Vulnerability · Published Apr 9, 2026 · Assigned by apache
CVE-2026-25854Apache Tomcat: Occasionally open redirect
Medium 6.1
In plain English
A medium-severity open redirect in Apache Tomcat from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.6%top 52.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official description
Occasional URL redirection to untrusted Site ('Open Redirect') vulnerability in Apache Tomcat via the LoadBalancerDrainingValve. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M23 through 9.0.115, from 8.5.30 through 8.5.100. Other, unsupported versions may also be affected Users are recommended to upgrade to version 11.0.20, 10.1.53 or 9.0.116, which fix the issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | tomcat | 1:9.0.120-1.el8_10 | ALSA-2026:68677 |
| AlmaLinux:9 | tomcat | 1:9.0.117-1.el9_8 | ALSA-2026:26323 |
| AlmaLinux:8 | tomcat-admin-webapps | 1:9.0.120-1.el8_10 | ALSA-2026:68677 |
| AlmaLinux:9 | tomcat-admin-webapps | 1:9.0.117-1.el9_8 | ALSA-2026:26323 |
| AlmaLinux:8 | tomcat-docs-webapp | 1:9.0.120-1.el8_10 | ALSA-2026:68677 |
| AlmaLinux:9 | tomcat-docs-webapp | 1:9.0.117-1.el9_8 | ALSA-2026:26323 |
| AlmaLinux:8 | tomcat-el-3.0-api | 1:9.0.120-1.el8_10 | ALSA-2026:68677 |
| AlmaLinux:9 | tomcat-el-3.0-api | 1:9.0.117-1.el9_8 | ALSA-2026:26323 |
| AlmaLinux:8 | tomcat-jsp-2.3-api | 1:9.0.120-1.el8_10 | ALSA-2026:68677 |
| AlmaLinux:9 | tomcat-jsp-2.3-api | 1:9.0.117-1.el9_8 | ALSA-2026:26323 |
| AlmaLinux:8 | tomcat-lib | 1:9.0.120-1.el8_10 | ALSA-2026:68677 |
| AlmaLinux:9 | tomcat-lib | 1:9.0.117-1.el9_8 | ALSA-2026:26323 |
| AlmaLinux:8 | tomcat-servlet-4.0-api | 1:9.0.120-1.el8_10 | ALSA-2026:68677 |
| AlmaLinux:9 | tomcat-servlet-4.0-api | 1:9.0.117-1.el9_8 | ALSA-2026:26323 |
| AlmaLinux:8 | tomcat-webapps | 1:9.0.120-1.el8_10 | ALSA-2026:68677 |
| AlmaLinux:9 | tomcat-webapps | 1:9.0.117-1.el9_8 | ALSA-2026:26323 |
| AlmaLinux:10 | tomcat9 | 1:9.0.117-1.el10_2.alma.1 | ALSA-2026:25341 |
| AlmaLinux:10 | tomcat9 | 1:9.0.117-2.el10_2.alma.1 | ALSA-2026:36790 |
| AlmaLinux:10 | tomcat9-admin-webapps | 1:9.0.117-1.el10_2.alma.1 | ALSA-2026:25341 |
| AlmaLinux:10 | tomcat9-admin-webapps | 1:9.0.117-2.el10_2.alma.1 | ALSA-2026:36790 |
| AlmaLinux:10 | tomcat9-docs-webapp | 1:9.0.117-2.el10_2.alma.1 | ALSA-2026:36790 |
| AlmaLinux:10 | tomcat9-docs-webapp | 1:9.0.117-1.el10_2.alma.1 | ALSA-2026:25341 |
| AlmaLinux:10 | tomcat9-el-3.0-api | 1:9.0.117-1.el10_2.alma.1 | ALSA-2026:25341 |
| AlmaLinux:10 | tomcat9-el-3.0-api | 1:9.0.117-2.el10_2.alma.1 | ALSA-2026:36790 |
| AlmaLinux:10 | tomcat9-jsp-2.3-api | 1:9.0.117-1.el10_2.alma.1 | ALSA-2026:25341 |
| AlmaLinux:10 | tomcat9-jsp-2.3-api | 1:9.0.117-2.el10_2.alma.1 | ALSA-2026:36790 |
| AlmaLinux:10 | tomcat9-lib | 1:9.0.117-1.el10_2.alma.1 | ALSA-2026:25341 |
| AlmaLinux:10 | tomcat9-lib | 1:9.0.117-2.el10_2.alma.1 | ALSA-2026:36790 |
| AlmaLinux:10 | tomcat9-servlet-4.0-api | 1:9.0.117-2.el10_2.alma.1 | ALSA-2026:36790 |
| AlmaLinux:10 | tomcat9-servlet-4.0-api | 1:9.0.117-1.el10_2.alma.1 | ALSA-2026:25341 |
| AlmaLinux:10 | tomcat9-webapps | 1:9.0.117-1.el10_2.alma.1 | ALSA-2026:25341 |
| AlmaLinux:10 | tomcat9-webapps | 1:9.0.117-2.el10_2.alma.1 | ALSA-2026:36790 |
| Debian:12 | tomcat10 | 10.1.55-1~deb12u1 | DEBIAN-CVE-2026-25854 |
| Debian:13 | tomcat10 | 10.1.55-1~deb13u1 | DEBIAN-CVE-2026-25854 |
| Debian:14 | tomcat10 | 10.1.54-1 | DEBIAN-CVE-2026-25854 |
| Debian:13 | tomcat11 | 11.0.22-1~deb13u1 | DEBIAN-CVE-2026-25854 |
| Debian:14 | tomcat11 | 11.0.21-1 | DEBIAN-CVE-2026-25854 |
| Debian:12 | tomcat9 | 9.0.70-2 | DEBIAN-CVE-2026-25854 |
| Debian:13 | tomcat9 | 9.0.70-2 | DEBIAN-CVE-2026-25854 |
| Debian:14 | tomcat9 | 9.0.70-2 | DEBIAN-CVE-2026-25854 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | 10.1.53 | GHSA-9m3c-qcxr-9x87 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | 11.0.20 | GHSA-9m3c-qcxr-9x87 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | 9.0.116 | GHSA-9m3c-qcxr-9x87 |
| Maven | org.apache.tomcat:tomcat | 9.0.116 | GHSA-9m3c-qcxr-9x87 |
| Maven | org.apache.tomcat:tomcat | 10.1.53 | GHSA-9m3c-qcxr-9x87 |
| Maven | org.apache.tomcat:tomcat | 11.0.20 | GHSA-9m3c-qcxr-9x87 |
| Maven | org.apache.tomcat:tomcat-catalina | 11.0.20 | GHSA-9m3c-qcxr-9x87 |
| Maven | org.apache.tomcat:tomcat-catalina | 10.1.53 | GHSA-9m3c-qcxr-9x87 |
| Maven | org.apache.tomcat:tomcat-catalina | 9.0.116 | GHSA-9m3c-qcxr-9x87 |
| Rocky Linux:10 | tomcat9 | 1:9.0.117-1.el10_2 | RLSA-2026:25341 |
| Ubuntu:24.04:LTS | tomcat10 | no fix listed | UBUNTU-CVE-2026-25854 |
| Ubuntu:25.10 | tomcat10 | no fix listed | UBUNTU-CVE-2026-25854 |
| Ubuntu:26.04:LTS | tomcat10 | no fix listed | UBUNTU-CVE-2026-25854 |
| Ubuntu:25.10 | tomcat11 | no fix listed | UBUNTU-CVE-2026-25854 |
| Ubuntu:26.04:LTS | tomcat11 | no fix listed | UBUNTU-CVE-2026-25854 |
| Ubuntu:24.04:LTS | tomcat9 | no fix listed | UBUNTU-CVE-2026-25854 |
| Ubuntu:25.10 | tomcat9 | no fix listed | UBUNTU-CVE-2026-25854 |
| Ubuntu:26.04:LTS | tomcat9 | no fix listed | UBUNTU-CVE-2026-25854 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache Tomcat | 11.0.0-M1 – through 11.0.1810.1.0-M1 – through 10.1.529.0.0.M23 – through 9.0.1158.5.30 – through 8.5.100 |
Weakness: CWE-601 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N