The CORS Filter in Apache Tomcat 9.0.0.M1 to 9.0.0.M21, 8.5.0 to 8.5.15, 8.0.0.RC1 to 8.0.44 and 7.0.41 to 7.0.78 did not add an HTTP Vary…

Description

The CORS Filter in Apache Tomcat 9.0.0.M1 to 9.0.0.M21, 8.5.0 to 8.5.15, 8.0.0.RC1 to 8.0.44 and 7.0.41 to 7.0.78 did not add an HTTP Vary header indicating that the response varies depending on Origin. This permitted client and server side cache poisoning in some circumstances.

Scores

EPSS (exploitation in 30 days)

8.0% · top 5.2% of all CVEs (3 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.

Weakness

• Cache Poisoning
• CWE-345 (opens in a new tab)All about CWE-345 and its CVEs

Affected products

• Apache Software Foundation · Apache Tomcat

  • affected 9.0.0.M1 to 9.0.0.M21
  • affected 8.5.0 to 8.5.15
  • affected 8.0.0.RC1 to 8.0.44
  • affected 7.0.41 to 7.0.78

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• Mavenorg.apache.tomcat:tomcatGHSA-73rx-3f9r-x949 (opens in a new tab)

References (29)

• https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03828en_us (opens in a new tab)x_refsource_CONFIRMx_transferred
• RHSA-2017:1801 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• [announce] 20170810 [SECURITY] CVE-2017-7674 Apache Tomcat Cache Poisoning (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• https://security.netapp.com/advisory/ntap-20180614-0003/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• 100280 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• DSA-3974 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• [debian-lts-announce] 20180627 [SECURITY] [DLA 1400-1] tomcat7 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• RHSA-2017:1802 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2017:3081 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• [tomcat-dev] 20190319 svn commit: r1855831 [24/30] - in /tomcat/site/trunk: ./ docs/ xdocs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190319 svn commit: r1855831 [25/30] - in /tomcat/site/trunk: ./ docs/ xdocs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190325 svn commit: r1856174 [22/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190325 svn commit: r1856174 [23/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190325 svn commit: r1856174 [24/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190413 svn commit: r1857494 [17/20] - in /tomcat/site/trunk: ./ docs/ xdocs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190413 svn commit: r1857496 [3/4] - in /tomcat/site/trunk: ./ docs/ xdocs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190413 svn commit: r1857494 [16/20] - in /tomcat/site/trunk: ./ docs/ xdocs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190415 svn commit: r1857582 [18/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190415 svn commit: r1857582 [17/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190415 svn commit: r1857582 [19/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-users] 20200131 Re: 7.0.59 to 7.0.99 upgrade, CVE-2015-5174 fix prevents us from accessing resources outside context (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20200203 svn commit: r1873527 [24/30] - /tomcat/site/trunk/docs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20200203 svn commit: r1873527 [25/30] - /tomcat/site/trunk/docs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-users] 20200203 Re: 7.0.59 to 7.0.99 upgrade, CVE-2015-5174 fix prevents us from accessing resources outside context (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-users] 20200204 Re: 7.0.59 to 7.0.99 upgrade, CVE-2015-5174 fix prevents us from accessing resources outside context (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20200213 svn commit: r1873980 [27/34] - /tomcat/site/trunk/docs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20200213 svn commit: r1873980 [28/34] - /tomcat/site/trunk/docs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20200213 svn commit: r1873980 [29/34] - /tomcat/site/trunk/docs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-73rx-3f9r-x949 (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2017-7674](https://trackcve.app/badge/CVE-2017-7674.svg)](https://trackcve.app/cve/CVE-2017-7674)

Record last updated 15 Oct 2026, 15:58 UTC.