CVE-2018-11759: The Apache Web Server (httpd) specific code that normalised the requested path before matching it to the URI-worker m…
- Is it exploited?
Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of .
VulnCheck KEV lists it since . It cites 709 public reports, the first from .
- How likely is exploitation in the next 30 days?
- 90.6%
EPSS score, percentile 99.8 of all scored records. A probability estimated by FIRST, not a report of exploitation.
- How severe?
- Not scored
The CVE record carries no CVSS score.
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
- Which versions are affected?
Affected
- Apache Tomcat JK (mod_jk) Connector 1.2.0 to 1.2.44
Source: CISA KEV 2026.10.29, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
Description
The Apache Web Server (httpd) specific code that normalised the requested path before matching it to the URI-worker map in Apache Tomcat JK (mod_jk) Connector 1.2.0 to 1.2.44 did not handle some edge cases correctly. If only a sub-set of the URLs supported by Tomcat were exposed via httpd, then it was possible for a specially constructed request to expose application functionality through the reverse proxy that was not intended for clients accessing the application via the reverse proxy. It was also possible in some configurations for a specially constructed request to bypass the access controls configured in httpd. While there is some overlap between this issue and CVE-2018-1323, they are not identical.
Source: CVE List, as of . About the data.
What to do
Advisories and patches
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
Versions by product, as listed in the CVE record (1 product)
| Status | Versions |
|---|---|
| Affected | Apache Tomcat JK (mod_jk) Connector 1.2.0 to 1.2.44 |
Source: CVE List, as of . About the data.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| CVE record last updated |
References
10
- 105888
- lists.apache.org
- [debian-lts-announce] 20181217 [SECURITY] [DLA 1609-1] libapache-mod-jk security update
- [tomcat-dev] 20190319 svn commit: r1855831 [26/30] - in /tomcat/site/trunk: ./ docs/ xdocs/
- [tomcat-dev] 20190325 svn commit: r1856174 [25/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/
- [tomcat-dev] 20190413 svn commit: r1857494 [18/20] - in /tomcat/site/trunk: ./ docs/ xdocs/
- [tomcat-dev] 20190415 svn commit: r1857582 [20/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/
- oracle.com
- [tomcat-dev] 20200203 svn commit: r1873527 [26/30] - /tomcat/site/trunk/docs/
1 more in the CVE record.
Known exploited Apache vulnerabilities
- CVE-2016-3081: Apache Struts Command Injection Vulnerability
- CVE-2026-34486: Apache Tomcat Missing Encryption of Sensitive Data Vulnerability
- CVE-2026-34197: Apache ActiveMQ Improper Input Validation Vulnerability
- CVE-2024-38475: Apache HTTP Server Improper Escaping of Output Vulnerability
- CVE-2025-24813: Apache Tomcat Path Equivalence Vulnerability