CVE Feed

    Dashboard / CVE / CVE-2019-17569

    CVE-2019-17569

    The refactoring present in Apache Tomcat 9.0.28 to 9.0.30, 8.5.48 to 8.5.50 and 7.0.98 to 7.0.99 introduced a regression. The result of the regression was that invalid Transfer-Encoding headers were incorrectly processed leading 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.

    Published:Feb 24, 2020
    Last Modified:Aug 25, 2026
    EPS:Feb 24, 2020
    EPSS Score:0.08872
    CVSS Score:4.8

    Affected Products

    Vendor
    Apache
    Product
    Tomcat
    Vendor
    Apache
    Product
    Tomee
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Netapp
    Product
    Data Availability Services
    Vendor
    Netapp
    Product
    Oncommand System Manager
    Vendor
    Opensuse
    Product
    Leap
    Vendor
    Oracle
    Product
    Agile Engineering Data Management
    Vendor
    Oracle
    Product
    Agile Product Lifecycle Management
    Vendor
    Oracle
    Product
    Communications Instant Messaging Server
    Vendor
    Oracle
    Product
    Health Sciences Empirica Inspections
    Vendor
    Oracle
    Product
    Health Sciences Empirica Signal
    Vendor
    Oracle
    Product
    Hospitality Guest Access
    Vendor
    Oracle
    Product
    Instantis Enterprisetrack
    Vendor
    Oracle
    Product
    Mysql Enterprise Monitor
    Vendor
    Oracle
    Product
    Transportation Management
    Vendor
    Oracle
    Product
    Workload Manager
    Vendor
    Redhat
    Product
    Jboss Enterprise Web Server

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-273 HTTP Response Smuggling
    CAPEC-33 HTTP Request Smuggling

    Related CVEs

    CVE-2026-73180 (CVSS 6.8) — Insufficient Session Expiration vulnerability in Apache Tomcat meant that if the session ID for an authenticat…
    CVE-2026-68763 (CVSS 7.5) — Uncontrolled Resource Consumption vulnerability in Apache Tomcat via an allocation leak in the HTTP/2 backlog …
    CVE-2026-68569 (CVSS 8.1) — Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances (e.g. CLIENT-CERT, SPN…
    CVE-2026-68525 (CVSS 9.1) — Incorrect Authorization vulnerability in Apache Tomcat's FORM authentication process allows the bypassing of a…
    CVE-2026-66422 (CVSS 8.1) — Improper Authorization vulnerability in Apache Tomcat cause by security-role-ref definitions being incorrectly…
    CVE-2026-65927 (CVSS 7.5) — Off-by-one Error vulnerability in Apache Tomcat impacting the [N] flag on the rewrite valves causes rewrite pr…
    CVE-2026-65905 (CVSS 9.8) — Authentication Bypass by Capture-replay vulnerability in Apache Tomcat's DIGEST authenticator. If, before wind…
    CVE-2026-65637 (CVSS 9.8) — Improper Input Validation vulnerability in Apache Tomcat due to incomplete fix for CVE-2026-32990. This iss…
    CVE-2026-65183 (CVSS 8.1) — Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in Apache Tomcat when creating unix domain soc…
    CVE-2026-65182 (CVSS 9.1) — Improper Access Control, Incorrect Authorization vulnerability in Apache Tomcat leads to security constraint b…

    References

    http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.html
    https://lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78%40%3Ccommits.tomee.apache.org%3E
    https://lists.apache.org/thread.html/r88def002c5c78534674ca67472e035099fbe088813d50062094a1390%40%3Cannounce.tomcat.apache.org%3E
    https://lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743%40%3Ccommits.tomee.apache.org%3E
    https://lists.debian.org/debian-lts-announce/2020/03/msg00006.html
    https://security.netapp.com/advisory/ntap-20200327-0005/
    https://www.debian.org/security/2020/dsa-4673
    https://www.debian.org/security/2020/dsa-4680
    https://www.oracle.com/security-alerts/cpujan2021.html
    https://www.oracle.com/security-alerts/cpujul2020.html
    https://www.oracle.com/security-alerts/cpuoct2020.html
    http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.html
    https://lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78%40%3Ccommits.tomee.apache.org%3E
    https://lists.apache.org/thread.html/r88def002c5c78534674ca67472e035099fbe088813d50062094a1390%40%3Cannounce.tomcat.apache.org%3E
    https://lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743%40%3Ccommits.tomee.apache.org%3E
    https://lists.debian.org/debian-lts-announce/2020/03/msg00006.html
    https://security.netapp.com/advisory/ntap-20200327-0005/
    https://www.debian.org/security/2020/dsa-4673
    https://www.debian.org/security/2020/dsa-4680
    https://www.oracle.com/security-alerts/cpujan2021.html
    https://www.oracle.com/security-alerts/cpujul2020.html
    https://www.oracle.com/security-alerts/cpuoct2020.html

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High