UpHeron
All vulnerabilities

Servers and applications

CVE-2011-4858

Apache Tomcat before 5.5.35, 6.x before 6.0.35, and 7.x before 7.0.23 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.

Severity
Medium 5.0
Published
5 Jan 2012
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
80% in the next 30 daysHigher than 99% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
CWE-399
Attack
Over the network · No login needed
Attacker can
Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Sources
NVD

Affected software

SoftwareAffected versions
Apache TomcatServers and applications · cpe:a:apache:tomcat
  • Version 7.0.22
  • Version 7.0.21
  • Version 7.0.20
  • Version 7.0.19
All 59 release lines
  • Version 5.5.35
  • Version 6.0.0
  • Version 6.0.1
  • Version 6.0.2
  • Version 6.0.3
  • Version 6.0.4
  • Version 6.0.5
  • Version 6.0.6
  • Version 6.0.7
  • Version 6.0.8
  • Version 6.0.9
  • Version 6.0.10
  • Version 6.0.11
  • Version 6.0.12
  • Version 6.0.13
  • Version 6.0.14
  • Version 6.0.15
  • Version 6.0.16
  • Version 6.0.17
  • Version 6.0.18
  • Version 6.0.19
  • Version 6.0.20
  • Version 6.0.21
  • Version 6.0.22
  • Version 6.0.23
  • Version 6.0.24
  • Version 6.0.25
  • Version 6.0.26
  • Version 6.0.27
  • Version 6.0.28
  • Version 6.0.29
  • Version 6.0.30
  • Version 6.0.31
  • Version 6.0.32
  • Version 6.0.33
  • Version 6.0.34
  • Version 7.0.0
  • Version 7.0.1
  • Version 7.0.2
  • Version 7.0.3
  • Version 7.0.4
  • Version 7.0.5
  • Version 7.0.6
  • Version 7.0.7
  • Version 7.0.8
  • Version 7.0.9
  • Version 7.0.10
  • Version 7.0.11
  • Version 7.0.12
  • Version 7.0.13
  • Version 7.0.14
  • Version 7.0.15
  • Version 7.0.16
  • Version 7.0.17
  • Version 7.0.18
  • Version 7.0.19
  • Version 7.0.20
  • Version 7.0.21
  • Version 7.0.22

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2011-4858
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2011-4858