CVE-2020-1935
Summary
| CVE | CVE-2020-1935 |
|---|---|
| State | PUBLISHED |
| Assigner | apache |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2020-02-24 22:15:11 UTC |
| Updated | 2026-10-08 21:17:24 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 4.8 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS: 0.093860000 probability, percentile 0.952960000 (date 2026-10-10)
Problem Types: CWE-444 | HTTP Request Smuggling
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 4.8 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
| 2.0 | [email protected] | Primary | 5.8 | AV:N/AC:M/Au:N/C:P/I:P/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
HighPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
LowIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
MediumAuthentication
NoneConfidentiality
PartialIntegrity
PartialAvailability
NoneAV:N/AC:M/Au:N/C:P/I:P/A:N
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Apache | Tomcat | 9.0.0 | - | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone1 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone10 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone11 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone12 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone13 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone14 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone15 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone16 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone17 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone18 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone19 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone2 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone20 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone21 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone22 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone23 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone24 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone25 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone26 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone27 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone3 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone4 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone5 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone6 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone7 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone8 | All | All |
| Application | Apache | Tomcat | 9.0.0 | milestone9 | All | All |
| Application | Apache | Tomcat | All | All | All | All |
| Application | Apache | Tomcat | All | All | All | All |
| Application | Apache | Tomcat | All | All | All | All |
| Operating System | Canonical | Ubuntu Linux | 16.04 | All | All | All |
| Operating System | Debian | Debian Linux | 10.0 | All | All | All |
| Operating System | Debian | Debian Linux | 8.0 | All | All | All |
| Operating System | Debian | Debian Linux | 9.0 | All | All | All |
| Application | Netapp | Data Availability Services | - | All | All | All |
| Application | Netapp | Oncommand System Manager | All | All | All | All |
| Operating System | Opensuse | Leap | 15.1 | All | All | All |
| Application | Oracle | Agile Engineering Data Management | 6.2.1.0 | All | All | All |
| Application | Oracle | Agile Product Lifecycle Management | 9.3.3 | All | All | All |
| Application | Oracle | Agile Product Lifecycle Management | 9.3.5 | All | All | All |
| Application | Oracle | Agile Product Lifecycle Management | 9.3.6 | All | All | All |
| Application | Oracle | Communications Element Manager | 8.1.1 | All | All | All |
| Application | Oracle | Communications Element Manager | 8.2.0 | All | All | All |
| Application | Oracle | Communications Element Manager | 8.2.1 | All | All | All |
| Application | Oracle | Communications Instant Messaging Server | 10.0.1.4.0 | All | All | All |
| Application | Oracle | Health Sciences Empirica Inspections | 1.0.1.2 | All | All | All |
| Application | Oracle | Health Sciences Empirica Signal | 7.3.3 | All | All | All |
| Application | Oracle | Hospitality Guest Access | 4.2.0 | All | All | All |
| Application | Oracle | Hospitality Guest Access | 4.2.1 | All | All | All |
| Application | Oracle | Hyperion Infrastructure Technology | 11.1.2.4 | All | All | All |
| Application | Oracle | Instantis Enterprisetrack | All | All | All | All |
| Application | Oracle | Mysql Enterprise Monitor | All | All | All | All |
| Application | Oracle | Mysql Enterprise Monitor | All | All | All | All |
| Application | Oracle | Retail Order Broker | 15.0 | All | All | All |
| Application | Oracle | Siebel Ui Framework | All | All | All | All |
| Application | Oracle | Transportation Management | 6.3.7 | All | All | All |
| Application | Oracle | Workload Manager | 12.2.0.1 | All | All | All |
| Application | Oracle | Workload Manager | 18c | All | All | All |
| Application | Oracle | Workload Manager | 19c | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Apache | Apache Tomcat | affected Apache Tomcat 9.0.0.M1 to 9.0.30 | Not specified |
| CNA | Apache | Apache Tomcat | affected 8.5.0 to 8.5.50 | Not specified |
| CNA | Apache | Apache Tomcat | affected 7.0.0 to 7.0.99 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Debian -- Security Information -- DSA-4673-1 tomcat8 | af854a3a-2127-422b-91ae-364da2661108 | www.debian.org | Third Party Advisory |
| [SECURITY] [DLA 2133-1] tomcat7 security update | af854a3a-2127-422b-91ae-364da2661108 | lists.debian.org | Mailing List, Third Party Advisory |
| Oracle Critical Patch Update Advisory - January 2021 | af854a3a-2127-422b-91ae-364da2661108 | www.oracle.com | Third Party Advisory |
| USN-4448-1: Tomcat vulnerabilities | Ubuntu security notices | Ubuntu | af854a3a-2127-422b-91ae-364da2661108 | usn.ubuntu.com | Third Party Advisory |
| Pony Mail! | af854a3a-2127-422b-91ae-364da2661108 | lists.apache.org | |
| Oracle Critical Patch Update Advisory - October 2020 | af854a3a-2127-422b-91ae-364da2661108 | www.oracle.com | Third Party Advisory |
| Pony Mail! | af854a3a-2127-422b-91ae-364da2661108 | lists.apache.org | |
| [security-announce] openSUSE-SU-2020:0345-1: important: Security update | af854a3a-2127-422b-91ae-364da2661108 | lists.opensuse.org | Broken Link, Mailing List, Third Party Advisory |
| [SECURITY] [DLA 2209-1] tomcat8 security update | af854a3a-2127-422b-91ae-364da2661108 | lists.debian.org | Mailing List, Third Party Advisory |
| Pony Mail! | af854a3a-2127-422b-91ae-364da2661108 | lists.apache.org | |
| Debian -- Security Information -- DSA-4680-1 tomcat9 | af854a3a-2127-422b-91ae-364da2661108 | www.debian.org | Third Party Advisory |
| Pony Mail! | af854a3a-2127-422b-91ae-364da2661108 | lists.apache.org | Mailing List, Vendor Advisory |
| Pony Mail! | af854a3a-2127-422b-91ae-364da2661108 | lists.apache.org | |
| Pony Mail! | af854a3a-2127-422b-91ae-364da2661108 | lists.apache.org | |
| Pony Mail! | af854a3a-2127-422b-91ae-364da2661108 | lists.apache.org | |
| Oracle Critical Patch Update Advisory - July 2020 | af854a3a-2127-422b-91ae-364da2661108 | www.oracle.com | Third Party Advisory |
| Pony Mail! | af854a3a-2127-422b-91ae-364da2661108 | lists.apache.org | |
| February 2020 Apache Tomcat Vulnerabilities in NetApp Products | NetApp Product Security | af854a3a-2127-422b-91ae-364da2661108 | security.netapp.com | Third Party Advisory |
| Pony Mail! | af854a3a-2127-422b-91ae-364da2661108 | lists.apache.org | |
| Pony Mail! | MITRE | lists.apache.org | |
| Pony Mail! | MITRE | lists.apache.org | |
| Pony Mail! | MITRE | lists.apache.org | |
| Pony Mail! | MITRE | lists.apache.org | |
| Pony Mail! | MITRE | lists.apache.org | |
| Pony Mail! | MITRE | lists.apache.org | |
| Pony Mail! | MITRE | lists.apache.org | |
| Pony Mail! | MITRE | lists.apache.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 239181 Red Hat Update for tomcat (RHSA-2021:1030)
- 352290 Amazon Linux Security Update for tomcat7: AL2012-2021-331
- 355839 Amazon Linux Security Advisory for tomcat : ALAS2-2023-2216
- 356190 Amazon Linux Security Advisory for tomcat : ALASTOMCAT8.5-2023-012
- 377471 Alibaba Cloud Linux Security Update for tomcat (ALINUX2-SA-2020:0180)
- 378206 Virtuozzo Linux Security Update for tomcat (VZLSA-2020:5020)
- 730112 Atlassian Jira Component Apache Tomcat Hypertext Transfer Protocol (HTTP) Request Smuggling Vulnerability (JRASERVER-70993)
- 730434 Update TITLE manually (JRASERVER-70487)
- 730441 Atlassian Jira Local Privilege Escalation Vulnerability (JRASERVER-70487)
- 730449 (JRASERVER-70487)
- 730510 Atlassian Jira Remote Code Execution (RCE) Vulnerability (JRASERVER-73223)
- 940348 AlmaLinux Security Update for pki-core:10.6 and pki-deps:10.6 (ALSA-2020:4847)
- 981584 Java (maven) Security Update for org.apache.tomcat:tomcat (GHSA-qxf4-chvg-4r8r)