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Servers and applications

CVE-2004-0837

MySQL 4.x before 4.0.21, and 3.x before 3.23.49, allows attackers to cause a denial of service (crash or hang) via multiple threads that simultaneously alter MERGE table UNIONs.

Severity
Low 2.6
Published
3 Nov 2004
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
3.23.49, 4.0.21
Exploit chance
4.9% in the next 30 daysHigher than 92% of CVEs. EPSS by FIRST, 12 Nov 2026
Attack
Over the network · Only under certain conditions · No login needed
Attacker can
Slow it down
CVSS vector
AV:N/AC:H/Au:N/C:N/I:N/A:P
Sources
NVD

Affected software

SoftwareAffected versions
MySQLServers and applications · cpe:a:oracle:mysql
  • From 3.20 before 3.23.49
  • From 4.0.0 before 4.0.21

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2004-0837
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2004-0837