Common Weakness Enumeration

CWE-400

Discouraged

Uncontrolled 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-MP3C-Q886-FVQV

Vulnerability from github – Published: 2026-05-11 21:31 – Updated: 2026-05-12 21:31
VLAI
Details

The issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Sonoma 14.8.7, macOS Tahoe 26.5, tvOS 26.5. An attacker on the local network may be able to cause a denial-of-service.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-43653"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-11T21:19:01Z",
    "severity": "MODERATE"
  },
  "details": "The issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Sonoma 14.8.7, macOS Tahoe 26.5, tvOS 26.5. An attacker on the local network may be able to cause a denial-of-service.",
  "id": "GHSA-mp3c-q886-fvqv",
  "modified": "2026-05-12T21:31:32Z",
  "published": "2026-05-11T21:31:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43653"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/127110"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/127111"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/127115"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/127117"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/127118"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-MP4C-VQQF-2QXG

Vulnerability from github – Published: 2022-01-21 00:00 – Updated: 2023-08-08 15:31
VLAI
Details

Due to the lack of media file checks before rendering, it was possible for an attacker to cause abnormal CPU consumption for message recipient by sending specially crafted gif image in LINE for Windows before 7.4.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2022-22820"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-01-20T12:15:00Z",
    "severity": "MODERATE"
  },
  "details": "Due to the lack of media file checks before rendering, it was possible for an attacker to cause abnormal CPU consumption for message recipient by sending specially crafted gif image in LINE for Windows before 7.4.",
  "id": "GHSA-mp4c-vqqf-2qxg",
  "modified": "2023-08-08T15:31:37Z",
  "published": "2022-01-21T00:00:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-22820"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/1357400"
    }
  ],
  "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-MP76-5XHH-VXVC

Vulnerability from github – Published: 2026-03-27 15:30 – Updated: 2026-03-27 15:30
VLAI
Details

A testdata data-source can be used to trigger out-of-memory crashes in Grafana.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-28375"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-27T15:16:51Z",
    "severity": "MODERATE"
  },
  "details": "A testdata data-source can be used to trigger out-of-memory crashes in Grafana.",
  "id": "GHSA-mp76-5xhh-vxvc",
  "modified": "2026-03-27T15:30:25Z",
  "published": "2026-03-27T15:30:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28375"
    },
    {
      "type": "WEB",
      "url": "https://grafana.com/security/security-advisories/cve-2026-28375"
    }
  ],
  "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-MPCF-4GMH-23W8

Vulnerability from github – Published: 2018-07-24 20:16 – Updated: 2023-09-11 22:05
VLAI
Summary
Regular Expression Denial of Service in forwarded
Details

Affected versions of forwarded are vulnerable to regular expression denial of service when parsing specially crafted user input.

Recommendation

Update to version 0.1.2 or later

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "forwarded"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.1.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2017-16118"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-06-16T21:46:42Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "Affected versions of `forwarded` are vulnerable to regular expression denial of service when parsing specially crafted user input.\n\n\n## Recommendation\n\nUpdate to version 0.1.2 or later",
  "id": "GHSA-mpcf-4gmh-23w8",
  "modified": "2023-09-11T22:05:14Z",
  "published": "2018-07-24T20:16:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-16118"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-mpcf-4gmh-23w8"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/advisories/527"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/104427"
    }
  ],
  "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"
    }
  ],
  "summary": "Regular Expression Denial of Service in forwarded"
}

GHSA-MPFC-53HR-W2MG

Vulnerability from github – Published: 2022-05-24 17:18 – Updated: 2024-04-04 02:50
VLAI
Details

An issue was discovered in libexif before 0.6.22. An unrestricted size in handling Canon EXIF MakerNote data could lead to consumption of large amounts of compute time for decoding EXIF data.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2020-13114"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-770"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-05-21T16:15:00Z",
    "severity": "HIGH"
  },
  "details": "An issue was discovered in libexif before 0.6.22. An unrestricted size in handling Canon EXIF MakerNote data could lead to consumption of large amounts of compute time for decoding EXIF data.",
  "id": "GHSA-mpfc-53hr-w2mg",
  "modified": "2024-04-04T02:50:53Z",
  "published": "2022-05-24T17:18:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-13114"
    },
    {
      "type": "WEB",
      "url": "https://github.com/libexif/libexif/commit/e6a38a1a23ba94d139b1fa2cd4519fdcfe3c9bab"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2020/05/msg00025.html"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202007-05"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4396-1"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00017.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-MPG4-RC92-VX8V

Vulnerability from github – Published: 2024-07-29 17:46 – Updated: 2024-10-11 14:13
VLAI
Summary
fast-xml-parser vulnerable to ReDOS at currency parsing
Details

Summary

A ReDOS that exists on currency.js was discovered by Gauss Security Labs R&D team.

Details

https://github.com/NaturalIntelligence/fast-xml-parser/blob/v4.4.0/src/v5/valueParsers/currency.js#L10 contains a vulnerable regex

PoC

pass the following string '\t'.repeat(13337) + '.'

Impact

Denial of service during currency parsing in experimental version 5 of fast-xml-parser-library

https://gauss-security.com

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "fast-xml-parser"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.3.5"
            },
            {
              "fixed": "4.4.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-41818"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1333",
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-07-29T17:46:16Z",
    "nvd_published_at": "2024-07-29T16:15:05Z",
    "severity": "HIGH"
  },
  "details": "### Summary\nA ReDOS that exists on currency.js was discovered by Gauss Security Labs R\u0026D team.\n\n### Details\nhttps://github.com/NaturalIntelligence/fast-xml-parser/blob/v4.4.0/src/v5/valueParsers/currency.js#L10 contains a vulnerable regex \n\n### PoC\npass the following string \u0027\\t\u0027.repeat(13337)  + \u0027.\u0027\n\n### Impact\nDenial of service during currency parsing in experimental version 5 of fast-xml-parser-library\n\nhttps://gauss-security.com",
  "id": "GHSA-mpg4-rc92-vx8v",
  "modified": "2024-10-11T14:13:07Z",
  "published": "2024-07-29T17:46:16Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-mpg4-rc92-vx8v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-41818"
    },
    {
      "type": "WEB",
      "url": "https://github.com/NaturalIntelligence/fast-xml-parser/commit/ba5f35e7680468acd7906eaabb2f69e28ed8b2aa"
    },
    {
      "type": "WEB",
      "url": "https://github.com/NaturalIntelligence/fast-xml-parser/commit/d0bfe8a3a2813a185f39591bbef222212d856164"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/NaturalIntelligence/fast-xml-parser"
    },
    {
      "type": "WEB",
      "url": "https://github.com/NaturalIntelligence/fast-xml-parser/blob/master/src/v5/valueParsers/currency.js#L10"
    }
  ],
  "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": "fast-xml-parser vulnerable to ReDOS at currency parsing"
}

GHSA-MPGP-FQH7-8MM2

Vulnerability from github – Published: 2025-03-31 21:32 – Updated: 2025-03-31 21:32
VLAI
Details

A vulnerability classified as problematic was found in Open Asset Import Library Assimp 5.4.3. This vulnerability affects the function Assimp::MDLImporter::ParseTextureColorData of the file code/AssetLib/MDL/MDLMaterialLoader.cpp of the component MDL File Handler. The manipulation of the argument mWidth/mHeight leads to resource consumption. The attack can be initiated remotely. Upgrading to version 6.0 is able to address this issue. The name of the patch is 5d2a7482312db2e866439a8c05a07ce1e718bed1. It is recommended to apply a patch to fix this issue.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-3016"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-404"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-03-31T21:15:53Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability classified as problematic was found in Open Asset Import Library Assimp 5.4.3. This vulnerability affects the function Assimp::MDLImporter::ParseTextureColorData of the file code/AssetLib/MDL/MDLMaterialLoader.cpp of the component MDL File Handler. The manipulation of the argument mWidth/mHeight leads to resource consumption. The attack can be initiated remotely. Upgrading to version 6.0 is able to address this issue. The name of the patch is 5d2a7482312db2e866439a8c05a07ce1e718bed1. It is recommended to apply a patch to fix this issue.",
  "id": "GHSA-mpgp-fqh7-8mm2",
  "modified": "2025-03-31T21:32:51Z",
  "published": "2025-03-31T21:32:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-3016"
    },
    {
      "type": "WEB",
      "url": "https://github.com/assimp/assimp/issues/6022"
    },
    {
      "type": "WEB",
      "url": "https://github.com/assimp/assimp/pull/6046"
    },
    {
      "type": "WEB",
      "url": "https://github.com/assimp/assimp/commit/5d2a7482312db2e866439a8c05a07ce1e718bed1"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.302068"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.302068"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.524593"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/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-MPQ4-RJJ8-FJPH

Vulnerability from github – Published: 2022-02-26 00:00 – Updated: 2022-03-07 13:42
VLAI
Summary
Uncontrolled Resource Consumption in github.com/google/fscrypt
Details

fscrypt through v0.3.2 creates a world-writable directory by default when setting up a filesystem, allowing unprivileged users to exhaust filesystem space. We recommend upgrading to fscrypt 0.3.3 or above and adjusting the permissions on existing fscrypt metadata directories where applicable.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/google/fscrypt"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.3.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-25326"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-03-01T19:25:48Z",
    "nvd_published_at": "2022-02-25T11:15:00Z",
    "severity": "MODERATE"
  },
  "details": "fscrypt through v0.3.2 creates a world-writable directory by default when setting up a filesystem, allowing unprivileged users to exhaust filesystem space. We recommend upgrading to fscrypt 0.3.3 or above and adjusting the permissions on existing fscrypt metadata directories where applicable.",
  "id": "GHSA-mpq4-rjj8-fjph",
  "modified": "2022-03-07T13:42:34Z",
  "published": "2022-02-26T00:00:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-25326"
    },
    {
      "type": "WEB",
      "url": "https://github.com/google/fscrypt/pull/346"
    },
    {
      "type": "WEB",
      "url": "https://github.com/google/fscrypt/commit/91aa3ebf42032ca783c41f9ec25d885875f66ddb"
    },
    {
      "type": "WEB",
      "url": "https://github.com/google/fscrypt"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Uncontrolled Resource Consumption in github.com/google/fscrypt"
}

GHSA-MQ2M-3XVQ-7J47

Vulnerability from github – Published: 2024-02-27 18:31 – Updated: 2024-08-28 00:32
VLAI
Details

In Srelay (the SOCKS proxy and Relay) v.0.4.8p3, a specially crafted network payload can trigger a denial of service condition and disrupt the service.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2024-25398"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-02-27T16:15:46Z",
    "severity": "HIGH"
  },
  "details": "In Srelay (the SOCKS proxy and Relay) v.0.4.8p3, a specially crafted network payload can trigger a denial of service condition and disrupt the service.",
  "id": "GHSA-mq2m-3xvq-7j47",
  "modified": "2024-08-28T00:32:14Z",
  "published": "2024-02-27T18:31:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-25398"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Nivedita-22/SRELAY-exploit-writeup/blob/main/Srelay.md"
    },
    {
      "type": "WEB",
      "url": "https://sourceforge.net/projects/socks-relay"
    }
  ],
  "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-MQ3P-RRMP-79JG

Vulnerability from github – Published: 2026-01-13 21:55 – Updated: 2026-01-13 21:55
VLAI
Summary
go-ethereum is vulnerable to high CPU usage leading to DoS via malicious p2p message
Details

Impact

An attacker can cause high CPU usage by sending a specially crafted p2p message. More details to be released later.

Credit

This issue was reported to the Ethereum Foundation Bug Bounty Program by @Yenya030

Show details on source website

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.16.7"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/ethereum/go-ethereum"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.16.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-22868"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20",
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-13T21:55:29Z",
    "nvd_published_at": "2026-01-13T21:15:54Z",
    "severity": "HIGH"
  },
  "details": "**Impact**\n\nAn attacker can cause high CPU usage by sending a specially crafted p2p message.\nMore details to be released later.\n\n**Credit**\n\nThis issue was reported to the Ethereum Foundation Bug Bounty Program by @Yenya030",
  "id": "GHSA-mq3p-rrmp-79jg",
  "modified": "2026-01-13T21:55:29Z",
  "published": "2026-01-13T21:55:29Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ethereum/go-ethereum/security/advisories/GHSA-mq3p-rrmp-79jg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22868"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ethereum/go-ethereum/commit/abeb78c647e354ed922726a1d719ac7bc64a07e2"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ethereum/go-ethereum"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "go-ethereum is vulnerable to high CPU usage leading to DoS via malicious p2p message"
}

Mitigation
Architecture and Design

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
Architecture and Design
  • 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
Architecture and Design

Ensure that protocols have specific limits of scale placed on them.

Mitigation
Implementation

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.