CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
5435 vulnerabilities reference this CWE, most recent first.
GHSA-96WP-6XC2-62MF
Vulnerability from github – Published: 2025-07-21 18:32 – Updated: 2025-08-07 15:33In Netgear R7000 V1.3.1.64_10.1.36 and EAX80 V1.0.1.70_1.0.2, the USERLIMIT_GLOBAL option is set to 0 in the bftpd.conf configuration file. This can cause DoS attacks when unlimited users are connected.
{
"affected": [],
"aliases": [
"CVE-2025-44650"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-21T16:15:29Z",
"severity": "HIGH"
},
"details": "In Netgear R7000 V1.3.1.64_10.1.36 and EAX80 V1.0.1.70_1.0.2, the USERLIMIT_GLOBAL option is set to 0 in the bftpd.conf configuration file. This can cause DoS attacks when unlimited users are connected.",
"id": "GHSA-96wp-6xc2-62mf",
"modified": "2025-08-07T15:33:08Z",
"published": "2025-07-21T18:32:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-44650"
},
{
"type": "WEB",
"url": "https://gist.github.com/TPCchecker/d13d15dfa8965ba88a9437718f77f67d"
},
{
"type": "WEB",
"url": "https://www.netgear.com/about/security"
},
{
"type": "WEB",
"url": "https://www.notion.so/CVE-2025-44650-24754a1113e780dca89dca218b90b1d9"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-9727-XJ59-F5G3
Vulnerability from github – Published: 2022-05-24 17:42 – Updated: 2022-08-31 00:00UniFi Protect before v1.17.1 allows an attacker to use spoofed cameras to perform a denial-of-service attack that may cause the UniFi Protect controller to crash.
{
"affected": [],
"aliases": [
"CVE-2021-22882"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-02-23T19:15:00Z",
"severity": "HIGH"
},
"details": "UniFi Protect before v1.17.1 allows an attacker to use spoofed cameras to perform a denial-of-service attack that may cause the UniFi Protect controller to crash.",
"id": "GHSA-9727-xj59-f5g3",
"modified": "2022-08-31T00:00:20Z",
"published": "2022-05-24T17:42:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-22882"
},
{
"type": "WEB",
"url": "https://hackerone.com/reports/1008579"
},
{
"type": "WEB",
"url": "https://community.ui.com/releases/Security-advisory-bulletin-017-017/071141e5-bc2e-4b71-81f3-5e499316fcee"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-97CQ-F4JM-MV8H
Vulnerability from github – Published: 2024-11-07 12:30 – Updated: 2024-11-07 18:10A flaw was found in Undertow package. Using the FormAuthenticationMechanism, a malicious user could trigger a Denial of Service by sending crafted requests, leading the server to an OutofMemory error, exhausting the server's memory.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "io.undertow:undertow-core"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.2.32.Final"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "io.undertow:undertow-core"
},
"ranges": [
{
"events": [
{
"introduced": "2.3.0.Alpha1"
},
{
"fixed": "2.3.13.Final"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2023-1973"
],
"database_specific": {
"cwe_ids": [
"CWE-20",
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2024-11-07T18:10:18Z",
"nvd_published_at": "2024-11-07T10:15:05Z",
"severity": "MODERATE"
},
"details": "A flaw was found in Undertow package. Using the FormAuthenticationMechanism, a malicious user could trigger a Denial of Service by sending crafted requests, leading the server to an OutofMemory error, exhausting the server\u0027s memory.",
"id": "GHSA-97cq-f4jm-mv8h",
"modified": "2024-11-07T18:10:18Z",
"published": "2024-11-07T12:30:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-1973"
},
{
"type": "WEB",
"url": "https://github.com/undertow-io/undertow/commit/0410f3c4d9b39b754a2203a29834cac51da11258"
},
{
"type": "WEB",
"url": "https://github.com/undertow-io/undertow/commit/b289b18bc0ba40c134698a430c70ca1835c51d78"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2024:1674"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2024:1675"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2024:1676"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2024:1677"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2024:2763"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2024:2764"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2023-1973"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2185662"
},
{
"type": "PACKAGE",
"url": "https://github.com/undertow-io/undertow"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U",
"type": "CVSS_V4"
}
],
"summary": "Undertow Denial of Service vulnerability"
}
GHSA-97GV-3P2C-XW7J
Vulnerability from github – Published: 2019-02-18 23:39 – Updated: 2022-02-11 17:08Versions of i18n-node-angular prior to 1.4.0 are affected by denial of service and cross-site scripting vulnerabilities. The vulnerabilities exist in a REST endpoint that was created for development purposes, but was not disabled in production in affected versions.
Recommendation
Update to version 1.4.0 or later.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "i18n-node-angular"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2016-10524"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-74"
],
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T21:27:47Z",
"nvd_published_at": "2018-05-31T20:29:00Z",
"severity": "HIGH"
},
"details": "Versions of `i18n-node-angular` prior to 1.4.0 are affected by denial of service and cross-site scripting vulnerabilities. The vulnerabilities exist in a REST endpoint that was created for development purposes, but was not disabled in production in affected versions.\n\n\n## Recommendation\n\nUpdate to version 1.4.0 or later.",
"id": "GHSA-97gv-3p2c-xw7j",
"modified": "2022-02-11T17:08:46Z",
"published": "2019-02-18T23:39:06Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-10524"
},
{
"type": "WEB",
"url": "https://github.com/oliversalzburg/i18n-node-angular/commit/877720d2d9bb90dc8233706e81ffa03f99fc9dc8"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-97gv-3p2c-xw7j"
},
{
"type": "PACKAGE",
"url": "https://github.com/oliversalzburg/i18n-node-angular"
},
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/80"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:H",
"type": "CVSS_V3"
}
],
"summary": "Denial of Service and Content Injection in i18n-node-angular"
}
GHSA-97HJ-HR5W-4QR9
Vulnerability from github – Published: 2024-12-12 12:31 – Updated: 2024-12-12 12:31Process residence vulnerability in abnormal scenarios in the print module Impact: Successful exploitation of this vulnerability may affect power consumption.
{
"affected": [],
"aliases": [
"CVE-2024-54113"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-12-12T12:15:27Z",
"severity": "MODERATE"
},
"details": "Process residence vulnerability in abnormal scenarios in the print module\nImpact: Successful exploitation of this vulnerability may affect power consumption.",
"id": "GHSA-97hj-hr5w-4qr9",
"modified": "2024-12-12T12:31:16Z",
"published": "2024-12-12T12:31:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-54113"
},
{
"type": "WEB",
"url": "https://consumer.huawei.com/en/support/bulletin/2024/12"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-97HP-6Q9G-5CW2
Vulnerability from github – Published: 2022-05-24 17:32 – Updated: 2022-06-23 18:05A memory leak flaw was found in WildFly in all versions up to 21.0.0.Final, where host-controller tries to reconnect in a loop, generating new connections which are not properly closed while not able to connect to domain-controller. This flaw allows an attacker to cause an Out of memory (OOM) issue, leading to a denial of service. The highest threat from this vulnerability is to system availability.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 21.0.0"
},
"package": {
"ecosystem": "Maven",
"name": "org.wildfly:wildfly-dist"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "21.0.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-25689"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-401"
],
"github_reviewed": true,
"github_reviewed_at": "2022-06-23T18:05:24Z",
"nvd_published_at": "2020-11-02T21:15:00Z",
"severity": "MODERATE"
},
"details": "A memory leak flaw was found in WildFly in all versions up to 21.0.0.Final, where host-controller tries to reconnect in a loop, generating new connections which are not properly closed while not able to connect to domain-controller. This flaw allows an attacker to cause an Out of memory (OOM) issue, leading to a denial of service. The highest threat from this vulnerability is to system availability.",
"id": "GHSA-97hp-6q9g-5cw2",
"modified": "2022-06-23T18:05:24Z",
"published": "2022-05-24T17:32:58Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-25689"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-25689"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20201123-0006"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "Uncontrolled Resource Consumption in WildFly"
}
GHSA-97R7-8J3P-VC44
Vulnerability from github – Published: 2022-05-13 01:04 – Updated: 2022-05-13 01:04An issue was discovered in Schneider Electric Magelis HMI Magelis GTO Advanced Optimum Panels, all versions, Magelis GTU Universal Panel, all versions, Magelis STO5xx and STU Small panels, all versions, Magelis XBT GH Advanced Hand-held Panels, all versions, Magelis XBT GK Advanced Touchscreen Panels with Keyboard, all versions, Magelis XBT GT Advanced Touchscreen Panels, all versions, and Magelis XBT GTW Advanced Open Touchscreen Panels (Windows XPe). An attacker can open multiple connections to a targeted web server and keep connections open preventing new connections from being made, rendering the web server unavailable during an attack.
{
"affected": [],
"aliases": [
"CVE-2016-8367"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-02-13T21:59:00Z",
"severity": "MODERATE"
},
"details": "An issue was discovered in Schneider Electric Magelis HMI Magelis GTO Advanced Optimum Panels, all versions, Magelis GTU Universal Panel, all versions, Magelis STO5xx and STU Small panels, all versions, Magelis XBT GH Advanced Hand-held Panels, all versions, Magelis XBT GK Advanced Touchscreen Panels with Keyboard, all versions, Magelis XBT GT Advanced Touchscreen Panels, all versions, and Magelis XBT GTW Advanced Open Touchscreen Panels (Windows XPe). An attacker can open multiple connections to a targeted web server and keep connections open preventing new connections from being made, rendering the web server unavailable during an attack.",
"id": "GHSA-97r7-8j3p-vc44",
"modified": "2022-05-13T01:04:06Z",
"published": "2022-05-13T01:04:06Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-8367"
},
{
"type": "WEB",
"url": "https://ics-cert.us-cert.gov/advisories/ICSA-16-308-02"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/94093"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-97RJ-P794-WQ6M
Vulnerability from github – Published: 2022-05-17 04:01 – Updated: 2024-10-14 21:33queryCatalog.py in Plone before 4.2.3 and 4.3 before beta 1 allows remote attackers to bypass caching and cause a denial of service via a crafted request to a collection.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "Plone"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.2.3"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "PyPI",
"name": "Plone"
},
"ranges": [
{
"events": [
{
"introduced": "4.3a0"
},
{
"fixed": "4.3b1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2012-5498"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2023-08-29T20:40:42Z",
"nvd_published_at": "2014-09-30T14:55:00Z",
"severity": "HIGH"
},
"details": "queryCatalog.py in Plone before 4.2.3 and 4.3 before beta 1 allows remote attackers to bypass caching and cause a denial of service via a crafted request to a collection.",
"id": "GHSA-97rj-p794-wq6m",
"modified": "2024-10-14T21:33:00Z",
"published": "2022-05-17T04:01:59Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2012-5498"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2014:1194"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2012-5498"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=874665"
},
{
"type": "PACKAGE",
"url": "https://github.com/plone/Plone"
},
{
"type": "WEB",
"url": "https://github.com/plone/Products.CMFPlone/blob/4.2.3/docs/CHANGES.txt"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/plone/PYSEC-2014-40.yaml"
},
{
"type": "WEB",
"url": "https://plone.org/products/plone-hotfix/releases/20121106"
},
{
"type": "WEB",
"url": "https://plone.org/products/plone/security/advisories/20121106/14"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20130528001715/https://plone.org/products/plone-hotfix/releases/20121106"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20131103191705/https://plone.org/products/plone/security/advisories/20121106/14"
},
{
"type": "WEB",
"url": "http://rhn.redhat.com/errata/RHSA-2014-1194.html"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2012/11/09/7"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2012/11/10/1"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Plone denial of service via Caching Bypass"
}
GHSA-97XF-83QP-65G4
Vulnerability from github – Published: 2025-07-21 18:32 – Updated: 2025-08-07 15:33In H3C GR2200 MiniGR1A0V100R016, the USERLIMIT_GLOBAL option is set to 0 in the /etc/bftpd.conf. This can cause DoS attacks when unlimited users are connected.
{
"affected": [],
"aliases": [
"CVE-2025-44653"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-21T17:15:37Z",
"severity": "HIGH"
},
"details": "In H3C GR2200 MiniGR1A0V100R016, the USERLIMIT_GLOBAL option is set to 0 in the /etc/bftpd.conf. This can cause DoS attacks when unlimited users are connected.",
"id": "GHSA-97xf-83qp-65g4",
"modified": "2025-08-07T15:33:08Z",
"published": "2025-07-21T18:32:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-44653"
},
{
"type": "WEB",
"url": "https://gist.github.com/TPCchecker/1193f51fc870b597c8a59860199d50e4"
},
{
"type": "WEB",
"url": "https://www.notion.so/CVE-2025-44653-24754a1113e780fab128c2c5752f5703"
},
{
"type": "WEB",
"url": "http://h3c.com"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-982M-CQW9-RVQF
Vulnerability from github – Published: 2024-02-12 09:31 – Updated: 2024-02-14 18:30Processing of user-defined DAV user-agent strings is not limited. Availability of OX App Suite could be reduced due to high processing load. Please deploy the provided updates and patch releases. Processing time of DAV user-agents now gets monitored, and the related request is terminated if a resource threshold is reached. No publicly available exploits are known.
{
"affected": [],
"aliases": [
"CVE-2023-41705"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-02-12T09:15:10Z",
"severity": "MODERATE"
},
"details": "Processing of user-defined DAV user-agent strings is not limited. Availability of OX App Suite could be reduced due to high processing load. Please deploy the provided updates and patch releases. Processing time of DAV user-agents now gets monitored, and the related request is terminated if a resource threshold is reached. No publicly available exploits are known.",
"id": "GHSA-982m-cqw9-rvqf",
"modified": "2024-02-14T18:30:24Z",
"published": "2024-02-12T09:31:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-41705"
},
{
"type": "WEB",
"url": "https://documentation.open-xchange.com/appsuite/security/advisories/csaf/2023/oxas-adv-2023-0007.json"
},
{
"type": "WEB",
"url": "https://software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release_6259_7.10.6_2023-12-11.pdf"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/177130/OX-App-Suite-7.10.6-Cross-Site-Scirpting-Denial-Of-Service.html"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Feb/10"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Mitigation
Design throttling mechanisms into the system architecture. The best protection is to limit the amount of resources that an unauthorized user can cause to be expended. A strong authentication and access control model will help prevent such attacks from occurring in the first place. The login application should be protected against DoS attacks as much as possible. Limiting the database access, perhaps by caching result sets, can help minimize the resources expended. To further limit the potential for a DoS attack, consider tracking the rate of requests received from users and blocking requests that exceed a defined rate threshold.
Mitigation
- Mitigation of resource exhaustion attacks requires that the target system either:
- The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
- The second solution is simply difficult to effectively institute -- and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.
- recognizes the attack and denies that user further access for a given amount of time, or
- uniformly throttles all requests in order to make it more difficult to consume resources more quickly than they can again be freed.
Mitigation
Ensure that protocols have specific limits of scale placed on them.
Mitigation
Ensure that all failures in resource allocation place the system into a safe posture.
CAPEC-147: XML Ping of the Death
An attacker initiates a resource depletion attack where a large number of small XML messages are delivered at a sufficiently rapid rate to cause a denial of service or crash of the target. Transactions such as repetitive SOAP transactions can deplete resources faster than a simple flooding attack because of the additional resources used by the SOAP protocol and the resources necessary to process SOAP messages. The transactions used are immaterial as long as they cause resource utilization on the target. In other words, this is a normal flooding attack augmented by using messages that will require extra processing on the target.
CAPEC-227: Sustained Client Engagement
An adversary attempts to deny legitimate users access to a resource by continually engaging a specific resource in an attempt to keep the resource tied up as long as possible. The adversary's primary goal is not to crash or flood the target, which would alert defenders; rather it is to repeatedly perform actions or abuse algorithmic flaws such that a given resource is tied up and not available to a legitimate user. By carefully crafting a requests that keep the resource engaged through what is seemingly benign requests, legitimate users are limited or completely denied access to the resource.
CAPEC-492: Regular Expression Exponential Blowup
An adversary may execute an attack on a program that uses a poor Regular Expression(Regex) implementation by choosing input that results in an extreme situation for the Regex. A typical extreme situation operates at exponential time compared to the input size. This is due to most implementations using a Nondeterministic Finite Automaton(NFA) state machine to be built by the Regex algorithm since NFA allows backtracking and thus more complex regular expressions.