Executive brief
Apache Tomcat, a widely used web server for Java applications, contains a security flaw that fails to properly encrypt sensitive data during internal communication. This vulnerability could allow an attacker to bypass security controls intended to protect data in transit, potentially leading to the exposure of confidential information. Organizations should upgrade to the latest patched versions to ensure their data remains encrypted and secure.
Technical details
A vulnerability in Apache Tomcat (CWE-311) arises from an incomplete fix for a previous issue (CVE-2026-29146), which allows an attacker to bypass the EncryptInterceptor. The EncryptInterceptor is responsible for encrypting sensitive data within a Tomcat cluster; its bypass means that sensitive information may be transmitted in plaintext or otherwise accessed without authorization. The vulnerability is reachable over the network without authentication. Affected versions include 11.0.20, 10.1.53, and 9.0.116. Users are advised to upgrade to 11.0.21, 10.1.54, or 9.0.117.
Affected products
- Apache Tomcat 11.0.20, 10.1.53, 9.0.116
Timeline
- 2026-08-04: advisory: Initial NVD publication date
- 2026-08-04: exploited: Reported as exploited in the wild in the advisory summary