CVE-2018-1336
tomcat: A bug in the UTF-8 decoder can lead to DoS
Severity
ImportantRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · July 22, 2018
Updated · November 4, 2026
Description
An improper handing of overflow in the UTF-8 decoder with supplementary characters can lead to an infinite loop in the decoder causing a Denial of Service. Versions Affected: Apache Tomcat 9.0.0.M9 to 9.0.7, 8.5.0 to 8.5.30, 8.0.0.RC1 to 8.0.51, and 7.0.28 to 7.0.86.
Statement
Fuse 6.3 and 7 standalone distributions ship but do not use tomcat, and as such are not affected by this flaw; however, Fuse Integration Services 2.0 and Fuse 7 on OpenShift provide the affected artifacts via their respective maven repositories, and will provide fixes for this issue in a future release.
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 3.0 · 7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE not specified