CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
5412 vulnerabilities reference this CWE, most recent first.
GHSA-V3C5-JQR6-7QM8
Vulnerability from github – Published: 2022-12-23 00:30 – Updated: 2025-04-15 18:48An issue discovered in Python Charmers Future 0.18.2 and earlier allows remote attackers to cause a denial of service via crafted Set-Cookie header from malicious web server. This issue has been patched in version 0.18.3.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 0.18.2"
},
"package": {
"ecosystem": "PyPI",
"name": "future"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.18.3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-40899"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2023-01-04T13:50:24Z",
"nvd_published_at": "2022-12-23T00:15:00Z",
"severity": "HIGH"
},
"details": "An issue discovered in Python Charmers Future 0.18.2 and earlier allows remote attackers to cause a denial of service via crafted Set-Cookie header from malicious web server. This issue has been patched in version 0.18.3.",
"id": "GHSA-v3c5-jqr6-7qm8",
"modified": "2025-04-15T18:48:13Z",
"published": "2022-12-23T00:30:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-40899"
},
{
"type": "WEB",
"url": "https://github.com/PythonCharmers/python-future/pull/610"
},
{
"type": "WEB",
"url": "https://github.com/python/cpython/pull/17157"
},
{
"type": "WEB",
"url": "https://github.com/PythonCharmers/python-future/commit/c91d70b34ef0402aef3e9d04364ba98509dca76f"
},
{
"type": "PACKAGE",
"url": "https://github.com/PythonCharmers/python-future"
},
{
"type": "WEB",
"url": "https://github.com/PythonCharmers/python-future/blob/master/src/future/backports/http/cookiejar.py#L215"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/future/PYSEC-2022-42991.yaml"
},
{
"type": "WEB",
"url": "https://pypi.org/project/future"
},
{
"type": "WEB",
"url": "https://pyup.io/posts/pyup-discovers-redos-vulnerabilities-in-top-python-packages"
}
],
"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": "Python Charmers Future denial of service vulnerability"
}
GHSA-V3CQ-R2F8-QMMC
Vulnerability from github – Published: 2026-06-26 03:31 – Updated: 2026-06-26 03:31A flaw in Node.js HTTP/2 client allows a server to send an unlimited number of ORIGIN frames, which could lead to an Out of Memory error on the client.
This vulnerability affects all supported release lines: Node.js 22, Node.js 24, and Node.js 26.
{
"affected": [],
"aliases": [
"CVE-2026-48619"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-26T02:16:52Z",
"severity": "MODERATE"
},
"details": "A flaw in Node.js HTTP/2 client allows a server to send an unlimited number of ORIGIN frames, which could lead to an Out of Memory error on the client.\n\nThis vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.",
"id": "GHSA-v3cq-r2f8-qmmc",
"modified": "2026-06-26T03:31:29Z",
"published": "2026-06-26T03:31:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48619"
},
{
"type": "WEB",
"url": "https://nodejs.org/en/blog/vulnerability/june-2026-security-releases"
}
],
"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:L",
"type": "CVSS_V3"
}
]
}
GHSA-V3H8-RW48-H4GR
Vulnerability from github – Published: 2022-05-13 01:07 – Updated: 2024-01-15 19:14Apache Geronimo 2.2.1 and earlier computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters. NOTE: this might overlap CVE-2011-4461.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.apache.geronimo:geronimo"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.2.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2011-5034"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2024-01-15T19:14:56Z",
"nvd_published_at": "2011-12-30T01:55:00Z",
"severity": "HIGH"
},
"details": "Apache Geronimo 2.2.1 and earlier computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters. NOTE: this might overlap CVE-2011-4461.",
"id": "GHSA-v3h8-rw48-h4gr",
"modified": "2024-01-15T19:14:56Z",
"published": "2022-05-13T01:07:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2011-5034"
},
{
"type": "WEB",
"url": "https://github.com/FireFart/HashCollision-DOS-POC/blob/master/HashtablePOC.py"
},
{
"type": "PACKAGE",
"url": "https://github.com/apache/geronimo"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r20957aa5962a48328f199e2373f408aeeae601a45dd5275a195e2b6e@%3Cjava-dev.axis.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r360b70489bad65286b49ceb5303a849d2a7ec7d1292774a7259579e1@%3Cissues.karaf.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r3c541f019b74902e8e61d73e40ecc2837dfce1b744ad5546919b993c@%3Cissues.karaf.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r4fe6b5ff1d48e23337304fd5ac983d89328aecbd1fa198cfc966fbd7@%3Cdev.geronimo.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r653f633aa7b6ccbb8c338dbfcea7a00e4ae9d6f3e064a03cab8dc20d@%3Cjava-dev.axis.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r67747af92035942c9c413bd8394acbb8a1ace5833c0177014c825bc2@%3Cissues.karaf.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r8dc1a0ae0e0cf9d2494b8cbd66562f99331c4cf635e7781850a9b9ba@%3Cjava-dev.axis.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/ra10015f6f3c3c88b7d813383554e87c06347fe163487148669189b8e@%3Cdev.geronimo.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/ra1fe29f6399b68980f914d8613dee7f67d62a1a97722fe9cd56f4f5f@%3Cdev.geronimo.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/rb0e85243d7268f1d7a1edb5e6c7df885dbd300acabaaf4cb0e880518@%3Cissues.karaf.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/rdd67ea3e489134f653349fc2cb09828ac8462aa61dd776b505a3297a@%3Cissues.karaf.apache.org%3E"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20120105151644/http://www.nruns.com/_downloads/advisory28122011.pdf"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20130213132312/http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html"
},
{
"type": "WEB",
"url": "http://www.kb.cert.org/vuls/id/903934"
},
{
"type": "WEB",
"url": "http://www.ocert.org/advisories/ocert-2011-003.html"
}
],
"schema_version": "1.4.0",
"severity": [],
"summary": "Apache Geronimo Hash Collisions Cause DoS"
}
GHSA-V3J3-5FRM-692P
Vulnerability from github – Published: 2023-04-14 00:31 – Updated: 2024-04-04 03:27TiKV 6.1.2 allows remote attackers to cause a denial of service (fatal error) upon an attempt to get a timestamp from the Placement Driver.
{
"affected": [],
"aliases": [
"CVE-2023-30635"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-04-13T23:15:00Z",
"severity": "HIGH"
},
"details": "TiKV 6.1.2 allows remote attackers to cause a denial of service (fatal error) upon an attempt to get a timestamp from the Placement Driver.",
"id": "GHSA-v3j3-5frm-692p",
"modified": "2024-04-04T03:27:34Z",
"published": "2023-04-14T00:31:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-30635"
},
{
"type": "WEB",
"url": "https://github.com/tikv/tikv/issues/14516"
}
],
"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-V3J6-JV37-286J
Vulnerability from github – Published: 2024-05-14 15:32 – Updated: 2024-05-14 15:32An issue has been discovered in GitLab CE/EE affecting all versions before 16.9.7, all versions starting from 16.10 before 16.10.5, all versions starting from 16.11 before 16.11.2. It was possible for an attacker to cause a denial of service using maliciously crafted markdown content.
{
"affected": [],
"aliases": [
"CVE-2024-2651"
],
"database_specific": {
"cwe_ids": [
"CWE-1333",
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-14T15:20:14Z",
"severity": "MODERATE"
},
"details": "An issue has been discovered in GitLab CE/EE affecting all versions before 16.9.7, all versions starting from 16.10 before 16.10.5, all versions starting from 16.11 before 16.11.2. It was possible for an attacker to cause a denial of service using maliciously crafted markdown content.",
"id": "GHSA-v3j6-jv37-286j",
"modified": "2024-05-14T15:32:54Z",
"published": "2024-05-14T15:32:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-2651"
},
{
"type": "WEB",
"url": "https://hackerone.com/reports/2408619"
},
{
"type": "WEB",
"url": "https://gitlab.com/gitlab-org/gitlab/-/issues/450830"
}
],
"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"
}
]
}
GHSA-V3JC-474W-2WM6
Vulnerability from github – Published: 2026-07-01 18:31 – Updated: 2026-07-01 21:36Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows an remote attacker to cause a denial of service through memory exhaustion by sending oversized compressed header blocks before the HTTP/2 SETTINGS acknowledgement causes the configured header list size limit to be applied.
{
"affected": [],
"aliases": [
"CVE-2026-54428"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-01T18:16:34Z",
"severity": "HIGH"
},
"details": "Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows an remote attacker to cause a denial of service through memory exhaustion by sending oversized compressed header blocks before the HTTP/2 SETTINGS acknowledgement causes the configured header list size limit to be applied.",
"id": "GHSA-v3jc-474w-2wm6",
"modified": "2026-07-01T21:36:16Z",
"published": "2026-07-01T18:31:56Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54428"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread/5zjp8vczvxq19pw2rvhs21q446bhl0sd"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2026/07/01/3"
}
],
"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-V3PJ-P78R-2J24
Vulnerability from github – Published: 2026-05-28 21:32 – Updated: 2026-05-28 21:32Vulnerability in Oracle REST Data Services (component: Core). Supported versions that are affected are 24.2.0-26.1.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTPS to compromise Oracle REST Data Services. While the vulnerability is in Oracle REST Data Services, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle REST Data Services. CVSS 3.1 Base Score 9.9 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).
{
"affected": [],
"aliases": [
"CVE-2026-46775"
],
"database_specific": {
"cwe_ids": [
"CWE-284",
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-28T21:16:31Z",
"severity": "CRITICAL"
},
"details": "Vulnerability in Oracle REST Data Services (component: Core). Supported versions that are affected are 24.2.0-26.1.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTPS to compromise Oracle REST Data Services. While the vulnerability is in Oracle REST Data Services, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle REST Data Services. CVSS 3.1 Base Score 9.9 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).",
"id": "GHSA-v3pj-p78r-2j24",
"modified": "2026-05-28T21:32:05Z",
"published": "2026-05-28T21:32:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46775"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cspumay2026.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-V3QX-X9JR-G987
Vulnerability from github – Published: 2022-05-24 17:16 – Updated: 2024-04-04 02:50In filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters with nested boolean expressions can result in denial of service (daemon crash).
{
"affected": [],
"aliases": [
"CVE-2020-12243"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-674"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-04-28T19:15:00Z",
"severity": "HIGH"
},
"details": "In filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters with nested boolean expressions can result in denial of service (daemon crash).",
"id": "GHSA-v3qx-x9jr-g987",
"modified": "2024-04-04T02:50:23Z",
"published": "2022-05-24T17:16:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-12243"
},
{
"type": "WEB",
"url": "https://bugs.openldap.org/show_bug.cgi?id=9202"
},
{
"type": "WEB",
"url": "https://git.openldap.org/openldap/openldap/-/blob/OPENLDAP_REL_ENG_2_4/CHANGES"
},
{
"type": "WEB",
"url": "https://git.openldap.org/openldap/openldap/-/commit/98464c11df8247d6a11b52e294ba5dd4f0380440"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2020/05/msg00001.html"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20200511-0003"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT211289"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/4352-1"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/4352-2"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2020/dsa-4666"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpuoct2020.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00016.html"
}
],
"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-V3R2-3FP4-RP46
Vulnerability from github – Published: 2021-12-10 20:05 – Updated: 2023-09-06 20:14paypal-adaptive through 0.4.2 manipulation of JavaScript objects resulting in Prototype Pollution. The PayPal function could be tricked into adding or modifying properties of Object.prototype using a __proto__ payload.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "paypal-adaptive"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.4.2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-7643"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2021-05-25T20:14:36Z",
"nvd_published_at": "2020-04-23T15:15:00Z",
"severity": "MODERATE"
},
"details": "paypal-adaptive through 0.4.2 manipulation of JavaScript objects resulting in Prototype Pollution. The PayPal function could be tricked into adding or modifying properties of Object.prototype using a `__proto__` payload.",
"id": "GHSA-v3r2-3fp4-rp46",
"modified": "2023-09-06T20:14:32Z",
"published": "2021-12-10T20:05:57Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-7643"
},
{
"type": "PACKAGE",
"url": "https://github.com/Ideame/paypal-adaptive-sdk-nodejs"
},
{
"type": "WEB",
"url": "https://github.com/Ideame/paypal-adaptive-sdk-nodejs/blob/master/lib/paypal-adaptive.js#L31"
},
{
"type": "WEB",
"url": "https://snyk.io/vuln/SNYK-JS-PAYPALADAPTIVE-565089"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L",
"type": "CVSS_V3"
}
],
"summary": "Prototype pollution in paypal-adaptive"
}
GHSA-V42F-CQ7V-587Q
Vulnerability from github – Published: 2022-05-17 04:42 – Updated: 2025-10-03 00:31Triangle MicroWorks SCADA Data Gateway before 3.00.0635 allows remote attackers to cause a denial of service (excessive data processing) via a crafted DNP3 packet.
{
"affected": [],
"aliases": [
"CVE-2014-2342"
],
"database_specific": {
"cwe_ids": [
"CWE-20",
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2014-05-30T23:55:00Z",
"severity": "MODERATE"
},
"details": "Triangle MicroWorks SCADA Data Gateway before 3.00.0635 allows remote attackers to cause a denial of service (excessive data processing) via a crafted DNP3 packet.",
"id": "GHSA-v42f-cq7v-587q",
"modified": "2025-10-03T00:31:00Z",
"published": "2022-05-17T04:42:41Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2014-2342"
},
{
"type": "WEB",
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-14-149-01"
},
{
"type": "WEB",
"url": "http://ics-cert.us-cert.gov/advisories/ICSA-14-149-01"
},
{
"type": "WEB",
"url": "http://www.trianglemicroworks.com/products/scada-data-gateway/what%27s-new"
}
],
"schema_version": "1.4.0",
"severity": []
}
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.