Log in Start free

Vulnerability · Published Aug 25, 2026 · Assigned by apache

CVE-2026-65905Apache Tomcat: Limited replay attack possible with DIGEST authentication

Critical 9.8

In plain English

A critical-severity security flaw 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 0.8% (higher than 55% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.8%top 44.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Authentication Bypass by Capture-replay vulnerability in Apache Tomcat's DIGEST authenticator. If, before windowSize requests have been made, a client makes a DIGEST authenticated request with a nonceCount on the upper boundary of the replay window then that request is replayable once only while the associated nonceCount remains within the replay window.   This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.30 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8tomcat1:9.0.121-1.el8_10ALSA-2026:92869
AlmaLinux:9tomcat1:9.0.121-1.el9_8ALSA-2026:93469
AlmaLinux:8tomcat-admin-webapps1:9.0.121-1.el8_10ALSA-2026:92869
AlmaLinux:9tomcat-admin-webapps1:9.0.121-1.el9_8ALSA-2026:93469
AlmaLinux:8tomcat-docs-webapp1:9.0.121-1.el8_10ALSA-2026:92869
AlmaLinux:9tomcat-docs-webapp1:9.0.121-1.el9_8ALSA-2026:93469
AlmaLinux:8tomcat-el-3.0-api1:9.0.121-1.el8_10ALSA-2026:92869
AlmaLinux:9tomcat-el-3.0-api1:9.0.121-1.el9_8ALSA-2026:93469
AlmaLinux:8tomcat-jsp-2.3-api1:9.0.121-1.el8_10ALSA-2026:92869
AlmaLinux:9tomcat-jsp-2.3-api1:9.0.121-1.el9_8ALSA-2026:93469
AlmaLinux:8tomcat-lib1:9.0.121-1.el8_10ALSA-2026:92869
AlmaLinux:9tomcat-lib1:9.0.121-1.el9_8ALSA-2026:93469
AlmaLinux:8tomcat-servlet-4.0-api1:9.0.121-1.el8_10ALSA-2026:92869
AlmaLinux:9tomcat-servlet-4.0-api1:9.0.121-1.el9_8ALSA-2026:93469
AlmaLinux:8tomcat-webapps1:9.0.121-1.el8_10ALSA-2026:92869
AlmaLinux:9tomcat-webapps1:9.0.121-1.el9_8ALSA-2026:93469
Debian:12tomcat10no fix listedDEBIAN-CVE-2026-65905
Debian:13tomcat10no fix listedDEBIAN-CVE-2026-65905
Debian:14tomcat1010.1.60-1DEBIAN-CVE-2026-65905
Debian:13tomcat11no fix listedDEBIAN-CVE-2026-65905
Debian:14tomcat11no fix listedDEBIAN-CVE-2026-65905
Debian:12tomcat99.0.70-2DEBIAN-CVE-2026-65905
Debian:13tomcat99.0.70-2DEBIAN-CVE-2026-65905
Debian:14tomcat99.0.70-2DEBIAN-CVE-2026-65905
Mavenorg.apache.tomcat.embed:tomcat-embed-coreno fix listedGHSA-9xv2-5v5q-p794
Mavenorg.apache.tomcat.embed:tomcat-embed-coreno fix listedGHSA-9xv2-5v5q-p794
Mavenorg.apache.tomcat.embed:tomcat-embed-core11.0.25GHSA-9xv2-5v5q-p794
Mavenorg.apache.tomcat.embed:tomcat-embed-core10.1.58GHSA-9xv2-5v5q-p794
Mavenorg.apache.tomcat.embed:tomcat-embed-core9.0.121GHSA-9xv2-5v5q-p794
Mavenorg.apache.tomcat:tomcatno fix listedGHSA-9xv2-5v5q-p794
Mavenorg.apache.tomcat:tomcatno fix listedGHSA-9xv2-5v5q-p794
Mavenorg.apache.tomcat:tomcat11.0.25GHSA-9xv2-5v5q-p794
Mavenorg.apache.tomcat:tomcat10.1.58GHSA-9xv2-5v5q-p794
Mavenorg.apache.tomcat:tomcat9.0.121GHSA-9xv2-5v5q-p794
Mavenorg.apache.tomcat:tomcat-catalina9.0.121GHSA-9xv2-5v5q-p794
Mavenorg.apache.tomcat:tomcat-catalinano fix listedGHSA-9xv2-5v5q-p794
Mavenorg.apache.tomcat:tomcat-catalina11.0.25GHSA-9xv2-5v5q-p794
Mavenorg.apache.tomcat:tomcat-catalina10.1.58GHSA-9xv2-5v5q-p794
Mavenorg.apache.tomcat:tomcat-catalinano fix listedGHSA-9xv2-5v5q-p794
Rocky Linux:8tomcat1:9.0.121-1.el8_10RLSA-2026:92869
Rocky Linux:9tomcat1:9.0.121-1.el9_8RLSA-2026:93469
Ubuntu:24.04:LTStomcat10no fix listedUBUNTU-CVE-2026-65905
Ubuntu:26.04:LTStomcat10no fix listedUBUNTU-CVE-2026-65905
Ubuntu:26.10tomcat10no fix listedUBUNTU-CVE-2026-65905
Ubuntu:26.04:LTStomcat11no fix listedUBUNTU-CVE-2026-65905
Ubuntu:26.10tomcat11no fix listedUBUNTU-CVE-2026-65905
Ubuntu:24.04:LTStomcat9no fix listedUBUNTU-CVE-2026-65905
Ubuntu:26.04:LTStomcat9no fix listedUBUNTU-CVE-2026-65905
Ubuntu:26.10tomcat9no fix listedUBUNTU-CVE-2026-65905

Affected products (as reported)

VendorProductVersions
Apache Software Foundation Apache Tomcat 11.0.0-M1 – through 11.0.2410.1.0-M1 – through 10.1.579.0.0.M1 – through 9.0.1208.5.0 – through 8.5.1007.0.30 – through 7.0.109

Weakness: CWE-294 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References