{"id":"CVE-2022-31019","aliases":["EUVD-2023-1872","GHSA-qvxg-wjxc-r4gg"],"status":"published","title":"DoS Vulnerability in URLEncodedFormDecoder in Vapor","description":"Vapor is a server-side Swift HTTP web framework. When using automatic content decoding an attacker can craft a request body that can make the server crash with the following request: `curl -d \"array[_0][0][array][_0][0][array]$(for f in $(seq 1100); do echo -n '[_0][0][array]'; done)[string][_0]=hello%20world\" http://localhost:8080/foo`. The issue is unbounded, attacker controlled stack growth which will at some point lead to a stack overflow and a process crash. This issue has been fixed in version 4.61.1.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01663,"percentile":0.76871,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-120","CWE-121","CWE-674"],"published":"2022-06-06T21:05:20Z","modified":"2026-10-28T02:30:37Z","fixes":[{"ecosystem":"SwiftURL","package":"github.com/vapor/vapor","fixed_in":["4.61.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"SwiftURL","package":"github.com/vapor/vapor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.61.1"}]}]},{"source":"osv","ecosystem":"SwiftURL","package":"github.com/vapor/vapor","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.61.1"}]}]}],"products":[{"vendor":"vapor","product":"vapor"}],"references":[{"url":"https://github.com/vapor/vapor/security/advisories/GHSA-qvxg-wjxc-r4gg","tags":["x_refsource_CONFIRM","x_transferred","Mitigation","Third Party Advisory","advisory","web"]},{"url":"https://github.com/vapor/vapor/commit/6c63226a4ab82ce53730eb1afb9ca63866fcf033","tags":["x_refsource_MISC","x_transferred","Exploit","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-31019","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-qvxg-wjxc-r4gg"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/31xxx/CVE-2022-31019.json","tags":["advisory"]},{"url":"https://github.com/vapor/vapor","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2022-31019","title":"DoS Vulnerability in URLEncodedFormDecoder in Vapor","description":"Vapor is a server-side Swift HTTP web framework. When using automatic content decoding an attacker can craft a request body that can make the server crash with the following request: `curl -d \"array[_0][0][array][_0][0][array]$(for f in $(seq 1100); do echo -n '[_0][0][array]'; done)[string][_0]=hello%20world\" http://localhost:8080/foo`. The issue is unbounded, attacker controlled stack growth which will at some point lead to a stack overflow and a process crash. This issue has been fixed in version 4.61.1.","status":"published","published":"2022-06-06T21:05:20Z","modified":"2025-04-22T17:54:38.01Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:34:35.279735Z"}],"euvd":[{"id":"EUVD-2023-1872","description":"Vapor is a server-side Swift HTTP web framework. When using automatic content decoding an attacker can craft a request body that can make the server crash with the following request: `curl -d \"array[_0][0][array][_0][0][array]$(for f in $(seq 1100); do echo -n '[_0][0][array]'; done)[string][_0]=hello%20world\" http://localhost:8080/foo`. The issue is unbounded, attacker controlled stack growth which will at some point lead to a stack overflow and a process crash. This issue has been fixed in version 4.61.1.","status":"published","published":"2022-06-06T21:05:20Z","modified":"2025-04-22T17:54:38Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T20:52:15.540112Z"}],"ghsa":[{"id":"GHSA-qvxg-wjxc-r4gg","title":"Vapor vulnerable to denial of service in URLEncodedFormDecoder","description":"Vapor is an HTTP web framework for Swift. Vapor versions earlier than 4.61.1 are vulnerable to a denial of service in the URLEncodedFormDecoder.\n\n### Impact\nWhen using automatic content decoding, e.g. \n\n```swift\napp.post(\"foo\") { request -\u003e String in\n  let foo = try request.content.decode(Foo.self)\n  return \"\\(foo)\"\n}\n```\n\nAn attacker can craft a request body that can make the server crash with the following request:\n\n```\ncurl -d \"array[_0][0][array][_0][0][array]$(for f in $(seq 1100); do echo -n '[_0][0][array]'; done)[string][_0]=hello%20world\" http://localhost:8080/foo\n```\n\nThe issue is unbounded, attacker controlled stack growth which will at some point lead to a stack overflow.\n\n### Patches\nFixed in 4.61.1\n\n### Workarounds\nIf you don't need to decode Form URL Encoded data, you can disable the `ContentConfiguration` so it won't be used. E.g. in **configure.swift**\n\n```swift\nvar contentConfig = ContentConfiguration()\ncontentConfig.use(encoder: JSONEncoder.custom(dates: .iso8601), for: .json)\ncontentConfig.use(decoder: JSONDecoder.custom(dates: .iso8601), for: .json)\ncontentConfig.use(encoder: JSONEncoder.custom(dates: .iso8601), for: .jsonAPI)\ncontentConfig.use(decoder: JSONDecoder.custom(dates: .iso8601), for: .jsonAPI)\nContentConfiguration.global = contentConfig\n```\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [the Vapor repo](https://github.com/vapor/vapor)\n* Ask in [Vapor Discord](http://vapor.team)","status":"published","published":"2023-06-07T16:11:16Z","modified":"2023-06-30T20:15:42Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-120","CWE-121","CWE-674"],"updated_at":"2026-11-02T14:36:55.91458Z"}],"nvd":[{"id":"CVE-2022-31019","description":"Vapor is a server-side Swift HTTP web framework. When using automatic content decoding an attacker can craft a request body that can make the server crash with the following request: `curl -d \"array[_0][0][array][_0][0][array]$(for f in $(seq 1100); do echo -n '[_0][0][array]'; done)[string][_0]=hello%20world\" http://localhost:8080/foo`. The issue is unbounded, attacker controlled stack growth which will at some point lead to a stack overflow and a process crash. This issue has been fixed in version 4.61.1.","status":"published","published":"2022-06-09T13:15:08.393Z","modified":"2026-06-17T04:44:37.097Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-120","CWE-674"],"updated_at":"2026-11-02T14:07:21.62951Z"}],"osv":[{"id":"CVE-2022-31019","title":"DoS Vulnerability in URLEncodedFormDecoder in Vapor","description":"Vapor is a server-side Swift HTTP web framework. When using automatic content decoding an attacker can craft a request body that can make the server crash with the following request: `curl -d \"array[_0][0][array][_0][0][array]$(for f in $(seq 1100); do echo -n '[_0][0][array]'; done)[string][_0]=hello%20world\" http://localhost:8080/foo`. The issue is unbounded, attacker controlled stack growth which will at some point lead to a stack overflow and a process crash. This issue has been fixed in version 4.61.1.","status":"published","published":"2022-06-06T21:05:20Z","modified":"2026-10-28T02:30:37.524463564Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T15:44:25.516981Z"},{"id":"GHSA-qvxg-wjxc-r4gg","title":"Vapor vulnerable to denial of service in URLEncodedFormDecoder","description":"Vapor is an HTTP web framework for Swift. Vapor versions earlier than 4.61.1 are vulnerable to a denial of service in the URLEncodedFormDecoder.\n\n### Impact\nWhen using automatic content decoding, e.g. \n\n```swift\napp.post(\"foo\") { request -\u003e String in\n  let foo = try request.content.decode(Foo.self)\n  return \"\\(foo)\"\n}\n```\n\nAn attacker can craft a request body that can make the server crash with the following request:\n\n```\ncurl -d \"array[_0][0][array][_0][0][array]$(for f in $(seq 1100); do echo -n '[_0][0][array]'; done)[string][_0]=hello%20world\" http://localhost:8080/foo\n```\n\nThe issue is unbounded, attacker controlled stack growth which will at some point lead to a stack overflow.\n\n### Patches\nFixed in 4.61.1\n\n### Workarounds\nIf you don't need to decode Form URL Encoded data, you can disable the `ContentConfiguration` so it won't be used. E.g. in **configure.swift**\n\n```swift\nvar contentConfig = ContentConfiguration()\ncontentConfig.use(encoder: JSONEncoder.custom(dates: .iso8601), for: .json)\ncontentConfig.use(decoder: JSONDecoder.custom(dates: .iso8601), for: .json)\ncontentConfig.use(encoder: JSONEncoder.custom(dates: .iso8601), for: .jsonAPI)\ncontentConfig.use(decoder: JSONDecoder.custom(dates: .iso8601), for: .jsonAPI)\nContentConfiguration.global = contentConfig\n```\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [the Vapor repo](https://github.com/vapor/vapor)\n* Ask in [Vapor Discord](http://vapor.team)","status":"published","published":"2023-06-07T16:11:16Z","modified":"2023-11-08T04:09:22.722331Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-120","CWE-121","CWE-674"],"updated_at":"2026-11-02T15:46:55.122811Z"}]}}