Medium severity5.3NVD Advisory· Published Jul 12, 2021· Updated Jun 17, 2026

CVE-2021-33037

Description

Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. Specifically: - Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; - Tomcat honoured the identify encoding; and - Tomcat did not ensure that, if present, the chunked encoding was the final encoding.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
org.apache.tomcat:tomcatMaven	>= 10.0.0-M1, < 10.0.7	10.0.7
org.apache.tomcat:tomcatMaven	>= 9.0.0-M1, < 9.0.48	9.0.48
org.apache.tomcat:tomcatMaven	>= 8.5.0, < 8.5.68	8.5.68

Affected products

Apache/Tomcat
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
Range: >=8.5.0,<=8.5.66
Apache/TomEE
cpe:2.3:a:apache:tomee:8.0.6:*:*:*:*:*:*:*
McAfee/Epolicy Orchestrator12 versions
cpe:2.3:a:mcafee:epolicy_orchestrator:*:*:*:*:*:*:*:*+ 11 more
- cpe:2.3:a:mcafee:epolicy_orchestrator:*:*:*:*:*:*:*:*range: <5.10.0
- cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:-:*:*:*:*:*:*
- cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_10:*:*:*:*:*:*
- cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_1:*:*:*:*:*:*
- cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_2:*:*:*:*:*:*
- cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_3:*:*:*:*:*:*
- cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_4:*:*:*:*:*:*
- cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_5:*:*:*:*:*:*
- cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_6:*:*:*:*:*:*
- cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_7:*:*:*:*:*:*
- cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_8:*:*:*:*:*:*
- cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_9:*:*:*:*:*:*
Oracle Corporation/Agile Plm
cpe:2.3:a:oracle:agile_plm:9.3.6:*:*:*:*:*:*:*
Oracle Corporation/Communications Cloud Native Core Policy
cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:*
Oracle Corporation/Communications Cloud Native Core Service Communication Proxy
cpe:2.3:a:oracle:communications_cloud_native_core_service_communication_proxy:1.14.0:*:*:*:*:*:*:*
Oracle Corporation/Communications Diameter Signaling Router
cpe:2.3:a:oracle:communications_diameter_signaling_router:*:*:*:*:*:*:*:*
Range: >=8.0.0.0,<=8.5.0.2
Oracle Corporation/Communications Instant Messaging Server
cpe:2.3:a:oracle:communications_instant_messaging_server:10.0.1.5.0:*:*:*:*:*:*:*
Oracle Corporation/Communications Policy Management
cpe:2.3:a:oracle:communications_policy_management:12.5.0:*:*:*:*:*:*:*
Oracle Corporation/Communications Pricing Design Center
cpe:2.3:a:oracle:communications_pricing_design_center:12.0.0.3.0:*:*:*:*:*:*:*
Oracle Corporation/Communications Session Report Manager
cpe:2.3:a:oracle:communications_session_report_manager:*:*:*:*:*:*:*:*
Range: >=8.0.0,<=8.2.4.0
Oracle Corporation/Communications Session Route Manager
cpe:2.3:a:oracle:communications_session_route_manager:*:*:*:*:*:*:*:*
Range: >=8.0.0,<=8.2.4
Oracle Corporation/Graph Server And Client
cpe:2.3:a:oracle:graph_server_and_client:*:*:*:*:*:*:*:*
Range: <21.4
Oracle Corporation/Healthcare Translational Research
cpe:2.3:a:oracle:healthcare_translational_research:4.1.0:*:*:*:*:*:*:*
Oracle Corporation/Hospitality Cruise Shipboard Property Management System
cpe:2.3:a:oracle:hospitality_cruise_shipboard_property_management_system:20.1.0:*:*:*:*:*:*:*
Oracle Corporation/Instantis Enterprisetrack3 versions
cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*
Oracle Corporation/Managed File Transfer2 versions
cpe:2.3:a:oracle:managed_file_transfer:12.2.1.3.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:oracle:managed_file_transfer:12.2.1.3.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:managed_file_transfer:12.2.1.4.0:*:*:*:*:*:*:*
Oracle Corporation/Mysql Enterprise Monitor
cpe:2.3:a:oracle:mysql_enterprise_monitor:*:*:*:*:*:*:*:*
Range: <=8.0.25
Oracle Corporation/Sd Wan Edge2 versions
cpe:2.3:a:oracle:sd-wan_edge:9.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:oracle:sd-wan_edge:9.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:sd-wan_edge:9.1:*:*:*:*:*:*:*
Oracle Corporation/Secure Global Desktop
cpe:2.3:a:oracle:secure_global_desktop:5.6:*:*:*:*:*:*:*
Oracle Corporation/Utilities Testing Accelerator3 versions
cpe:2.3:a:oracle:utilities_testing_accelerator:6.0.0.1.1:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:oracle:utilities_testing_accelerator:6.0.0.1.1:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:utilities_testing_accelerator:6.0.0.2.2:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:utilities_testing_accelerator:6.0.0.3.1:*:*:*:*:*:*:*
Debian/linux2 versions
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
osv-coords32 versions
pkg:bitnami/tomcat pkg:maven/org.apache.tomcat/tomcat pkg:rpm/opensuse/tomcat&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/tomcat&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/tomcat&distro=openSUSE%20Tumbleweed pkg:rpm/opensuse/tomcat10&distro=openSUSE%20Tumbleweed pkg:rpm/suse/javapackages-tools&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSS pkg:rpm/suse/javapackages-tools&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/javapackages-tools&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/javapackages-tools&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/javapackages-tools&distro=SUSE%20OpenStack%20Cloud%209 pkg:rpm/suse/javapackages-tools&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209 pkg:rpm/suse/tomcat&distro=SUSE%20Enterprise%20Storage%206 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Web%20and%20Scripting%2015%20SP2 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Web%20and%20Scripting%2015%20SP3 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSS pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSS pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1 pkg:rpm/suse/tomcat&distro=SUSE%20OpenStack%20Cloud%209 pkg:rpm/suse/tomcat&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209
>= 8.5.0, < 8.5.67+ 31 more
- (no CPE)range: >= 8.5.0, < 8.5.67
- (no CPE)range: >= 10.0.0-M1, < 10.0.7
- (no CPE)range: < 9.0.36-lp152.2.25.1
- (no CPE)range: < 9.0.36-13.1
- (no CPE)range: < 9.0.43-2.1
- (no CPE)range: < 10.1.14-1.1
- (no CPE)range: < 2.0.1-13.1
- (no CPE)range: < 2.0.1-13.1
- (no CPE)range: < 2.0.1-13.1
- (no CPE)range: < 2.0.1-13.1
- (no CPE)range: < 2.0.1-13.1
- (no CPE)range: < 2.0.1-13.1
- (no CPE)range: < 9.0.36-4.63.1
- (no CPE)range: < 9.0.36-4.63.1
- (no CPE)range: < 9.0.36-4.63.1
- (no CPE)range: < 9.0.36-3.84.1
- (no CPE)range: < 9.0.36-3.84.1
- (no CPE)range: < 9.0.36-13.1
- (no CPE)range: < 9.0.36-13.1
- (no CPE)range: < 9.0.36-3.71.1
- (no CPE)range: < 9.0.36-3.71.1
- (no CPE)range: < 9.0.115-3.160.1
- (no CPE)range: < 9.0.36-4.63.1
- (no CPE)range: < 9.0.36-4.63.1
- (no CPE)range: < 9.0.36-3.84.1
- (no CPE)range: < 9.0.115-3.160.1
- (no CPE)range: < 9.0.36-3.71.1
- (no CPE)range: < 9.0.36-3.71.1
- (no CPE)range: < 9.0.36-3.84.1
- (no CPE)range: < 9.0.36-4.63.1
- (no CPE)range: < 9.0.36-3.71.1
- (no CPE)range: < 9.0.36-3.71.1
Apache Software Foundation/Apache Tomcatv5
Range: Apache Tomcat 10 10.0.0-M1 to 10.0.6

Patches

Vulnerability mechanics

References

www.oracle.com//security-alerts/cpujul2021.htmlnvdPatchThird Party AdvisoryWEB
www.oracle.com/security-alerts/cpuapr2022.htmlnvdPatchThird Party AdvisoryWEB
www.oracle.com/security-alerts/cpujan2022.htmlnvdPatchThird Party AdvisoryWEB
www.oracle.com/security-alerts/cpuoct2021.htmlnvdPatchThird Party AdvisoryWEB
github.com/advisories/GHSA-4vww-mc66-62m6ghsaADVISORY
kc.mcafee.com/corporate/indexnvdThird Party AdvisoryWEB
lists.apache.org/thread.html/r612a79269b0d5e5780c62dfd34286a8037232fec0bc6f1a7e60c9381%40%3Cannounce.tomcat.apache.org%3EnvdMailing ListVendor AdvisoryWEB
lists.debian.org/debian-lts-announce/2021/08/msg00009.htmlnvdMailing ListThird Party AdvisoryWEB
nvd.nist.gov/vuln/detail/CVE-2021-33037ghsaADVISORY
security.gentoo.org/glsa/202208-34nvdThird Party AdvisoryWEB
security.netapp.com/advisory/ntap-20210827-0007/nvdThird Party Advisory
www.debian.org/security/2021/dsa-4952nvdThird Party AdvisoryWEB
github.com/apache/tomcat/commit/05f9e8b00f5d9251fcd3c95dcfd6cf84177f46c8ghsaWEB
github.com/apache/tomcat/commit/19d11556d0db99df291df33605f137976d152475ghsaWEB
github.com/apache/tomcat/commit/3202703e6d635e39b74262e81f0cb4bcbe2170dcghsaWEB
github.com/apache/tomcat/commit/45d70a86a901cbd534f8f570bed2aec9f7f7b88eghsaWEB
github.com/apache/tomcat/commit/506134f957a4be2c5b4a9334f7b3435fc954dbc1ghsaWEB
github.com/apache/tomcat/commit/8874fa02e9b36baa9ca6b226c0882c0190ca5a02ghsaWEB
github.com/apache/tomcat/commit/a2c3dc4c96168743ac0bab613709a5bbdaec41d0ghsaWEB
github.com/apache/tomcat/commit/da0e7cb093cf68b052d9175e469dbd0464441b0bghsaWEB
github.com/apache/tomcat/commit/eee0d024c1b3171560c92eaba79dd6eb8eb11bcdghsaWEB
lists.apache.org/thread.html/r290aee55b72811fd19e75ac80f6143716c079170c5671b96932ed44b@%3Ccommits.tomee.apache.org%3EghsaWEB
lists.apache.org/thread.html/r40f921575aee8d7d34e53182f862c45cbb8f3d898c9d4e865c2ec262@%3Ccommits.tomee.apache.org%3EghsaWEB
lists.apache.org/thread.html/rc6ef52453bb996a98cb45442871a1db56b7c349939e45d829bf9ae37@%3Ccommits.tomee.apache.org%3EghsaWEB
lists.apache.org/thread.html/rd0dfea39829bc0606c936a16f6fca338127c86c0a1083970b45ac8d2@%3Ccommits.tomee.apache.org%3EghsaWEB
lists.apache.org/thread.html/re01e7e93154e8bdf78a11a23f9686427bd3d51fc6e12c508645567b7@%3Ccommits.tomee.apache.org%3EghsaWEB
lists.apache.org/thread.html/rf1b54fd3f52f998ca4829159a88cc4c23d6cef5c6447d00948e75c97@%3Ccommits.tomee.apache.org%3EghsaWEB
lists.apache.org/thread/kovg1bft77xo34ksrcskh5nl50p69962ghsaWEB
security.netapp.com/advisory/ntap-20210827-0007ghsaWEB
tomcat.apache.org/security-10.htmlghsaWEB
tomcat.apache.org/security-8.htmlghsaWEB
tomcat.apache.org/security-9.htmlghsaWEB
lists.apache.org/thread.html/r290aee55b72811fd19e75ac80f6143716c079170c5671b96932ed44b%40%3Ccommits.tomee.apache.org%3Envd
lists.apache.org/thread.html/r40f921575aee8d7d34e53182f862c45cbb8f3d898c9d4e865c2ec262%40%3Ccommits.tomee.apache.org%3Envd
lists.apache.org/thread.html/rc6ef52453bb996a98cb45442871a1db56b7c349939e45d829bf9ae37%40%3Ccommits.tomee.apache.org%3Envd
lists.apache.org/thread.html/rd0dfea39829bc0606c936a16f6fca338127c86c0a1083970b45ac8d2%40%3Ccommits.tomee.apache.org%3Envd
lists.apache.org/thread.html/re01e7e93154e8bdf78a11a23f9686427bd3d51fc6e12c508645567b7%40%3Ccommits.tomee.apache.org%3Envd
lists.apache.org/thread.html/rf1b54fd3f52f998ca4829159a88cc4c23d6cef5c6447d00948e75c97%40%3Ccommits.tomee.apache.org%3Envd

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cvss	0.345
epss	0.060
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000