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TI-2026-26556 Aliases CVE-2026-34267GHSA-3gfg-g579-3wmq

Uncontrolled resource consumption in Oracle MySQL Server

Priority LOW 22CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 3 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-400.

Summary

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.0-8.0.45. Easily exploitable vulnerability allows high 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 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00323 25th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 3 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OracleMySQL Server8.0.0 – 8.0.45—No fix listedCNA
  • MySQL Server VendorOracle Affected 8.0.0 – 8.0.45 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*8.0.0 – 8.0.45VulnerableOracle
  • cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* Versions 8.0.0 – 8.0.45 Vulnerable ·Oracle

Remediation

Red Hat 2 advisories

  • RHSA-2026:25919 Released 2026-06-15 · Red Hat rating Moderate
    mysql:8.0 security update
    • Red Hat Enterprise Linux AppStream (v. 8) mecab-0.996-2.module+el8.10.0+22857+7f331edd.aarch64::mysql:8.0, mecab-0.996-2.module+el8.10.0+22857+7f331edd.ppc64le::mysql:8.0, mecab-0.996-2.module+el8.10.0+22857+7f331edd.s390x::mysql:8.0 +44
  • RHSA-2026:23332 Released 2026-06-04 · Red Hat rating Moderate
    mysql security update
    • Red Hat Enterprise Linux AppStream (v. 9) mysql-8.0.46-1.el9_8, mysql-common-8.0.46-1.el9_8, mysql-errmsg-8.0.46-1.el9_8 +2
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) mysql-devel-8.0.46-1.el9_8, mysql-test-8.0.46-1.el9_8

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Oracle MySQL Server — oracle.com/security-alerts/cpuapr2026.html

    25 records Highest priority Priority MEDIUM 1 MEDIUM, 24 LOW

    Other records, highest priority first

    • TI-2026-26593 Uncontrolled resource consumption in Oracle MySQL ServerPriority MEDIUM 56
    • TI-2026-26597 Uncontrolled resource consumption in Oracle MySQL ServerPriority LOW 29
    • TI-2026-26592 Uncontrolled resource consumption in Oracle MySQL ServerPriority LOW 29
    Show all 25 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet
Red Hat Enterprise Linux 8AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:25919
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:23332
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:23332
Not affected: 1 product
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-34267
  2. 2026-10-03 Alias added: GHSA-3gfg-g579-3wmq

References

Advisory 1

  • TI-2021-02645 SM2 Decryption Buffer Overflow CVSS 3.1CRITICAL 9.8
  • TI-2022-01176 The c_rehash script allows command injection CVSS 3.1CRITICAL 9.8
  • TI-2021-04451 XStream is vulnerable to an Arbitrary Code Execution attack CVSS 3.1CRITICAL 9.1
  • TI-2021-04444 XStream is vulnerable to an Arbitrary Code Execution attack CVSS 3.1CRITICAL 9.8
  • TI-2021-05762 Use after free in https://github.com/curl/curl CVSS 3.1HIGH 8.1
  • TI-2021-05807 Cleartext transmission of sensitive information in https://github.com/curl/curl CVSS 3.1HIGH 7.5
See all 347 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences