UpHeron
All vulnerabilities

Servers and applications

CVE-2011-2526

Apache Tomcat 5.5.x before 5.5.34, 6.x before 6.0.33, and 7.x before 7.0.19, when sendfile is enabled for the HTTP APR or HTTP NIO connector, does not validate certain request attributes, which allows local users to bypass intended file access restrictions or cause a denial of service (infinite loop or JVM crash) by leveraging an untrusted web application.

Severity
Medium 4.4
Published
14 Jul 2011
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
0.7% in the next 30 daysHigher than 53% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Improper input validation (CWE-20)
Attack
Needs local access · No login needed
Attacker can
Read some data · Change some data · Slow it down
CVSS vector
AV:L/AC:M/Au:N/C:P/I:P/A:P
Sources
NVD

Affected software

SoftwareAffected versions
Apache TomcatServers and applications · cpe:a:apache:tomcat
  • Version 7.0.17
  • Version 7.0.14
  • Version 7.0.12
  • Version 7.0.11
All 79 release lines
  • Version 5.5.0
  • Version 5.5.1
  • Version 5.5.2
  • Version 5.5.3
  • Version 5.5.4
  • Version 5.5.5
  • Version 5.5.6
  • Version 5.5.7
  • Version 5.5.8
  • Version 5.5.9
  • Version 5.5.10
  • Version 5.5.11
  • Version 5.5.12
  • Version 5.5.13
  • Version 5.5.14
  • Version 5.5.15
  • Version 5.5.16
  • Version 5.5.17
  • Version 5.5.18
  • Version 5.5.19
  • Version 5.5.20
  • Version 5.5.21
  • Version 5.5.22
  • Version 5.5.23
  • Version 5.5.24
  • Version 5.5.25
  • Version 5.5.26
  • Version 5.5.27
  • Version 5.5.28
  • Version 5.5.29
  • Version 5.5.30
  • Version 5.5.31
  • Version 5.5.32
  • Version 5.5.33
  • Version 6.0
  • 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 6.0.24
  • 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 7.0.0-beta
  • 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 7.0.14
  • Version 7.0.17

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2011-2526
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2011-2526