CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
6201 vulnerabilities reference this CWE, most recent first.
GHSA-5J9P-W3CM-6283
Vulnerability from github – Published: 2026-01-08 18:30 – Updated: 2026-01-08 21:30An issue in Insiders Technologies GmbH e-invoice pro before release 1 Service Pack 2 allows a remote attacker to cause a denial of service via a crafted script
{
"affected": [],
"aliases": [
"CVE-2025-56424"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-01-08T17:15:47Z",
"severity": "HIGH"
},
"details": "An issue in Insiders Technologies GmbH e-invoice pro before release 1 Service Pack 2 allows a remote attacker to cause a denial of service via a crafted script",
"id": "GHSA-5j9p-w3cm-6283",
"modified": "2026-01-08T21:30:34Z",
"published": "2026-01-08T18:30:49Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-56424"
},
{
"type": "WEB",
"url": "https://insiders-technologies.com/en/e-invoice"
},
{
"type": "WEB",
"url": "https://mind-bytes.de/xml-external-entity-xxe-injection-in-e-invoice-pro-cve-2025-56424"
}
],
"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-5JFM-FVC2-73XF
Vulnerability from github – Published: 2023-08-02 03:30 – Updated: 2024-04-04 06:29An issue has been discovered in GitLab CE/EE affecting all versions starting from 9.3 before 16.0.8, all versions starting from 16.1 before 16.1.3, all versions starting from 16.2 before 16.2.2. A Regular Expression Denial of Service was possible via sending crafted payloads which use ProjectReferenceFilter to the preview_markdown endpoint.
{
"affected": [],
"aliases": [
"CVE-2023-3994"
],
"database_specific": {
"cwe_ids": [
"CWE-1333",
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-08-02T01:15:09Z",
"severity": "HIGH"
},
"details": "An issue has been discovered in GitLab CE/EE affecting all versions starting from 9.3 before 16.0.8, all versions starting from 16.1 before 16.1.3, all versions starting from 16.2 before 16.2.2. A Regular Expression Denial of Service was possible via sending crafted payloads which use ProjectReferenceFilter to the preview_markdown endpoint.",
"id": "GHSA-5jfm-fvc2-73xf",
"modified": "2024-04-04T06:29:26Z",
"published": "2023-08-02T03:30:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-3994"
},
{
"type": "WEB",
"url": "https://hackerone.com/reports/1963255"
},
{
"type": "WEB",
"url": "https://gitlab.com/gitlab-org/gitlab/-/issues/416225"
}
],
"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-5JFW-Q283-HM73
Vulnerability from github – Published: 2022-05-13 01:36 – Updated: 2022-05-13 01:36In Eclipse Mosquitto 1.4.14, a user can shutdown the Mosquitto server simply by filling the RAM memory with a lot of connections with large payload. This can be done without authentications if occur in connection phase of MQTT protocol.
{
"affected": [],
"aliases": [
"CVE-2017-7651"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-04-24T14:29:00Z",
"severity": "HIGH"
},
"details": "In Eclipse Mosquitto 1.4.14, a user can shutdown the Mosquitto server simply by filling the RAM memory with a lot of connections with large payload. This can be done without authentications if occur in connection phase of MQTT protocol.",
"id": "GHSA-5jfw-q283-hm73",
"modified": "2022-05-13T01:36:16Z",
"published": "2022-05-13T01:36:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-7651"
},
{
"type": "WEB",
"url": "https://bugs.eclipse.org/bugs/show_bug.cgi?id=529754"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2018/03/msg00037.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2018/06/msg00016.html"
},
{
"type": "WEB",
"url": "https://mosquitto.org/blog/2018/02/security-advisory-cve-2017-7651-cve-2017-7652"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2018/dsa-4325"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-5JG7-J4XC-267P
Vulnerability from github – Published: 2024-11-11 15:31 – Updated: 2024-11-12 15:30In Helix Core versions prior to 2024.2, an unauthenticated remote Denial of Service (DoS) via the auto-generation function was identified. Reported by Karol Więsek.
{
"affected": [],
"aliases": [
"CVE-2024-10314"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-11-11T14:15:14Z",
"severity": "HIGH"
},
"details": "In Helix Core versions prior to 2024.2, an unauthenticated remote Denial of Service (DoS) via the auto-generation function was identified. Reported by Karol Wi\u0119sek.",
"id": "GHSA-5jg7-j4xc-267p",
"modified": "2024-11-12T15:30:39Z",
"published": "2024-11-11T15:31:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-10314"
},
{
"type": "WEB",
"url": "https://portal.perforce.com/s/detail/a91PA000001SZNFYA4"
}
],
"schema_version": "1.4.0",
"severity": [
{
"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:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-5JPQ-RG6X-9VCR
Vulnerability from github – Published: 2025-03-27 06:32 – Updated: 2025-03-27 06:32A vulnerability was found in zhangyd-c OneBlog up to 2.3.9. It has been classified as problematic. Affected is an unknown function of the component HTTP Header Handler. The manipulation of the argument X-Forwarded-For leads to inefficient regular expression complexity. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
{
"affected": [],
"aliases": [
"CVE-2025-2833"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-03-27T04:15:23Z",
"severity": "MODERATE"
},
"details": "A vulnerability was found in zhangyd-c OneBlog up to 2.3.9. It has been classified as problematic. Affected is an unknown function of the component HTTP Header Handler. The manipulation of the argument X-Forwarded-For leads to inefficient regular expression complexity. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.",
"id": "GHSA-5jpq-rg6x-9vcr",
"modified": "2025-03-27T06:32:04Z",
"published": "2025-03-27T06:32:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-2833"
},
{
"type": "WEB",
"url": "https://github.com/zhangyd-c/OneBlog/issues/35"
},
{
"type": "WEB",
"url": "https://github.com/zhangyd-c/OneBlog/issues/35#issue-2914268214"
},
{
"type": "WEB",
"url": "https://vuldb.com/?ctiid.301470"
},
{
"type": "WEB",
"url": "https://vuldb.com/?id.301470"
},
{
"type": "WEB",
"url": "https://vuldb.com/?submit.521813"
}
],
"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"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-5JVQ-HM47-FX4P
Vulnerability from github – Published: 2023-07-18 21:30 – Updated: 2024-04-04 06:14ChakraCore branch master cbb9b was discovered to contain a segmentation violation via the function Js::ProfilingHelpers::ProfiledNewScArray().
{
"affected": [],
"aliases": [
"CVE-2023-37141"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-07-18T20:15:09Z",
"severity": "MODERATE"
},
"details": "ChakraCore branch master cbb9b was discovered to contain a segmentation violation via the function Js::ProfilingHelpers::ProfiledNewScArray().",
"id": "GHSA-5jvq-hm47-fx4p",
"modified": "2024-04-04T06:14:37Z",
"published": "2023-07-18T21:30:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-37141"
},
{
"type": "WEB",
"url": "https://github.com/chakra-core/ChakraCore/issues/6886"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-5M2V-HC64-56H6
Vulnerability from github – Published: 2019-09-30 16:05 – Updated: 2023-11-17 22:49In Rubyzip before 1.3.0, a crafted ZIP file can bypass application checks on ZIP entry sizes because data about the uncompressed size can be spoofed. This allows attackers to cause a denial of service (disk consumption).
{
"affected": [
{
"package": {
"ecosystem": "RubyGems",
"name": "rubyzip"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.3.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2019-16892"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2019-09-30T16:04:36Z",
"nvd_published_at": "2019-09-25T22:15:10Z",
"severity": "MODERATE"
},
"details": "In Rubyzip before 1.3.0, a crafted ZIP file can bypass application checks on ZIP entry sizes because data about the uncompressed size can be spoofed. This allows attackers to cause a denial of service (disk consumption).",
"id": "GHSA-5m2v-hc64-56h6",
"modified": "2023-11-17T22:49:37Z",
"published": "2019-09-30T16:05:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-16892"
},
{
"type": "WEB",
"url": "https://github.com/rubyzip/rubyzip/pull/403"
},
{
"type": "WEB",
"url": "https://github.com/rubyzip/rubyzip/commit/d65fe7bd283ec94f9d6dc7605f61a6b0dd00f55e"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHBA-2019:4047"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:4201"
},
{
"type": "WEB",
"url": "https://github.com/jdleesmiller/ruby-advisory-db/blob/master/gems/rubyzip/CVE-2019-16892.yml"
},
{
"type": "WEB",
"url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rubyzip/CVE-2019-16892.yml"
},
{
"type": "PACKAGE",
"url": "https://github.com/rubyzip/rubyzip"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J45KSFPP6DFVWLC7Z73L7SX735CKZYO6"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MWWPORMSBHZTMP4PGF4DQD22TTKBQMMC"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X255K6ZBAQC462PQN2ND5HOTTQEJ2G2X"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J45KSFPP6DFVWLC7Z73L7SX735CKZYO6"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWWPORMSBHZTMP4PGF4DQD22TTKBQMMC"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X255K6ZBAQC462PQN2ND5HOTTQEJ2G2X"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "Rubyzip denial of service "
}
GHSA-5M4M-73W9-8433
Vulnerability from github – Published: 2026-06-10 00:31 – Updated: 2026-08-12 18:00Spring Data Commons contains a vulnerability that can lead to a Denial of Service (DoS) condition if Spring Data Web Support is enabled in conjunction with a Controller method using @ProjectedPayload, when an attacker sends a specially crafted HTTP request that causes the application to allocate lots of memory.
Affected versions: Spring Data Commons 4.0.0 through 4.0.5; 3.5.0 through 3.5.11; 3.4.0 through 3.4.14; 3.3.0 through 3.3.16; 3.2.0 through 3.2.15; 3.1.0 through 3.1.14; 3.0.0 through 3.0.15; 2.7.0 through 2.7.19.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.0.5"
},
"package": {
"ecosystem": "Maven",
"name": "org.springframework.data:spring-data-commons"
},
"ranges": [
{
"events": [
{
"introduced": "4.0.0"
},
{
"fixed": "4.0.6"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 3.5.11"
},
"package": {
"ecosystem": "Maven",
"name": "org.springframework.data:spring-data-commons"
},
"ranges": [
{
"events": [
{
"introduced": "3.5.0"
},
{
"fixed": "3.5.12"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "org.springframework.data:spring-data-commons"
},
"ranges": [
{
"events": [
{
"introduced": "3.4.0"
},
{
"last_affected": "3.4.14"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "org.springframework.data:spring-data-commons"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"last_affected": "3.3.16"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "org.springframework.data:spring-data-commons"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "2.7.19"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-41721"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2026-08-12T18:00:35Z",
"nvd_published_at": "2026-06-10T00:16:51Z",
"severity": "MODERATE"
},
"details": "Spring Data Commons contains a vulnerability that can lead to a Denial of Service (DoS) condition if Spring Data Web Support is enabled in conjunction with a Controller method using @ProjectedPayload, when an attacker sends a specially crafted HTTP request that causes the application to allocate lots of memory.\n\nAffected versions:\nSpring Data Commons 4.0.0 through 4.0.5; 3.5.0 through 3.5.11; 3.4.0 through 3.4.14; 3.3.0 through 3.3.16; 3.2.0 through 3.2.15; 3.1.0 through 3.1.14; 3.0.0 through 3.0.15; 2.7.0 through 2.7.19.",
"id": "GHSA-5m4m-73w9-8433",
"modified": "2026-08-12T18:00:35Z",
"published": "2026-06-10T00:31:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41721"
},
{
"type": "WEB",
"url": "https://github.com/spring-projects/spring-data-commons/releases/tag/3.5.12"
},
{
"type": "WEB",
"url": "https://github.com/spring-projects/spring-data-commons/releases/tag/4.0.6"
},
{
"type": "WEB",
"url": "https://spring.io/security/cve-2026-41721"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "Spring Data Commons: Denial of Service via excessive memory allocation in projection binding"
}
GHSA-5M63-VXPQ-9J8M
Vulnerability from github – Published: 2022-05-24 17:42 – Updated: 2022-07-13 00:01On BIG-IP Advanced WAF and ASM version 16.0.x before 16.0.1.1, 15.1.x before 15.1.2, 14.1.x before 14.1.3.1, 13.1.x before 13.1.3.6, and all 12.1.x versions, when the BIG-IP ASM system processes WebSocket requests with JSON payloads, an unusually large number of parameters can cause excessive CPU usage in the BIG-IP ASM bd process. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.
{
"affected": [],
"aliases": [
"CVE-2021-22976"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-02-12T18:15:00Z",
"severity": "HIGH"
},
"details": "On BIG-IP Advanced WAF and ASM version 16.0.x before 16.0.1.1, 15.1.x before 15.1.2, 14.1.x before 14.1.3.1, 13.1.x before 13.1.3.6, and all 12.1.x versions, when the BIG-IP ASM system processes WebSocket requests with JSON payloads, an unusually large number of parameters can cause excessive CPU usage in the BIG-IP ASM bd process. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.",
"id": "GHSA-5m63-vxpq-9j8m",
"modified": "2022-07-13T00:01:10Z",
"published": "2022-05-24T17:42:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-22976"
},
{
"type": "WEB",
"url": "https://support.f5.com/csp/article/K88230177"
}
],
"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-5M7G-HW7H-Q4QH
Vulnerability from github – Published: 2024-05-08 09:30 – Updated: 2024-05-23 00:30The etcd package distributed with the Red Hat OpenStack platform has an incomplete fix for CVE-2023-39325/CVE-2023-44487, known as Rapid Reset. This issue occurs because the etcd package in the Red Hat OpenStack platform is using http://golang.org/x/net/http2 instead of the one provided by Red Hat Enterprise Linux versions, meaning it should be updated at compile time instead.
{
"affected": [],
"aliases": [
"CVE-2024-4438"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-08T09:15:09Z",
"severity": "HIGH"
},
"details": "The etcd package distributed with the Red Hat OpenStack platform has an incomplete fix for CVE-2023-39325/CVE-2023-44487, known as Rapid Reset. This issue occurs because the etcd package in the Red Hat OpenStack platform is using http://golang.org/x/net/http2 instead of the one provided by Red Hat Enterprise Linux versions, meaning it should be updated at compile time instead.",
"id": "GHSA-5m7g-hw7h-q4qh",
"modified": "2024-05-23T00:30:37Z",
"published": "2024-05-08T09:30:50Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-4438"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2024:2729"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2024-4438"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2279365"
}
],
"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"
}
]
}
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.