{"id":"GHSA-89g7-22c8-3j23","summary":"ux-live-component: Format-less date LiveProps parsed with the permissive DateTime constructor","details":"### Description\n\nWhen a `#[LiveProp]` is typed as a `DateTimeInterface` and no explicit `format` is configured, `Symfony\\UX\\LiveComponent\\LiveComponentHydrator::hydrateObjectValue()` falls back to `new $className($value)`. The `DateTime` / `DateTimeImmutable` constructors accept relative strings such as `\"now\"`, `\"tomorrow\"`, or `\"+10 years\"`, so a writable, format-less date prop can be pushed to an arbitrary point in time by the client. Components that rely on a date prop to gate time-based business logic can be moved past those checks by a frontend payload that no maintainer would consider a valid date.\n\n### Resolution\n\n`hydrateObjectValue()` now parses format-less date props strictly with `createFromFormat(DateTimeInterface::RFC3339, ...)`, matching the format already emitted by `dehydrateObjectValue()`. Normal round-trips are unaffected; only inputs that aren't valid RFC 3339 are now rejected, which is consistent with how a format-configured prop already behaved.\n\nThe patch for this issue is available [here](https://github.com/symfony/ux/commit/d24d78fda6df2d5964312255943ebf3a217b79a2) for branch 2.x (and forward-ported to 3.x).\n\n### Credits\n\nSymfony would like to thank Pascal Cescon for reporting the issue and Hugo Alliaume for providing the fix.","aliases":["CVE-2026-49208"],"modified":"2026-09-10T03:50:48.829554222Z","published":"2026-06-19T19:23:55Z","database_specific":{"cwe_ids":["CWE-20"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-06-19T19:23:55Z","nvd_published_at":null},"references":[{"type":"WEB","url":"https://github.com/symfony/ux/security/advisories/GHSA-89g7-22c8-3j23"},{"type":"WEB","url":"https://github.com/symfony/ux/commit/d24d78fda6df2d5964312255943ebf3a217b79a2"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/ux-live-component/CVE-2026-49208.yaml"},{"type":"PACKAGE","url":"https://github.com/symfony/ux"}],"affected":[{"package":{"name":"symfony/ux-live-component","ecosystem":"Packagist","purl":"pkg:composer/symfony/ux-live-component"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.8.0"},{"fixed":"2.36.0"}]}],"versions":["v2.10.0","v2.11.0","v2.11.1","v2.11.2","v2.12.0","v2.13.0","v2.13.1","v2.13.2","v2.13.3","v2.14.0","v2.14.1","v2.14.2","v2.15.0","v2.16.0","v2.17.0","v2.18.0","v2.18.1","v2.19.0","v2.19.2","v2.20.0","v2.21.0","v2.22.0","v2.22.1","v2.23.0","v2.24.0","v2.25.0","v2.25.1","v2.25.2","v2.26.0","v2.26.1","v2.27.0","v2.28.0","v2.28.1","v2.28.2","v2.29.0","v2.29.1","v2.29.2","v2.30.0","v2.31.0","v2.32.0","v2.33.0","v2.34.0","v2.35.0","v2.8.0","v2.8.1","v2.9.0","v2.9.1"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-89g7-22c8-3j23/GHSA-89g7-22c8-3j23.json"}},{"package":{"name":"symfony/ux-live-component","ecosystem":"Packagist","purl":"pkg:composer/symfony/ux-live-component"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.1.0"}]}],"versions":["v3.0.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-89g7-22c8-3j23/GHSA-89g7-22c8-3j23.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}]}