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Vulnerability record · CVE-2018-1336 · published 2 August 2018

CVE-2018-1336: Apache tomcat vulnerability

Apache · Tomcat

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.

7.5 CVSS 3.1 High EPSS 21% · top 2.6% CWE-835 · CWE-835
7.5CVSS 3.1 base score, v2 5.0
21%EPSS exploitation probability, 30 days
NoNot in CISA KEV
8Affected product versions listed by NVD
76References
17 Jun 2026Last modified by NVD

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.

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

Affected products

8 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://mail-archives.us.apache.org/mod_mbox/www-announce/201807.mbox/%3C20180722090435.GA60759%40minotaur.apache.org%3E Mailing ListVendor Advisory
http://www.securityfocus.com/bid/104898 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041375 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHEA-2018:2188 Third Party Advisory
https://access.redhat.com/errata/RHEA-2018:2189 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2700 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2701 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2740 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2741 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2742 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2743 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2921 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2930 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2939 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2945 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3768 Third Party Advisory
https://lists.apache.org/thread.html/1dd0a59c1295cc08ce4c9e7edae5ad2268acc9ba55adcefa0532e5ba%40%3Cdev.tomcat.apache.org
https://lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org
https://lists.apache.org/thread.html/388a323769f1dff84c9ec905455aa73fbcb20338e3c7eb131457f708%40%3Cdev.tomcat.apache.org
https://lists.apache.org/thread.html/3d19773b4cf0377db62d1e9328bf9160bf1819f04f988315086931d7%40%3Cdev.tomcat.apache.org
https://lists.apache.org/thread.html/5c0e00fd31efc11e147bf99d0f03c00a734447d3b131ab0818644cdb%40%3Cdev.tomcat.apache.org
https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org
https://lists.apache.org/thread.html/845312a10aabbe2c499fca94003881d2c79fc993d85f34c1f5c77424%40%3Cdev.tomcat.apache.org
https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org
https://lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org
https://lists.apache.org/thread.html/e85e83e9954f169bbb77b44baae5a33d8de878df557bb32b7f793661%40%3Cdev.tomcat.apache.org
https://lists.apache.org/thread.html/eb6efa8d59c45a7a9eff94c4b925467d3b3fec8ba7697f3daa314b04%40%3Cdev.tomcat.apache.org
https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d%40%3Cdev.tomcat.apache.or
https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0%40%3Cdev.tomcat.apache.or
https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9%40%3Cdev.tomcat.apache.or
https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.or
https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a%40%3Cdev.tomcat.apache.or
https://lists.debian.org/debian-lts-announce/2018/09/msg00001.html Third Party Advisory
https://security.netapp.com/advisory/ntap-20180817-0001/ Third Party Advisory
https://support.f5.com/csp/article/K73008537?utm_source=f5support&amp%3Butm_medium=RSS
https://usn.ubuntu.com/3723-1/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4281 Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2020.html
http://mail-archives.us.apache.org/mod_mbox/www-announce/201807.mbox/%3C20180722090435.GA60759%40minotaur.apache.org%3E Mailing ListVendor Advisory
http://www.securityfocus.com/bid/104898 Third Party AdvisoryVDB Entry

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Source: NIST National Vulnerability Database (record CVE-2018-1336), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.