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Vulnerability details: VCID-y9ne-rw7e-vugf
Vulnerability ID VCID-y9ne-rw7e-vugf
Aliases CVE-2026-24733
GHSA-qq5r-98hh-rxc9
Summary Improper Input Validation vulnerability in Apache Tomcat. Tomcat did not limit HTTP/0.9 requests to the GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests, the user could bypass that constraint on GET requests by sending a (specification invalid) HEAD request using HTTP/0.9. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14, from 10.1.0-M1 through 10.1.49, from 9.0.0.M1 through 9.0.112. Older, EOL versions are also affected. Users are recommended to upgrade to version 11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fixes the issue.
Status Published
Exploitability 0.5
Weighted Severity 5.9
Risk 3.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-20 Improper Input Validation
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 5.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-24733.json
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2026-24733
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2026-24733
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2026-24733
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2026-24733
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2026-24733
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2026-24733
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2026-24733
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2026-24733
apache_tomcat Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-24733
cvssv3.1 6.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1_qr LOW https://github.com/advisories/GHSA-qq5r-98hh-rxc9
cvssv4 2.7 https://github.com/apache/tomcat
generic_textual LOW https://github.com/apache/tomcat
cvssv4 2.7 https://github.com/apache/tomcat/commit/2e2fa23f2635bbb819759576a2f2f5e64ecf7c5f
generic_textual LOW https://github.com/apache/tomcat/commit/2e2fa23f2635bbb819759576a2f2f5e64ecf7c5f
cvssv4 2.7 https://github.com/apache/tomcat/commit/6c73d74ff281260d74c836370ff6b82f1da8048b
generic_textual LOW https://github.com/apache/tomcat/commit/6c73d74ff281260d74c836370ff6b82f1da8048b
cvssv4 2.7 https://github.com/apache/tomcat/commit/711b465cf22684a1acf0cb43501cdbbce9b6c5f4
generic_textual LOW https://github.com/apache/tomcat/commit/711b465cf22684a1acf0cb43501cdbbce9b6c5f4
cvssv3.1 6.5 https://lists.apache.org/thread/6xk3t65qpn1myp618krtfotbjn1qt90f
cvssv4 2.7 https://lists.apache.org/thread/6xk3t65qpn1myp618krtfotbjn1qt90f
generic_textual LOW https://lists.apache.org/thread/6xk3t65qpn1myp618krtfotbjn1qt90f
ssvc Track https://lists.apache.org/thread/6xk3t65qpn1myp618krtfotbjn1qt90f
cvssv4 2.7 https://nvd.nist.gov/vuln/detail/CVE-2026-24733
generic_textual LOW https://nvd.nist.gov/vuln/detail/CVE-2026-24733
cvssv4 2.7 https://tomcat.apache.org/security-10.html
generic_textual LOW https://tomcat.apache.org/security-10.html
cvssv4 2.7 https://tomcat.apache.org/security-11.html
generic_textual LOW https://tomcat.apache.org/security-11.html
cvssv4 2.7 https://tomcat.apache.org/security-9.html
generic_textual LOW https://tomcat.apache.org/security-9.html
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-24733.json
https://api.first.org/data/v1/epss?cve=CVE-2026-24733
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/apache/tomcat
https://github.com/apache/tomcat/commit/2e2fa23f2635bbb819759576a2f2f5e64ecf7c5f
https://github.com/apache/tomcat/commit/6c73d74ff281260d74c836370ff6b82f1da8048b
https://github.com/apache/tomcat/commit/711b465cf22684a1acf0cb43501cdbbce9b6c5f4
https://lists.apache.org/thread/6xk3t65qpn1myp618krtfotbjn1qt90f
https://nvd.nist.gov/vuln/detail/CVE-2026-24733
https://tomcat.apache.org/security-10.html
https://tomcat.apache.org/security-11.html
https://tomcat.apache.org/security-9.html
2440437 https://bugzilla.redhat.com/show_bug.cgi?id=2440437
CVE-2026-24733 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-24733
GHSA-qq5r-98hh-rxc9 https://github.com/advisories/GHSA-qq5r-98hh-rxc9
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-24733.json
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

low

high

none

low

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none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
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

low

high

none

low

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none

required

unchanged

changed

high

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none

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low

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high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U Found at https://github.com/apache/tomcat
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

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physical

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passive

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U Found at https://github.com/apache/tomcat/commit/2e2fa23f2635bbb819759576a2f2f5e64ecf7c5f
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

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present

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passive

active

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none
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U Found at https://github.com/apache/tomcat/commit/6c73d74ff281260d74c836370ff6b82f1da8048b
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

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present

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passive

active

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none
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U Found at https://github.com/apache/tomcat/commit/711b465cf22684a1acf0cb43501cdbbce9b6c5f4
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

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passive

active

high

low

none

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none

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low

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none

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low

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://lists.apache.org/thread/6xk3t65qpn1myp618krtfotbjn1qt90f
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

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U Found at https://lists.apache.org/thread/6xk3t65qpn1myp618krtfotbjn1qt90f
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

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none

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low

none

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none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-02-21T21:16:58Z/ Found at https://lists.apache.org/thread/6xk3t65qpn1myp618krtfotbjn1qt90f
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U Found at https://nvd.nist.gov/vuln/detail/CVE-2026-24733
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

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none

passive

active

high

low

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U Found at https://tomcat.apache.org/security-10.html
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

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none
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U Found at https://tomcat.apache.org/security-11.html
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

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none

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low

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high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U Found at https://tomcat.apache.org/security-9.html
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

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none

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low

none

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low

none

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low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.40339
EPSS Score 0.00185
Published At April 2, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:38:03.498039+00:00 Apache Tomcat Importer Import https://tomcat.apache.org/security-11.html 38.0.0