{"id":"CVE-2026-15305","aliases":["EUVD-2026-43671","GHSA-mfqj-cqv3-h7xw","GHSA-p8pr-442q-qf8g"],"status":"published","title":"TYPO3 CMS - Unrestricted File Upload in Form Framework","description":"Users were able to upload files with arbitrary MIME types to forms using FileUpload or ImageUpload elements with allowedMimeTypes configured. The restriction was not enforced server-side because the MimeTypeValidator was registered during form building before concrete form definition properties were applied, resulting in the validator never being added to the processing pipeline. This issue affects TYPO3 CMS versions 14.2.0-14.3.4.","severity":{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00254,"percentile":0.1706,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-351"],"published":"2026-07-14T12:45:10Z","modified":"2026-10-28T02:31:13Z","fixes":[{"ecosystem":"Packagist","package":"typo3/cms-form","fixed_in":["14.3.5"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"typo3/cms-form","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"14.2.0"},{"last_affected":"14.3.4"},{"fixed":"14.3.5"}]}]},{"source":"osv","ecosystem":"Packagist","package":"typo3/cms-form","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"14.2.0"},{"fixed":"14.3.5"}]}],"versions":["v14.2.0","v14.3.0","v14.3.1","v14.3.2","v14.3.3","v14.3.4"]}],"products":[{"vendor":"typo3","product":"typo3 cms"}],"references":[{"url":"https://typo3.org/security/advisory/typo3-core-sa-2026-020","tags":["vendor-advisory","advisory","web"]},{"url":"https://github.com/TYPO3/typo3/commit/817ad41cc9dd28aac0fc4d0fe16fc25d46dd554a","tags":["patch","fix","web"]},{"url":"https://github.com/TYPO3/typo3/commit/cfda21050398eb145211a4fa6f9988f10e43e10b","tags":["patch","fix","web"]},{"url":"https://github.com/TYPO3/typo3/security/advisories/GHSA-mfqj-cqv3-h7xw","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-15305","tags":["advisory"]},{"url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-form/CVE-2026-15305.yaml","tags":["web"]},{"url":"https://news.typo3.com/security/advisory/typo3-core-sa-2026-020","tags":["web"]},{"url":"https://github.com/advisories/GHSA-mfqj-cqv3-h7xw"},{"url":"https://github.com/advisories/GHSA-p8pr-442q-qf8g"},{"url":"https://packagist.org","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15305.json","tags":["advisory"]},{"url":"https://github.com/TYPO3/typo3","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-15305","title":"TYPO3 CMS - Unrestricted File Upload in Form Framework","description":"Users were able to upload files with arbitrary MIME types to forms using FileUpload or ImageUpload elements with allowedMimeTypes configured. The restriction was not enforced server-side because the MimeTypeValidator was registered during form building before concrete form definition properties were applied, resulting in the validator never being added to the processing pipeline. This issue affects TYPO3 CMS versions 14.2.0-14.3.4.","status":"published","published":"2026-07-14T12:45:10.996Z","modified":"2026-07-15T12:26:56.912Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-351"],"updated_at":"2026-11-02T13:47:51.033687Z"}],"euvd":[{"id":"EUVD-2026-43671","description":"Users were able to upload files with arbitrary MIME types to forms using FileUpload or ImageUpload elements with allowedMimeTypes configured. The restriction was not enforced server-side because the MimeTypeValidator was registered during form building before concrete form definition properties were applied, resulting in the validator never being added to the processing pipeline. This issue affects TYPO3 CMS versions 14.2.0-14.3.4.","status":"published","published":"2026-07-14T12:45:10Z","modified":"2026-07-15T12:26:56Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:19:53.678292Z"}],"ghsa":[{"id":"GHSA-mfqj-cqv3-h7xw","title":"TYPO3 CMS - Unrestricted File Upload in Form Framework","description":"### Problem\nUsers were able to upload files with arbitrary MIME types to forms using _FileUpload_ or _ImageUpload_ elements with _allowedMimeTypes_ configured - uploading PHP files was **not** possible. The restriction was not enforced server-side because the _MimeTypeValidator_ was registered during form building before concrete form definition properties were applied, resulting in the validator never being added to the processing pipeline.\n\n### Solution\nUpdate to TYPO3 version 14.3.5 LTS that fixes the problem described.\n\n### Credits\nThanks to Sébastien Convers for reporting this issue, and to Josua Vogel and Oliver Hader for fixing it.","status":"published","published":"2026-08-31T19:53:59Z","modified":"2026-08-31T19:54:02Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-351"],"updated_at":"2026-11-02T14:41:08.084849Z"},{"id":"GHSA-p8pr-442q-qf8g","title":"Duplicate Advisory: TYPO3-CORE-SA-2026-020: TYPO3 CMS - Unrestricted File Upload in Form Framework","description":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-mfqj-cqv3-h7xw. This link is maintained to preserve external references.\n\n## Original Description\n\nUsers were able to upload files with arbitrary MIME types to forms using FileUpload or ImageUpload elements with allowedMimeTypes configured. The restriction was not enforced server-side because the MimeTypeValidator was registered during form building before concrete form definition properties were applied, resulting in the validator never being added to the processing pipeline. This issue affects TYPO3 CMS versions 14.2.0-14.3.5.","status":"withdrawn","published":"2026-07-14T15:32:15Z","modified":"2026-08-31T19:53:52Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/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","level":"medium"}],"cwes":["CWE-351"],"updated_at":"2026-11-02T14:41:08.084849Z"}],"nvd":[{"id":"CVE-2026-15305","description":"Users were able to upload files with arbitrary MIME types to forms using FileUpload or ImageUpload elements with allowedMimeTypes configured. The restriction was not enforced server-side because the MimeTypeValidator was registered during form building before concrete form definition properties were applied, resulting in the validator never being added to the processing pipeline. This issue affects TYPO3 CMS versions 14.2.0-14.3.4.","status":"published","published":"2026-07-14T13:18:16.27Z","modified":"2026-10-24T21:10:00.13Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/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","level":"medium","assessor":"secondary"}],"cwes":["CWE-351"],"updated_at":"2026-11-02T14:12:29.114188Z"}],"osv":[{"id":"CVE-2026-15305","title":"TYPO3 CMS - Unrestricted File Upload in Form Framework","description":"Users were able to upload files with arbitrary MIME types to forms using FileUpload or ImageUpload elements with allowedMimeTypes configured. The restriction was not enforced server-side because the MimeTypeValidator was registered during form building before concrete form definition properties were applied, resulting in the validator never being added to the processing pipeline. This issue affects TYPO3 CMS versions 14.2.0-14.3.4.","status":"published","published":"2026-07-14T12:45:10.996Z","modified":"2026-10-28T02:31:13.097518951Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-351"],"updated_at":"2026-11-02T15:44:57.682091Z"},{"id":"GHSA-mfqj-cqv3-h7xw","title":"TYPO3 CMS - Unrestricted File Upload in Form Framework","description":"### Problem\nUsers were able to upload files with arbitrary MIME types to forms using _FileUpload_ or _ImageUpload_ elements with _allowedMimeTypes_ configured - uploading PHP files was **not** possible. The restriction was not enforced server-side because the _MimeTypeValidator_ was registered during form building before concrete form definition properties were applied, resulting in the validator never being added to the processing pipeline.\n\n### Solution\nUpdate to TYPO3 version 14.3.5 LTS that fixes the problem described.\n\n### Credits\nThanks to Sébastien Convers for reporting this issue, and to Josua Vogel and Oliver Hader for fixing it.","status":"published","published":"2026-08-31T19:53:59Z","modified":"2026-08-31T20:25:45.219133Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-351"],"updated_at":"2026-11-02T15:46:51.811331Z"},{"id":"GHSA-p8pr-442q-qf8g","title":"Duplicate Advisory: TYPO3-CORE-SA-2026-020: TYPO3 CMS - Unrestricted File Upload in Form Framework","description":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-mfqj-cqv3-h7xw. This link is maintained to preserve external references.\n\n## Original Description\n\nUsers were able to upload files with arbitrary MIME types to forms using FileUpload or ImageUpload elements with allowedMimeTypes configured. The restriction was not enforced server-side because the MimeTypeValidator was registered during form building before concrete form definition properties were applied, resulting in the validator never being added to the processing pipeline. This issue affects TYPO3 CMS versions 14.2.0-14.3.5.","status":"withdrawn","published":"2026-07-14T15:32:15Z","modified":"2026-08-31T20:15:07.498010287Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/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","level":"medium"}],"cwes":["CWE-351"],"updated_at":"2026-11-02T15:46:52.891208Z"}]}}