CVE-2026-77762

tomcat: Apache Tomcat: Race condition allows HTTP/2 request manipulation

Loading…

Severity

Low

Red Hat Product Security

6.5

CVSS 3.1

Review impact separately from score.

Published · September 23, 2026

Updated · October 8, 2026

Description

A flaw was found in Apache Tomcat. This vulnerability, caused by a race condition during concurrent execution, allows an attacker to inject unauthorized data, known as trailer fields, into another user's HTTP/2 request. This could lead to the manipulation of web traffic or unintended information disclosure.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CWE-821 · Incorrect Synchronization