPSS: 0.000 (14.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Oracle Corporation Mysql Server — versions 8.0.0, 8.4.0, 9.0.0

Public proof-of-concept exploits

JoakimBulow/CVE-2026-34308

References

Oracle Advisory (vendor-advisory)

Frequently asked questions

What is CVE-2026-34308?: CVE-2026-34308 is a medium-severity vulnerability in Oracle Corporation Mysql Server. CVSS score: 6.5/10. Published 2026-04-21.
How severe is CVE-2026-34308?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2026-34308 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.