{"id":"CVE-2021-32742","aliases":["EUVD-2023-1859","GHSA-pqwh-c2f3-vxmq"],"status":"published","title":"Untrusted data fed into `Data.init(base32Encoded:)` can result in exposing server memory and/or crash","description":"Vapor is a web framework for Swift. In versions 4.47.1 and prior, bug in the `Data.init(base32Encoded:)` function opens up the potential for exposing server memory and/or crashing the server (Denial of Service) for applications where untrusted data can end up in said function. Vapor does not currently use this function itself so this only impact applications that use the impacted function directly or through other dependencies. The vulnerability is patched in version 4.47.2. As a workaround, one may use an alternative to Vapor's built-in `Data.init(base32Encoded:)`.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01199,"percentile":0.68548,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-502"],"published":"2021-07-09T14:00:11Z","modified":"2026-10-20T10:54:42Z","fixes":[{"ecosystem":"SwiftURL","package":"github.com/vapor/vapor","fixed_in":["4.47.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"SwiftURL","package":"github.com/vapor/vapor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.47.2"}]}]},{"source":"osv","ecosystem":"SwiftURL","package":"github.com/vapor/vapor","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.47.2"}]}]}],"products":[{"vendor":"vapor","product":"vapor"},{"vendor":"vapor_project","product":"vapor"}],"references":[{"url":"https://github.com/vapor/vapor/security/advisories/GHSA-pqwh-c2f3-vxmq","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://github.com/vapor/vapor/releases/tag/4.47.2","tags":["x_refsource_MISC","x_transferred","Release Notes","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-32742","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-pqwh-c2f3-vxmq"},{"url":"https://github.com/vapor/vapor","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-32742","title":"Untrusted data fed into `Data.init(base32Encoded:)` can result in exposing server memory and/or crash","description":"Vapor is a web framework for Swift. In versions 4.47.1 and prior, bug in the `Data.init(base32Encoded:)` function opens up the potential for exposing server memory and/or crashing the server (Denial of Service) for applications where untrusted data can end up in said function. Vapor does not currently use this function itself so this only impact applications that use the impacted function directly or through other dependencies. The vulnerability is patched in version 4.47.2. As a workaround, one may use an alternative to Vapor's built-in `Data.init(base32Encoded:)`.","status":"published","published":"2021-07-09T14:00:11Z","modified":"2024-08-03T23:33:54.911Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:33:07.014772Z"}],"euvd":[{"id":"EUVD-2023-1859","description":"Vapor is a web framework for Swift. In versions 4.47.1 and prior, bug in the `Data.init(base32Encoded:)` function opens up the potential for exposing server memory and/or crashing the server (Denial of Service) for applications where untrusted data can end up in said function. Vapor does not currently use this function itself so this only impact applications that use the impacted function directly or through other dependencies. The vulnerability is patched in version 4.47.2. As a workaround, one may use an alternative to Vapor's built-in `Data.init(base32Encoded:)`.","status":"published","published":"2021-07-09T14:00:11Z","modified":"2024-08-03T23:33:54Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T03:24:35.855495Z"}],"ghsa":[{"id":"GHSA-pqwh-c2f3-vxmq","title":"Untrusted data fed into `Data.init(base32Encoded:)` can result in exposing server memory and/or crash","description":"### Impact\nA bug in the `Data.init(base32Encoded:)` function opens up the potential for exposing server memory and/or crashing the server (Denial of Service) for applications where untrusted data can end up in said function. Vapor does not currently use this function itself so this only impact applications that use the impacted function directly or through other dependencies.\n\n### Patches\nThis issue has been patched in 4.47.2.\n\n### Workarounds\nUse an alternative to Vapor's built-in `Data.init(base32Encoded:)`.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [Vapor](https://github.com/vapor/vapor)\n* Ask in [Discord](http://vapor.team)","status":"published","published":"2023-06-09T19:31:54Z","modified":"2023-06-19T16:45:07Z","cwes":["CWE-502"],"updated_at":"2026-11-02T14:36:55.184601Z"}],"nvd":[{"id":"CVE-2021-32742","description":"Vapor is a web framework for Swift. In versions 4.47.1 and prior, bug in the `Data.init(base32Encoded:)` function opens up the potential for exposing server memory and/or crashing the server (Denial of Service) for applications where untrusted data can end up in said function. Vapor does not currently use this function itself so this only impact applications that use the impacted function directly or through other dependencies. The vulnerability is patched in version 4.47.2. As a workaround, one may use an alternative to Vapor's built-in `Data.init(base32Encoded:)`.","status":"published","published":"2021-07-09T14:15:07.987Z","modified":"2026-06-17T03:53:32.43Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":6.4,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:06:55.259633Z"}],"osv":[{"id":"CVE-2021-32742","description":"Vapor is a web framework for Swift. In versions 4.47.1 and prior, bug in the `Data.init(base32Encoded:)` function opens up the potential for exposing server memory and/or crashing the server (Denial of Service) for applications where untrusted data can end up in said function. Vapor does not currently use this function itself so this only impact applications that use the impacted function directly or through other dependencies. The vulnerability is patched in version 4.47.2. As a workaround, one may use an alternative to Vapor's built-in `Data.init(base32Encoded:)`.","status":"published","published":"2021-07-09T14:15:07.987Z","modified":"2026-10-20T10:54:42.741712573Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:19.793849Z"},{"id":"GHSA-pqwh-c2f3-vxmq","title":"Untrusted data fed into `Data.init(base32Encoded:)` can result in exposing server memory and/or crash","description":"### Impact\nA bug in the `Data.init(base32Encoded:)` function opens up the potential for exposing server memory and/or crashing the server (Denial of Service) for applications where untrusted data can end up in said function. Vapor does not currently use this function itself so this only impact applications that use the impacted function directly or through other dependencies.\n\n### Patches\nThis issue has been patched in 4.47.2.\n\n### Workarounds\nUse an alternative to Vapor's built-in `Data.init(base32Encoded:)`.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [Vapor](https://github.com/vapor/vapor)\n* Ask in [Discord](http://vapor.team)","status":"published","published":"2023-06-09T19:31:54Z","modified":"2026-07-08T06:29:25.268669379Z","cwes":["CWE-502"],"updated_at":"2026-11-02T15:46:53.700556Z"}]}}