Replay Attack Affecting org.apache.tomcat:tomcat package, versions [9.0.0.M1,9.0.121)[11.0.0-M1,10.1.59)[11.0.0-M1,11.0.25)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-ORGAPACHETOMCAT-20302849
- published30 Sept 2026
- disclosed26 Aug 2026
- credit4ra1n, pyn3rd, unam4
Introduced: 26 Aug 2026
CVE-2026-65905 (opens in a new tab)How to fix?
Upgrade org.apache.tomcat:tomcat to version 9.0.121, 10.1.59, 11.0.25 or higher.
Overview
org.apache.tomcat:tomcat is an implementation of the Java Servlet, JavaServer Pages, Java Expression Language and Java WebSocket technologies.
Affected versions of this package are vulnerable to Replay Attack in the DIGEST authenticator’s nonce-count window handling. An attacker can reuse a valid DIGEST-authenticated request once by sending a request with a nonce count at the upper boundary of the replay window before the window has filled. This allows a captured authentication message to be replayed successfully within the same nonce-count window, letting the attacker impersonate an authenticated user and perform requests accepted as that user.
Notes
- The issue was fixed in Apache Tomcat 10.1.58, but the release vote for the 10.1.58 release candidate did not pass. Therefore, although users must download 10.1.59 to obtain a version that includes a fix for this issue, version 10.1.58 is not included in the list of affected versions.