6.5

CVE-2026-34303: oracle corporation mysql server Uncontrolled Resource Consumption

CVSS: 6.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-34303DEBIAN-CVE-2026-34303
Published 21-04-2026Last modified 22-04-2026
Open JSON

Vulnerability summary

CVE-2026-34303 is a medium (CVSS 6.5) Uncontrolled Resource Consumption vulnerability in oracle corporation mysql server. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 35.2% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.42%
0%100%
Low · +0.12 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 11 · Related 6
OPENSUSE-SU-2026:10897-1OPENSUSE-SU-2026:20933-1RHSA-2026:20693RHSA-2026:23332RHSA-2026:25052RHSA-2026:25919

Timeline

  1. 21-04-2026
    PublishedVulnerability first disclosed.
  2. 22-04-2026
    Last modifiedVulnerability information updated.

Description

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). 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 network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.42%

Chance of exploitation in the next 30 days

Percentile

35%

Versus all other CVEs

30-day change

+0.12 pp

From 0.30% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.42%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu11 products
  • mariadbAll versions (No fix recorded)
  • mariadb-10.0All versions (No fix recorded)
  • mariadb-10.1All versions (No fix recorded)
  • mariadb-10.3All versions (No fix recorded)
  • mariadb-10.6All versions (No fix recorded)
Debian1 product
  • mariadb< 1:10.11.18-0+deb12u1 | < 1:11.8.6-0+deb13u1 | < 1:11.8.6-1
Oracle1 product
  • mysql_server≥ 8.0.0, ≤ 8.0.45 | ≥ 8.4.0, ≤ 8.4.8 | ≥ 9.0.0, ≤ 9.6.0
Oracle corporation1 product
  • mysql server≥ 8.0.0, ≤ 8.0.45 | ≥ 8.4.0, ≤ 8.4.8 | ≥ 9.0.0, ≤ 9.6.0

4 vendors · 14 products

References

7 links