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CVE-2018-8037

26
FAUCET Score

CVE-2018-8037 is a race condition vulnerability in Apache Tomcat versions 9.0.0.M9 to 9.0.9 and 8.5.5 to 8.5.31. This flaw could lead to information disclosure, where a user might receive a response intended for another user due to simultaneous async request completion and container timeout. Rated as Medium severity (CVSS 5.9), it has a network attack vector and high attack complexity, with potential for high confidentiality impact. There is no evidence of active exploitation, public exploit code, or Metasploit/Nuclei modules, and community discussion is minimal, though it has received some media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 8.5.5, <= 8.5.31CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
>= 9.0.1, <= 9.0.9CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
9.0.0CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:9.0.0:*:*:*:*:*:*:*
9.0.0CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:9.0.0:milestone10:*:*:*:*:*:*
9.0.0CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:9.0.0:milestone11:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
12.06%
Probability of exploitation in next 30 days
EPSS Percentile
95.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1206 is in the 96th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

mavenpatch availablevia ghsa
Product: org.apache.tomcat.embed:tomcat-embed-coreFixed in: 8.5.32
mavenpatch availablevia ghsa
Product: org.apache.tomcat.embed:tomcat-embed-coreFixed in: 9.0.10
oraclepatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: pki-deps:10.6-8000020190524054914.55190bc5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Web Server 5.0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Web Server 5.0 on RHEL 6Fixed in: jws5-tomcat-0:9.0.7-12.redhat_12.1.el6jws
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Web Server 5.0 on RHEL 7Fixed in: jws5-tomcat-0:9.0.7-12.redhat_12.1.el7jws
View patch
redhatno patchvia redhat_api
Product: Red Hat OpenShift Application RuntimesFixed in: tomcat

Vendor Advisories (2)

mavenGHSA-6v52-mj5r-7j2mmedium

Apache Tomcat Race Condition vulnerability

Oct 17, 2018
redhatCVE-2018-8037Important

tomcat: Due to a mishandling of close in NIO/NIO2 connectors user sessions can get mixed up

Jul 22, 2018

References

mail-archives.us.apache.org / mod_mbox/www-announce/201807.mbox/%3C20180722090623.GA92700%40minotaur.apache.org%3E
Mailing ListVendor Advisory
mail-archives.us.apache.org / mod_mbox/www-announce/201808.mbox/%3C0c616b4d-4e81-e7f8-b81d-1bb4c575aa33%40apache.org%3E
Mailing ListVendor Advisory
access.redhat.com / errata/RHSA-2018:2867
Third Party Advisory
access.redhat.com / errata/RHSA-2018:2868
Third Party Advisory
access.redhat.com / errata/RHSA-2019:1529
lists.apache.org / thread.html/1dd0a59c1295cc08ce4c9e7edae5ad2268acc9ba55adcefa0532e5ba%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/2ee3af8a43cb019e7898c9330cc8e73306553a27f2e4735dfb522d39%40%3Cusers.tomcat.apache.org%3E
lists.apache.org / thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/5c0e00fd31efc11e147bf99d0f03c00a734447d3b131ab0818644cdb%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/5d15316dfb4adf75d96d394745f8037533fa3bcc1ac8f619bf5c044c%40%3Cusers.tomcat.apache.org%3E
lists.apache.org / thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/e85e83e9954f169bbb77b44baae5a33d8de878df557bb32b7f793661%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/eb6efa8d59c45a7a9eff94c4b925467d3b3fec8ba7697f3daa314b04%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a%40%3Cdev.tomcat.apache.org%3E
security.netapp.com / advisory/ntap-20180817-0001
Third Party Advisory
debian.org / security/2018/dsa-4281
Third Party Advisory
oracle.com / security-alerts/cpuapr2020.html
oracle.com / technetwork/security-advisory/cpuoct2019-5072832.html
oracle.com / technetwork/security-advisory/cpuoct2018-4428296.html
PatchThird Party Advisory
securityfocus.com / bid/104894
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041376
Third Party AdvisoryVDB Entry