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Vulnerability details: VCID-te53-e21w-tba5
Vulnerability ID VCID-te53-e21w-tba5
Aliases CVE-2021-3629
GHSA-rf6q-vx79-mjxr
Summary Undertow Uncontrolled Resource Consumption A flaw was found in Undertow. A potential security issue in flow control handling by the browser over HTTP/2 may potentially cause overhead or a denial of service in the server. The highest threat from this vulnerability is availability. This flaw affects Undertow versions prior to 2.0.40.Final and prior to 2.2.11.Final.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-400 Uncontrolled Resource Consumption
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 5.9 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-3629.json
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00093 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00096 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
epss 0.00099 https://api.first.org/data/v1/epss?cve=CVE-2021-3629
cvssv3.1 7.5 https://bugzilla.redhat.com/show_bug.cgi?id=1977362
generic_textual HIGH https://bugzilla.redhat.com/show_bug.cgi?id=1977362
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-rf6q-vx79-mjxr
cvssv3.1 7.5 https://github.com/undertow-io/undertow
generic_textual HIGH https://github.com/undertow-io/undertow
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-3629
cvssv3.1 5.9 https://nvd.nist.gov/vuln/detail/CVE-2021-3629
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-3629
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2021-3629
cvssv3.1 7.5 https://security.netapp.com/advisory/ntap-20220729-0008
generic_textual HIGH https://security.netapp.com/advisory/ntap-20220729-0008
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-3629.json
https://api.first.org/data/v1/epss?cve=CVE-2021-3629
https://bugzilla.redhat.com/show_bug.cgi?id=1977362
https://github.com/undertow-io/undertow
https://nvd.nist.gov/vuln/detail/CVE-2021-3629
https://security.netapp.com/advisory/ntap-20220729-0008
https://security.netapp.com/advisory/ntap-20220729-0008/
1016448 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1016448
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:linux:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:linux:*:*
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:*
cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:integration:-:*:*:*:text-only:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:integration:-:*:*:*:text-only:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:-:*:*:*:text-only:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:jboss_enterprise_application_platform:-:*:*:*:text-only:*:*:*
cpe:2.3:a:redhat:single_sign-on:-:*:*:*:text-only:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:single_sign-on:-:*:*:*:text-only:*:*:*
cpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*
cpe:2.3:a:redhat:wildfly_core:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:wildfly_core:*:*:*:*:*:*:*:*
GHSA-rf6q-vx79-mjxr https://github.com/advisories/GHSA-rf6q-vx79-mjxr
RHSA-2021:4676 https://access.redhat.com/errata/RHSA-2021:4676
RHSA-2021:4677 https://access.redhat.com/errata/RHSA-2021:4677
RHSA-2021:4679 https://access.redhat.com/errata/RHSA-2021:4679
RHSA-2021:4767 https://access.redhat.com/errata/RHSA-2021:4767
RHSA-2021:5134 https://access.redhat.com/errata/RHSA-2021:5134
RHSA-2021:5149 https://access.redhat.com/errata/RHSA-2021:5149
RHSA-2021:5150 https://access.redhat.com/errata/RHSA-2021:5150
RHSA-2021:5151 https://access.redhat.com/errata/RHSA-2021:5151
RHSA-2021:5154 https://access.redhat.com/errata/RHSA-2021:5154
RHSA-2021:5170 https://access.redhat.com/errata/RHSA-2021:5170
RHSA-2022:0146 https://access.redhat.com/errata/RHSA-2022:0146
RHSA-2022:1179 https://access.redhat.com/errata/RHSA-2022:1179
RHSA-2022:5532 https://access.redhat.com/errata/RHSA-2022:5532
RHSA-2022:6407 https://access.redhat.com/errata/RHSA-2022:6407
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-3629.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

high

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:N/I:N/A:H Found at https://bugzilla.redhat.com/show_bug.cgi?id=1977362
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/undertow-io/undertow
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: AV:N/AC:M/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-3629
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-3629
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-3629
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://security.netapp.com/advisory/ntap-20220729-0008
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
Exploit Prediction Scoring System (EPSS)
Percentile 0.27203
EPSS Score 0.00093
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T09:15:17.009892+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-rf6q-vx79-mjxr/GHSA-rf6q-vx79-mjxr.json 37.0.0