Medium severity4.8NVD Advisory· Published Feb 24, 2020· Updated Jun 17, 2026

CVE-2020-1935

Description

In Apache Tomcat 9.0.0.M1 to 9.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99 the HTTP header parsing code used an approach to end-of-line parsing that allowed some invalid HTTP headers to be parsed as valid. This led to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered unlikely.

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.embed:tomcat-embed-coreMaven	< 7.0.100	7.0.100
org.apache.tomcat.embed:tomcat-embed-coreMaven	>= 8.0.0, < 8.5.51	8.5.51
org.apache.tomcat.embed:tomcat-embed-coreMaven	>= 9.0.0, < 9.0.31	9.0.31
org.apache.tomcat:tomcatMaven	< 7.0.100	7.0.100
org.apache.tomcat:tomcatMaven	>= 8.0.0, < 8.5.51	8.5.51
org.apache.tomcat:tomcatMaven	>= 9.0.0, < 9.0.31	9.0.31

Affected products

Apache/Tomcat29 versions
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*+ 28 more
- cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*range: >=7.0.0,<=7.0.99
- cpe:2.3:a:apache:tomcat:9.0.0:-:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone1:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone10:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone11:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone12:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone13:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone14:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone15:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone16:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone17:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone18:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone19:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone2:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone20:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone21:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone22:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone23:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone24:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone25:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone26:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone27:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone3:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone4:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone5:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone6:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone7:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone8:*:*:*:*:*:*
- cpe:2.3:a:apache:tomcat:9.0.0:milestone9:*:*:*:*:*:*
Debian/linux3 versions
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Canonical/Ubuntu Linux
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
OpenSUSE/Leap
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
NetApp/Data Availability Services
cpe:2.3:a:netapp:data_availability_services:-:*:*:*:*:*:*:*
NetApp/Oncommand System Manager
cpe:2.3:a:netapp:oncommand_system_manager:*:*:*:*:*:*:*:*
Range: >=3.0.0,<=3.1.3
Oracle Corporation/Agile Engineering Data Management
cpe:2.3:a:oracle:agile_engineering_data_management:6.2.1.0:*:*:*:*:*:*:*
Oracle Corporation/Agile Product Lifecycle Management3 versions
cpe:2.3:a:oracle:agile_product_lifecycle_management:9.3.3:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:oracle:agile_product_lifecycle_management:9.3.3:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:agile_product_lifecycle_management:9.3.5:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:agile_product_lifecycle_management:9.3.6:*:*:*:*:*:*:*
Oracle Corporation/Communications Element Manager3 versions
cpe:2.3:a:oracle:communications_element_manager:8.1.1:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:oracle:communications_element_manager:8.1.1:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:communications_element_manager:8.2.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:communications_element_manager:8.2.1:*:*:*:*:*:*:*
Oracle Corporation/Communications Instant Messaging Server
cpe:2.3:a:oracle:communications_instant_messaging_server:10.0.1.4.0:*:*:*:*:*:*:*
Oracle Corporation/Health Sciences Empirica Inspections
cpe:2.3:a:oracle:health_sciences_empirica_inspections:1.0.1.2:*:*:*:*:*:*:*
Oracle Corporation/Health Sciences Empirica Signal
cpe:2.3:a:oracle:health_sciences_empirica_signal:7.3.3:*:*:*:*:*:*:*
Oracle Corporation/Hospitality Guest Access2 versions
cpe:2.3:a:oracle:hospitality_guest_access:4.2.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:oracle:hospitality_guest_access:4.2.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:hospitality_guest_access:4.2.1:*:*:*:*:*:*:*
Oracle Corporation/Hyperion Infrastructure Technology
cpe:2.3:a:oracle:hyperion_infrastructure_technology:11.1.2.4:*:*:*:*:*:*:*
Oracle Corporation/Instantis Enterprisetrack
cpe:2.3:a:oracle:instantis_enterprisetrack:*:*:*:*:*:*:*:*
Range: >=17.1,<=17.3
Oracle Corporation/Mysql Enterprise Monitor
cpe:2.3:a:oracle:mysql_enterprise_monitor:*:*:*:*:*:*:*:*
Range: >=4.0.0,<=4.0.12
Oracle Corporation/Retail Order Broker
cpe:2.3:a:oracle:retail_order_broker:15.0:*:*:*:*:*:*:*
Oracle Corporation/Siebel UI Framework
cpe:2.3:a:oracle:siebel_ui_framework:*:*:*:*:*:*:*:*
Range: <=20.5
Oracle Corporation/Transportation Management
cpe:2.3:a:oracle:transportation_management:6.3.7:*:*:*:*:*:*:*
Oracle Corporation/Workload Manager3 versions
cpe:2.3:a:oracle:workload_manager:12.2.0.1:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:oracle:workload_manager:12.2.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:workload_manager:18c:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:workload_manager:19c:*:*:*:*:*:*:*
Apache/Apache Tomcatv5
Range: Apache Tomcat 9.0.0.M1 to 9.0.30
osv-coords27 versions
pkg:rpm/opensuse/tomcat&distro=openSUSE%20Leap%2015.1 pkg:maven/org.apache.tomcat.embed/tomcat-embed-core pkg:maven/org.apache.tomcat/tomcat pkg:rpm/suse/tomcat&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/tomcat&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSS pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCL pkg:bitnami/tomcat pkg:rpm/opensuse/tomcat&distro=openSUSE%20Tumbleweed pkg:rpm/opensuse/tomcat10&distro=openSUSE%20Tumbleweed pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4 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%20Server%2015-LTSS 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%2012%20SP4 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/tomcat&distro=SUSE%20OpenStack%20Cloud%207 pkg:rpm/suse/tomcat&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL pkg:rpm/suse/tomcat&distro=SUSE%20Enterprise%20Storage%205 pkg:apk/chainguard/spark-3.5.0-compat pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3 pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSS pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Web%20and%20Scripting%2015%20SP1
< 9.0.31-lp151.3.12.1+ 26 more
- (no CPE)range: < 9.0.31-lp151.3.12.1
- (no CPE)range: < 7.0.100
- (no CPE)range: < 7.0.100
- (no CPE)range: < 8.0.53-29.37.1
- (no CPE)range: < 8.0.53-29.37.1
- (no CPE)range: < 8.0.53-29.37.1
- (no CPE)range: < 8.0.53-29.37.1
- (no CPE)range: < 8.0.53-29.37.1
- (no CPE)range: >= 7.0.0, < 7.0.100
- (no CPE)range: < 9.0.36-8.4
- (no CPE)range: < 10.1.14-1.1
- (no CPE)range: < 9.0.31-3.25.1
- (no CPE)range: < 9.0.31-3.42.2
- (no CPE)range: < 9.0.31-3.42.2
- (no CPE)range: < 9.0.31-3.42.2
- (no CPE)range: < 9.0.31-3.42.2
- (no CPE)range: < 9.0.31-3.25.1
- (no CPE)range: < 9.0.31-3.25.1
- (no CPE)range: < 8.0.53-29.37.1
- (no CPE)range: < 8.0.53-29.37.1
- (no CPE)range: < 8.0.53-29.37.1
- (no CPE)range: < 8.0.53-29.37.1
- (no CPE)range: < 3.5.0-r2
- (no CPE)range: < 9.0.31-3.25.1
- (no CPE)range: < 8.0.53-29.37.1
- (no CPE)range: < 8.0.53-29.37.1
- (no CPE)range: < 9.0.31-4.22.1

Patches

Vulnerability mechanics

References

lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.htmlnvdBroken LinkMailing ListThird Party AdvisoryWEB
github.com/advisories/GHSA-qxf4-chvg-4r8rghsaADVISORY
lists.apache.org/thread.html/r127f76181aceffea2bd4711b03c595d0f115f63e020348fe925a916c%40%3Cannounce.tomcat.apache.org%3EnvdMailing ListVendor AdvisoryWEB
lists.debian.org/debian-lts-announce/2020/03/msg00006.htmlnvdMailing ListThird Party AdvisoryWEB
lists.debian.org/debian-lts-announce/2020/05/msg00026.htmlnvdMailing ListThird Party AdvisoryWEB
nvd.nist.gov/vuln/detail/CVE-2020-1935ghsaADVISORY
security.netapp.com/advisory/ntap-20200327-0005/nvdThird Party Advisory
usn.ubuntu.com/4448-1/nvdThird Party Advisory
www.debian.org/security/2020/dsa-4673nvdThird Party AdvisoryWEB
www.debian.org/security/2020/dsa-4680nvdThird Party AdvisoryWEB
www.oracle.com/security-alerts/cpujan2021.htmlnvdThird Party AdvisoryWEB
www.oracle.com/security-alerts/cpujul2020.htmlnvdThird Party AdvisoryWEB
www.oracle.com/security-alerts/cpuoct2020.htmlnvdThird Party AdvisoryWEB
lists.apache.org/thread.html/r441c1f30a252bf14b07396286f6abd8089ce4240e91323211f1a2d75@%3Cusers.tomcat.apache.org%3EghsaWEB
lists.apache.org/thread.html/r660cd379afe346f10d72c0eaa8459ccc95d83aff181671b7e9076919@%3Cusers.tomcat.apache.org%3EghsaWEB
lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78@%3Ccommits.tomee.apache.org%3EghsaWEB
lists.apache.org/thread.html/r80e9c8417c77d52c62809168b96912bda70ddf7748f19f8210f745b1@%3Cusers.tomcat.apache.org%3EghsaWEB
lists.apache.org/thread.html/r9ce7918faf347e7aac32be930bf26c233b0b140fe37af0bb294158b6@%3Cdev.tomcat.apache.org%3EghsaWEB
lists.apache.org/thread.html/ra5dee390ad2d60307b8362505c059cd6a726de4d146d63dfce1e05e7@%3Cusers.tomcat.apache.org%3EghsaWEB
lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743@%3Ccommits.tomee.apache.org%3EghsaWEB
lists.apache.org/thread.html/rd547be0c9d821b4b1000a694b8e58ef9f5e2d66db03a31dfe77c4b18@%3Cusers.tomcat.apache.org%3EghsaWEB
security.netapp.com/advisory/ntap-20200327-0005ghsaWEB
usn.ubuntu.com/4448-1ghsaWEB
lists.apache.org/thread.html/r441c1f30a252bf14b07396286f6abd8089ce4240e91323211f1a2d75%40%3Cusers.tomcat.apache.org%3Envd
lists.apache.org/thread.html/r660cd379afe346f10d72c0eaa8459ccc95d83aff181671b7e9076919%40%3Cusers.tomcat.apache.org%3Envd
lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78%40%3Ccommits.tomee.apache.org%3Envd
lists.apache.org/thread.html/r80e9c8417c77d52c62809168b96912bda70ddf7748f19f8210f745b1%40%3Cusers.tomcat.apache.org%3Envd
lists.apache.org/thread.html/r9ce7918faf347e7aac32be930bf26c233b0b140fe37af0bb294158b6%40%3Cdev.tomcat.apache.org%3Envd
lists.apache.org/thread.html/ra5dee390ad2d60307b8362505c059cd6a726de4d146d63dfce1e05e7%40%3Cusers.tomcat.apache.org%3Envd
lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743%40%3Ccommits.tomee.apache.org%3Envd
lists.apache.org/thread.html/rd547be0c9d821b4b1000a694b8e58ef9f5e2d66db03a31dfe77c4b18%40%3Cusers.tomcat.apache.org%3Envd

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cvss	0.312
epss	0.008
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000