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Vulnerability details: VCID-rq42-qvsy-hue6
Vulnerability ID VCID-rq42-qvsy-hue6
Aliases CVE-2019-17569
GHSA-767j-jfh2-jvrc
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-707 Improper Neutralization
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 4.8 http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.html
generic_textual MODERATE http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.html
cvssv3 4.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-17569.json
epss 0.06163 https://api.first.org/data/v1/epss?cve=CVE-2019-17569
epss 0.06163 https://api.first.org/data/v1/epss?cve=CVE-2019-17569
epss 0.06163 https://api.first.org/data/v1/epss?cve=CVE-2019-17569
epss 0.06163 https://api.first.org/data/v1/epss?cve=CVE-2019-17569
epss 0.06163 https://api.first.org/data/v1/epss?cve=CVE-2019-17569
epss 0.06163 https://api.first.org/data/v1/epss?cve=CVE-2019-17569
epss 0.06163 https://api.first.org/data/v1/epss?cve=CVE-2019-17569
epss 0.06163 https://api.first.org/data/v1/epss?cve=CVE-2019-17569
epss 0.06163 https://api.first.org/data/v1/epss?cve=CVE-2019-17569
apache_tomcat Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-17569
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-767j-jfh2-jvrc
cvssv3.1 4.8 https://lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78@%3Ccommits.tomee.apache.org%3E
generic_textual MODERATE https://lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78@%3Ccommits.tomee.apache.org%3E
cvssv3.1 4.8 https://lists.apache.org/thread.html/r88def002c5c78534674ca67472e035099fbe088813d50062094a1390%40%3Cannounce.tomcat.apache.org%3E
generic_textual MODERATE https://lists.apache.org/thread.html/r88def002c5c78534674ca67472e035099fbe088813d50062094a1390%40%3Cannounce.tomcat.apache.org%3E
cvssv3.1 4.8 https://lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743@%3Ccommits.tomee.apache.org%3E
generic_textual MODERATE https://lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743@%3Ccommits.tomee.apache.org%3E
cvssv3.1 4.8 https://lists.debian.org/debian-lts-announce/2020/03/msg00006.html
generic_textual MODERATE https://lists.debian.org/debian-lts-announce/2020/03/msg00006.html
cvssv3.1 4.8 https://nvd.nist.gov/vuln/detail/CVE-2019-17569
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2019-17569
cvssv3.1 4.8 https://security.netapp.com/advisory/ntap-20200327-0005
generic_textual MODERATE https://security.netapp.com/advisory/ntap-20200327-0005
cvssv3.1 4.8 https://www.debian.org/security/2020/dsa-4673
generic_textual MODERATE https://www.debian.org/security/2020/dsa-4673
cvssv3.1 4.8 https://www.debian.org/security/2020/dsa-4680
generic_textual MODERATE https://www.debian.org/security/2020/dsa-4680
cvssv3.1 4.8 https://www.oracle.com/security-alerts/cpujan2021.html
generic_textual MODERATE https://www.oracle.com/security-alerts/cpujan2021.html
cvssv3.1 4.8 https://www.oracle.com/security-alerts/cpujul2020.html
generic_textual MODERATE https://www.oracle.com/security-alerts/cpujul2020.html
cvssv3.1 4.8 https://www.oracle.com/security-alerts/cpuoct2020.html
generic_textual MODERATE https://www.oracle.com/security-alerts/cpuoct2020.html
Reference id Reference type URL
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-17569.json
https://api.first.org/data/v1/epss?cve=CVE-2019-17569
https://github.com/apache/tomcat/commit/060ecc5eb839208687b7fcc9e35287ac8eb46998
https://github.com/apache/tomcat/commit/959f1dfd767bf3cb64776b44f7395d1d8d8f7ab3
https://github.com/apache/tomcat/commit/b191a0d9cf06f4e04257c221bfe41d2b108a9cc8
https://lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78@%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@%3Ccommits.tomee.apache.org%3E
https://lists.debian.org/debian-lts-announce/2020/03/msg00006.html
https://nvd.nist.gov/vuln/detail/CVE-2019-17569
https://security.netapp.com/advisory/ntap-20200327-0005
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
1806849 https://bugzilla.redhat.com/show_bug.cgi?id=1806849
CVE-2019-17569 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-17569
GHSA-767j-jfh2-jvrc https://github.com/advisories/GHSA-767j-jfh2-jvrc
RHSA-2020:1520 https://access.redhat.com/errata/RHSA-2020:1520
RHSA-2020:1521 https://access.redhat.com/errata/RHSA-2020:1521
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Found at http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-17569.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78@%3Ccommits.tomee.apache.org%3E
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://lists.apache.org/thread.html/r88def002c5c78534674ca67472e035099fbe088813d50062094a1390%40%3Cannounce.tomcat.apache.org%3E
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743@%3Ccommits.tomee.apache.org%3E
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://lists.debian.org/debian-lts-announce/2020/03/msg00006.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2019-17569
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://security.netapp.com/advisory/ntap-20200327-0005
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://www.debian.org/security/2020/dsa-4673
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://www.debian.org/security/2020/dsa-4680
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://www.oracle.com/security-alerts/cpujan2021.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://www.oracle.com/security-alerts/cpujul2020.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://www.oracle.com/security-alerts/cpuoct2020.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

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Exploit Prediction Scoring System (EPSS)
Percentile 0.9078
EPSS Score 0.06163
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:38:08.592368+00:00 Apache Tomcat Importer Import https://tomcat.apache.org/security-9.html 38.0.0