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Medium 4.8Published Feb 24, 2020
CVE-2020-1935In 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 va…
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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.
- CVSS
- 4.8 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- apache
- NVD analysis
- Modified
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Apache Apache Tomcat apache:tomcat (from the name) | Apache Tomcat 9.0.0.M1 to 9.0.30; 8.5.0 to 8.5.50; 7.0.0 to 7.0.99 | CNA record |
apache tomcat apache:tomcat | from 7.0.0 through 7.0.99; from 8.5.0 through 8.5.50; from 9.0.0 through 9.0.30; 9.0.0; 9.0.0; 9.0.0; 9.0.0; 9.0.0; and 23 more ranges | NVD |
debian debian_linux debian:debian_linux | 8.0; 9.0; 10.0 | NVD |
canonical ubuntu_linux canonical:ubuntu_linux | 16.04 | NVD |
opensuse leap opensuse:leap | 15.1 | NVD |
netapp data_availability_services netapp:data_availability_services | all versions | NVD |
netapp oncommand_system_manager netapp:oncommand_system_manager | from 3.0.0 through 3.1.3 | NVD |
oracle agile_engineering_data_management oracle:agile_engineering_data_management | 6.2.1.0 | NVD |
oracle agile_product_lifecycle_management oracle:agile_product_lifecycle_management | 9.3.3; 9.3.5; 9.3.6 | NVD |
oracle communications_element_manager oracle:communications_element_manager | 8.1.1; 8.2.0; 8.2.1 | NVD |
oracle communications_instant_messaging_server oracle:communications_instant_messaging_server | 10.0.1.4.0 | NVD |
oracle health_sciences_empirica_inspections oracle:health_sciences_empirica_inspections | 1.0.1.2 | NVD |
oracle health_sciences_empirica_signal oracle:health_sciences_empirica_signal | 7.3.3 | NVD |
oracle hospitality_guest_access oracle:hospitality_guest_access | 4.2.0; 4.2.1 | NVD |
oracle hyperion_infrastructure_technology oracle:hyperion_infrastructure_technology | 11.1.2.4 | NVD |
oracle instantis_enterprisetrack oracle:instantis_enterprisetrack | from 17.1 through 17.3 | NVD |
oracle mysql_enterprise_monitor oracle:mysql_enterprise_monitor | from 4.0.0 through 4.0.12; from 8.0.0 through 8.0.20 | NVD |
oracle retail_order_broker oracle:retail_order_broker | 15.0 | NVD |
oracle siebel_ui_framework oracle:siebel_ui_framework | through 20.5 | NVD |
oracle transportation_management oracle:transportation_management | 6.3.7 | NVD |
oracle workload_manager oracle:workload_manager | 12.2.0.1; 18c; 19c | NVD |
References
- https://lists.apache.org/thread.html/r127f76181aceffea2bd4711b03c595d0f115f63e020348fe925a916c%40%3Cannounce.tomcat.apache.org%3Emailing-list, x-refsource-mlist
- https://lists.debian.org/debian-lts-announce/2020/03/msg00006.htmlmailing-list, x-refsource-mlist
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.htmlvendor-advisory, x-refsource-suse
- https://lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743%40%3Ccommits.tomee.apache.org%3Emailing-list, x-refsource-mlist
- https://lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78%40%3Ccommits.tomee.apache.org%3Emailing-list, x-refsource-mlist
- https://www.debian.org/security/2020/dsa-4673vendor-advisory, x-refsource-debian
- https://www.debian.org/security/2020/dsa-4680vendor-advisory, x-refsource-debian
- https://lists.debian.org/debian-lts-announce/2020/05/msg00026.htmlmailing-list, x-refsource-mlist
- https://www.oracle.com/security-alerts/cpujul2020.htmlx-refsource-misc
- https://security.netapp.com/advisory/ntap-20200327-0005/x-refsource-confirm
- https://lists.apache.org/thread.html/r441c1f30a252bf14b07396286f6abd8089ce4240e91323211f1a2d75%40%3Cusers.tomcat.apache.org%3Emailing-list, x-refsource-mlist
- https://lists.apache.org/thread.html/r660cd379afe346f10d72c0eaa8459ccc95d83aff181671b7e9076919%40%3Cusers.tomcat.apache.org%3Emailing-list, x-refsource-mlist
- https://lists.apache.org/thread.html/rd547be0c9d821b4b1000a694b8e58ef9f5e2d66db03a31dfe77c4b18%40%3Cusers.tomcat.apache.org%3Emailing-list, x-refsource-mlist
- https://lists.apache.org/thread.html/ra5dee390ad2d60307b8362505c059cd6a726de4d146d63dfce1e05e7%40%3Cusers.tomcat.apache.org%3Emailing-list, x-refsource-mlist
- https://lists.apache.org/thread.html/r80e9c8417c77d52c62809168b96912bda70ddf7748f19f8210f745b1%40%3Cusers.tomcat.apache.org%3Emailing-list, x-refsource-mlist
- https://usn.ubuntu.com/4448-1/vendor-advisory, x-refsource-ubuntu
- https://www.oracle.com/security-alerts/cpuoct2020.htmlx-refsource-misc
- https://www.oracle.com/security-alerts/cpujan2021.htmlx-refsource-misc
- https://lists.apache.org/thread.html/r9ce7918faf347e7aac32be930bf26c233b0b140fe37af0bb294158b6%40%3Cdev.tomcat.apache.org%3Emailing-list, x-refsource-mlist
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.