Apache Tomcat - AJP secret compared in non-constant time
Versions Affected: Apache Tomcat 11.0.0-M1 to 11.0.21 Apache Tomcat 10.1.0-M1 to 10.1.54 Apache Tomcat 9.0.0.M1 to 9.0.117 Older, unsupported versions may also be affected Description: The AJP secret was compared in non-constant time allowing an attacker on the local network to mount a timing attack to determine the AJP secret. Mitigation: Users of the affected versions should apply one of the following mitigations: - Upgrade to Apache Tomcat 11.0.22 or later - Upgrade to Apache Tomcat 10.1.55 or later - Upgrade to Apache Tomcat 9.0.118 or later
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-43514US | — | — | ||
Observable Timing Discrepancy vulnerability when comparing AJP secret in Apache Tomcat.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10… | ||||
references
External citations — patches, advisories, analysis.
- http://www.openwall.com/lists/oss-security/2026/05/12/10WEB
- https://github.com/apache/tomcatPACKAGE
- https://github.com/apache/tomcat/commit/933dcdbf2515972280002929e7e597dead2e9ffaWEB
- https://github.com/apache/tomcat/commit/a102a2a157868ca51d83eaf5a119ccd9976a113eWEB
- https://github.com/apache/tomcat/commit/d35d9d23263c8e4af561f615c960c91697ff200eWEB
- https://lists.apache.org/thread/2k654v5cq123npfsd1b2kk1y30owqb1mWEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-43514ADVISORY
- https://tomcat.apache.org/security-10.htmlWEB
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