CVE-2026-101356
9.1CriticalPublished 20 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Impact
- High impact on confidentiality, availability
- Weakness
- CWE-362
Impact
Unauthenticated remote attackers can capture other users' requests or responses, leaking sensitive data or causing denial of service. They only need network access to the exposed HTTP/2 service.
Root cause
Flawed object recycling and reuse during HTTP/2 asynchronous servlet processing causes request and response mix-ups across different connections.
Affected systems
Apache Tomcat 11.0.22 through 11.0.26, 10.1.55 through 10.1.60, and 9.0.118 through 9.0.122
CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Fix & remediation
Upgrade to Apache Tomcat 11.0.27, 10.1.61, or 9.0.123 depending on your release branch. No interim configuration mitigation is specified, so prioritize patching.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
Incorrect object recycling and re-use vulnerability in Apache Tomcat affecting HTTP/2 processing of asynchronous servlets can trigger request and/or response mix-up between users. This issue affects Apache Tomcat: from 11.0.22 through 11.0.26, from 10.1.55 through 10.1.60, from 9.0.118 through 9.0.122. Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fixes the issue.