CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
5429 vulnerabilities reference this CWE, most recent first.
GHSA-Q2QR-3C2P-9235
Vulnerability from github – Published: 2022-02-15 01:57 – Updated: 2023-10-02 15:08HashiCorp Consul and Consul Enterprise could crash when configured with an abnormally-formed service-router entry. Introduced in 1.6.0, fixed in 1.6.6 and 1.7.4.
Specific Go Packages Affected
github.com/hashicorp/consul/agent/consul/discoverychain
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/hashicorp/consul"
},
"ranges": [
{
"events": [
{
"introduced": "1.6.0-beta1"
},
{
"fixed": "1.6.6"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/hashicorp/consul"
},
"ranges": [
{
"events": [
{
"introduced": "1.7.0"
},
{
"fixed": "1.7.4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-12758"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2021-05-13T14:26:25Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "HashiCorp Consul and Consul Enterprise could crash when configured with an abnormally-formed service-router entry. Introduced in 1.6.0, fixed in 1.6.6 and 1.7.4.\n### Specific Go Packages Affected\ngithub.com/hashicorp/consul/agent/consul/discoverychain",
"id": "GHSA-q2qr-3c2p-9235",
"modified": "2023-10-02T15:08:31Z",
"published": "2022-02-15T01:57:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-12758"
},
{
"type": "WEB",
"url": "https://github.com/hashicorp/consul/pull/7783"
},
{
"type": "WEB",
"url": "https://github.com/hashicorp/consul/commit/69b44fb9424cfdc05f1b7243876ab10d236ef1fc"
},
{
"type": "WEB",
"url": "https://github.com/hashicorp/consul/blob/v1.6.6/CHANGELOG.md"
},
{
"type": "WEB",
"url": "https://github.com/hashicorp/consul/blob/v1.7.4/CHANGELOG.md"
}
],
"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"
}
],
"summary": "Denial of Service (DoS) in HashiCorp Consul"
}
GHSA-Q2XF-JVWQ-327H
Vulnerability from github – Published: 2022-05-24 17:40 – Updated: 2022-05-24 17:40A vulnerability in the REST API of Cisco Managed Services Accelerator (MSX) could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to the way that the affected software logs certain API requests. An attacker could exploit this vulnerability by sending a flood of crafted API requests to an affected device. A successful exploit could allow the attacker to cause a DoS condition on the affected device.
{
"affected": [],
"aliases": [
"CVE-2021-1266"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-02-04T17:15:00Z",
"severity": "MODERATE"
},
"details": "A vulnerability in the REST API of Cisco Managed Services Accelerator (MSX) could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to the way that the affected software logs certain API requests. An attacker could exploit this vulnerability by sending a flood of crafted API requests to an affected device. A successful exploit could allow the attacker to cause a DoS condition on the affected device.",
"id": "GHSA-q2xf-jvwq-327h",
"modified": "2022-05-24T17:40:59Z",
"published": "2022-05-24T17:40:59Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-1266"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-msx-dos-4j7sytvU"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-Q2XX-F8R3-9MG5
Vulnerability from github – Published: 2024-06-17 21:31 – Updated: 2024-07-05 17:26Incorrect access control in the Kafka Connect REST API in the STRIMZI Project 0.41.0 and earlier allows an attacker to deny the service for Kafka Mirroring, potentially mirror the topics' content to his Kafka cluster via a malicious connector (bypassing Kafka ACL if it exists), and potentially steal Kafka SASL credentials, by querying the MirrorMaker Kafka REST API.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "io.strimzi:strimzi"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.41.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-36543"
],
"database_specific": {
"cwe_ids": [
"CWE-306",
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2024-06-18T16:34:17Z",
"nvd_published_at": "2024-06-17T19:15:58Z",
"severity": "HIGH"
},
"details": "Incorrect access control in the Kafka Connect REST API in the STRIMZI Project 0.41.0 and earlier allows an attacker to deny the service for Kafka Mirroring, potentially mirror the topics\u0027 content to his Kafka cluster via a malicious connector (bypassing Kafka ACL if it exists), and potentially steal Kafka SASL credentials, by querying the MirrorMaker Kafka REST API.",
"id": "GHSA-q2xx-f8r3-9mg5",
"modified": "2024-07-05T17:26:50Z",
"published": "2024-06-17T21:31:10Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-36543"
},
{
"type": "WEB",
"url": "https://github.com/almounah/vulnerability-research/tree/main/CVE-2024-36543"
},
{
"type": "PACKAGE",
"url": "https://github.com/strimzi/strimzi-kafka-operator"
},
{
"type": "WEB",
"url": "http://strimzi.com"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
}
],
"summary": "STRIMZI incorrect access control"
}
GHSA-Q322-WWM4-JWG5
Vulnerability from github – Published: 2025-04-10 09:30 – Updated: 2025-04-10 09:30A potential security vulnerability in HPE NonStop OSM Service Connection Suite could potentially be exploited to allow a local Denial of Service.
{
"affected": [],
"aliases": [
"CVE-2025-27081"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-04-10T09:15:16Z",
"severity": "MODERATE"
},
"details": "A potential security vulnerability in HPE NonStop OSM Service Connection Suite could potentially be exploited to allow a local Denial of Service.",
"id": "GHSA-q322-wwm4-jwg5",
"modified": "2025-04-10T09:30:26Z",
"published": "2025-04-10T09:30:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-27081"
},
{
"type": "WEB",
"url": "https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbns04836en_us\u0026docLocale=en_US"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-Q34H-PRV2-8P9P
Vulnerability from github – Published: 2022-05-24 17:30 – Updated: 2022-05-24 17:30On Juniper Networks EX4300-MP Series, EX4600 Series and QFX5K Series deployed in a Virtual Chassis configuration, receipt of a stream of specific layer 2 frames can cause high CPU load, which could lead to traffic interruption. This issue does not occur when the device is deployed in Stand Alone configuration. The offending layer 2 frame packets can originate only from within the broadcast domain where the device is connected. This issue affects Juniper Networks Junos OS on EX4300-MP Series, EX4600 Series and QFX5K Series: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2.
{
"affected": [],
"aliases": [
"CVE-2020-1689"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-10-16T21:15:00Z",
"severity": "MODERATE"
},
"details": "On Juniper Networks EX4300-MP Series, EX4600 Series and QFX5K Series deployed in a Virtual Chassis configuration, receipt of a stream of specific layer 2 frames can cause high CPU load, which could lead to traffic interruption. This issue does not occur when the device is deployed in Stand Alone configuration. The offending layer 2 frame packets can originate only from within the broadcast domain where the device is connected. This issue affects Juniper Networks Junos OS on EX4300-MP Series, EX4600 Series and QFX5K Series: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2.",
"id": "GHSA-q34h-prv2-8p9p",
"modified": "2022-05-24T17:30:55Z",
"published": "2022-05-24T17:30:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-1689"
},
{
"type": "WEB",
"url": "https://kb.juniper.net/JSA11086"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-Q34M-JH98-GWM2
Vulnerability from github – Published: 2024-10-25 19:44 – Updated: 2026-05-20 22:24Applications using Werkzeug to parse multipart/form-data requests are vulnerable to resource exhaustion. A specially crafted form body can bypass the Request.max_form_memory_size setting.
The Request.max_content_length setting, as well as resource limits provided by deployment software and platforms, are also available to limit the resources used during a request. This vulnerability does not affect those settings. All three types of limits should be considered and set appropriately when deploying an application.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 3.0.5"
},
"package": {
"ecosystem": "PyPI",
"name": "Werkzeug"
},
"ranges": [
{
"events": [
{
"introduced": "2.0.0rc1"
},
{
"fixed": "3.0.6"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "PyPI",
"name": "Quart"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.20.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-49767"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2024-10-25T19:44:43Z",
"nvd_published_at": "2024-10-25T20:15:04Z",
"severity": "MODERATE"
},
"details": "Applications using Werkzeug to parse `multipart/form-data` requests are vulnerable to resource exhaustion. A specially crafted form body can bypass the `Request.max_form_memory_size` setting.\n\n\nThe `Request.max_content_length` setting, as well as resource limits provided by deployment software and platforms, are also available to limit the resources used during a request. This vulnerability does not affect those settings. All three types of limits should be considered and set appropriately when deploying an application.",
"id": "GHSA-q34m-jh98-gwm2",
"modified": "2026-05-20T22:24:15Z",
"published": "2024-10-25T19:44:43Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/pallets/werkzeug/security/advisories/GHSA-q34m-jh98-gwm2"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-49767"
},
{
"type": "WEB",
"url": "https://github.com/pallets/quart/commit/5e78c4169b8eb66b91ead3e62d44721b9e1644ee"
},
{
"type": "WEB",
"url": "https://github.com/pallets/quart/commit/abb04a512496206de279225340ed022852fbf51f"
},
{
"type": "WEB",
"url": "https://github.com/pallets/werkzeug/commit/50cfeebcb0727e18cc52ffbeb125f4a66551179b"
},
{
"type": "WEB",
"url": "https://github.com/pallets/werkzeug/commit/cbb446fdcada7685fce936ded01b76c08dbd6eb5"
},
{
"type": "PACKAGE",
"url": "https://github.com/pallets/werkzeug"
},
{
"type": "WEB",
"url": "https://github.com/pallets/werkzeug/releases/tag/3.0.6"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20250103-0007"
}
],
"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:L/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Werkzeug possible resource exhaustion when parsing file data in forms"
}
GHSA-Q35C-JR5R-PRG7
Vulnerability from github – Published: 2024-06-24 15:31 – Updated: 2024-07-03 18:46In the Linux kernel, the following vulnerability has been resolved:
blk-cgroup: fix list corruption from reorder of WRITE ->lqueued
__blkcg_rstat_flush() can be run anytime, especially when blk_cgroup_bio_start is being executed.
If WRITE of ->lqueued is re-ordered with READ of 'bisc->lnode.next' in
the loop of __blkcg_rstat_flush(), next_bisc can be assigned with one
stat instance being added in blk_cgroup_bio_start(), then the local
list in __blkcg_rstat_flush() could be corrupted.
Fix the issue by adding one barrier.
{
"affected": [],
"aliases": [
"CVE-2024-38384"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-06-24T14:15:12Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-cgroup: fix list corruption from reorder of WRITE -\u003elqueued\n\n__blkcg_rstat_flush() can be run anytime, especially when blk_cgroup_bio_start\nis being executed.\n\nIf WRITE of `-\u003elqueued` is re-ordered with READ of \u0027bisc-\u003elnode.next\u0027 in\nthe loop of __blkcg_rstat_flush(), `next_bisc` can be assigned with one\nstat instance being added in blk_cgroup_bio_start(), then the local\nlist in __blkcg_rstat_flush() could be corrupted.\n\nFix the issue by adding one barrier.",
"id": "GHSA-q35c-jr5r-prg7",
"modified": "2024-07-03T18:46:25Z",
"published": "2024-06-24T15:31:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-38384"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/714e59b5456e4d6e4295a9968c564abe193f461c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/785298ab6b802afa75089239266b6bbea590809c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d0aac2363549e12cc79b8e285f13d5a9f42fd08e"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-Q37H-27PV-WPMC
Vulnerability from github – Published: 2026-01-20 15:33 – Updated: 2026-02-02 18:31A security issue exists within ArmorStart® LT that can result in a denial-of-service condition. During execution of the Achilles Comprehensive step limit storm tests, the device reboots
{
"affected": [],
"aliases": [
"CVE-2025-9281"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-01-20T14:16:10Z",
"severity": "HIGH"
},
"details": "A security issue exists within ArmorStart\u00ae LT that can result in a denial-of-service condition. During execution of the Achilles Comprehensive step limit storm tests, the device reboots",
"id": "GHSA-q37h-27pv-wpmc",
"modified": "2026-02-02T18:31:31Z",
"published": "2026-01-20T15:33:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-9281"
},
{
"type": "WEB",
"url": "https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1768.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"
},
{
"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-Q37V-9P49-P44F
Vulnerability from github – Published: 2024-02-03 03:30 – Updated: 2025-11-04 00:30IBM Security Access Manager Container (IBM Security Verify Access Appliance 10.0.0.0 through 10.0.6.1 and IBM Security Verify Access Docker 10.0.0.0 through 10.0.6.1) is vulnerable to a denial of service attacks on the DSC server. IBM X-Force ID: 254776.
{
"affected": [],
"aliases": [
"CVE-2023-31006"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-02-03T01:15:08Z",
"severity": "MODERATE"
},
"details": "IBM Security Access Manager Container (IBM Security Verify Access Appliance 10.0.0.0 through 10.0.6.1 and IBM Security Verify Access Docker 10.0.0.0 through 10.0.6.1) is vulnerable to a denial of service attacks on the DSC server. IBM X-Force ID: 254776.",
"id": "GHSA-q37v-9p49-p44f",
"modified": "2025-11-04T00:30:45Z",
"published": "2024-02-03T03:30:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-31006"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/254776"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7106586"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Nov/0"
}
],
"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-Q39W-9WFH-WWJF
Vulnerability from github – Published: 2023-05-10 15:30 – Updated: 2024-04-04 03:59Uncontrolled resource consumption in the Intel(R) Connect M Android application before version 1.82 may allow an authenticated user to potentially enable denial of service via local access.
{
"affected": [],
"aliases": [
"CVE-2022-41801"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-05-10T14:15:21Z",
"severity": "MODERATE"
},
"details": "Uncontrolled resource consumption in the Intel(R) Connect M Android application before version 1.82 may allow an authenticated user to potentially enable denial of service via local access.",
"id": "GHSA-q39w-9wfh-wwjf",
"modified": "2024-04-04T03:59:50Z",
"published": "2023-05-10T15:30:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-41801"
},
{
"type": "WEB",
"url": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00779.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/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.