{"id":"CVE-2026-55888","revision":null,"records":[{"revision":"59e545ddd2d244a1a57bcb2b1c0962fb","observedAt":"2026-10-23T16:01:20.601+00:00","statement":{"source":"cve-program","id":"CVE-2026-55888","aliases":[],"title":"XDG Desktop Portal: Arbitrary file access via SaveFiles \"files\" option path traversal","description":"XDG Desktop Portal is a desktop integration portal. Prior to version 1.22.1, malicious sandboxed applications can use the FileChooser.SaveFiles method to gain arbitrary file access to non-existing files on the host (limited to files the user has access to). The FileChooser.SaveFiles method takes optional filenames which get appended to the selected directory by backends. The backends are supposed to check that the file does not exist yet. The filenames are not validated by the frontend and also not by common backends. This issue has been patched in version 1.22.1.","state":0,"publishedAt":"2026-10-23T12:35:23.077+00:00","modifiedAt":"2026-10-23T12:35:23.077+00:00","affected":[{"ecosystem":"Vendor product","name":"xdg-desktop-portal","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"flatpak\",\n                    \"product\": \"xdg-desktop-portal\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.22.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N","score":8.8,"severity":"HIGH"}],"references":["https://github.com/flatpak/xdg-desktop-portal/security/advisories/GHSA-cm83-2936-gxjm","https://github.com/flatpak/xdg-desktop-portal/releases/tag/1.22.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-55888","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-55888","identifiers":["CVE-2026-55888"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-c36a7fe0de974a37853457110fab0c3a","complete":false,"records":5510,"lastAttemptAt":"2026-10-27T19:54:36.3089482+00:00","lastSuccessAt":"2026-10-27T19:54:36.5244436+00:00","error":null,"lastVerifiedAt":"2026-10-27T19:54:36.5244436+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-10-27T19:48:20.2022313+00:00","complete":true,"records":1093,"lastAttemptAt":"2026-10-27T19:48:20.2022313+00:00","lastSuccessAt":"2026-10-27T19:48:20.4010872+00:00","error":null,"lastVerifiedAt":"2026-10-27T19:48:20.4010877+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-3bd7ce170fa9469593b2b05a4c145743","complete":true,"records":13438,"lastAttemptAt":"2026-10-27T19:48:21.6831828+00:00","lastSuccessAt":"2026-10-27T19:48:21.679+00:00","error":null,"lastVerifiedAt":"2026-10-27T19:48:21.679+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13501,"expectedIdentifiers":13501,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-0a9352f15ff9b42ef0668815b17985da54b0862a5d24cb9a13f2a99c14c0f811","complete":true,"records":9785,"lastAttemptAt":"2026-10-27T19:48:20.0598535+00:00","lastSuccessAt":"2026-10-27T19:48:19.7606489+00:00","error":null,"lastVerifiedAt":"2026-10-27T19:48:20.0598535+00:00","snapshotPublishedAt":"2026-10-27T19:18:07+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-bad5d31e7f6a5e3d338e11d8789069b63620a403f927730769688b42f768e4f6","complete":true,"records":1965,"lastAttemptAt":"2026-10-27T19:46:06.3074736+00:00","lastSuccessAt":"2026-10-26T16:35:43.1460623+00:00","error":null,"lastVerifiedAt":"2026-10-27T19:46:06.3074736+00:00","snapshotPublishedAt":"2026-10-26T16:18:29+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-3a5b306d60fc44677a03a8afc99d87e6c5402770ef68d560f94a8c3ad3802b75","complete":true,"records":3001,"lastAttemptAt":"2026-10-27T19:48:20.1662846+00:00","lastSuccessAt":"2026-10-27T16:45:49.0050993+00:00","error":null,"lastVerifiedAt":"2026-10-27T19:48:20.1662846+00:00","snapshotPublishedAt":"2026-10-27T16:33:43+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-fc1c62e1c2d70dda08a497ed7a59029d5d84def9eb7702ebf314b9dadea06e2f","complete":true,"records":230836,"lastAttemptAt":"2026-10-27T19:48:10.3426958+00:00","lastSuccessAt":"2026-10-27T19:48:08.9643671+00:00","error":null,"lastVerifiedAt":"2026-10-27T19:48:10.3426958+00:00","snapshotPublishedAt":"2026-10-27T19:18:16+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}