{"id":"CVE-2026-50053","revision":null,"records":[{"revision":"cd9cddd69e5840eab013875a54bd119a","observedAt":"2026-10-23T16:01:20.601+00:00","statement":{"source":"cve-program","id":"CVE-2026-50053","aliases":[],"title":"Zimbra Collaboration Suite RestFilter Request Attribute Override via Unauthenticated URL Parameters","description":"A request attribute override vulnerability in Zimbra Collaboration Suite (ZCS) allows unauthenticated requests to /h/* to populate servlet attributes intended for trusted internal dispatch. RestFilter copies URL parameters specifying an authentication token, target account, target item and dispatch state into the request attributes consumed by the Classic Web Client. Combined with CVE-2026-10632 on ZCS 10.1.16, this allows an attacker to supply their own valid token and document identifiers and execute JavaScript in another user's signed-in browser session. ZCS 10.1.17 blocks that XSS chain by changing the document renderer, but retains the request attribute override.","state":0,"publishedAt":"2026-10-23T13:15:44.976+00:00","modifiedAt":"2026-10-23T13:38:40.748+00:00","affected":[{"ecosystem":"Vendor product","name":"Zimbra Collaboration Suite","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Zimbra\",\n                    \"product\": \"Zimbra Collaboration Suite\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThanOrEqual\": \"10.1.17\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N","score":8.7,"severity":"HIGH"}],"references":["https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories","https://www.rapid7.com/blog/post/ve-breaking-zimbra-identity-boundaries-part-1/"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-50053","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-50053","identifiers":["CVE-2026-50053"]},"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-adf88d03cfd2403d9823e6e6e47cec69","complete":false,"records":6234,"lastAttemptAt":"2026-10-27T21:00:12.1359803+00:00","lastSuccessAt":"2026-10-27T21:00:12.131+00:00","error":null,"lastVerifiedAt":"2026-10-27T21:00:12.131+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":1500,"expectedIdentifiers":13504,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-10-27T20:48:09.9692362+00:00","complete":true,"records":1093,"lastAttemptAt":"2026-10-27T20:48:09.9692362+00:00","lastSuccessAt":"2026-10-27T20:48:10.1586828+00:00","error":null,"lastVerifiedAt":"2026-10-27T20:48:10.158683+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-b6ebcde970374b7b95ff7d325ce5598d","complete":true,"records":13441,"lastAttemptAt":"2026-10-27T20:48:11.55355+00:00","lastSuccessAt":"2026-10-27T20:48:11.549+00:00","error":null,"lastVerifiedAt":"2026-10-27T20:48:11.549+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13504,"expectedIdentifiers":13504,"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":"2026-10-27T20:48:09.9022984+00:00","lastSuccessAt":"2026-10-27T19:48:19.7606489+00:00","error":null,"lastVerifiedAt":"2026-10-27T20:48:09.9022984+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":"2026-10-27T20:46:09.6864805+00:00","lastSuccessAt":"2026-10-26T16:35:43.1460623+00:00","error":null,"lastVerifiedAt":"2026-10-27T20:46:09.6864805+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":"2026-10-27T20:48:09.931048+00:00","lastSuccessAt":"2026-10-27T16:45:49.0050993+00:00","error":null,"lastVerifiedAt":"2026-10-27T20:48:09.931048+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-56d666cf8e7e535b1c609d0528ef336d3e0aa5628f907dd300100f6ed680e276","complete":true,"records":230840,"lastAttemptAt":"2026-10-27T20:48:09.7570686+00:00","lastSuccessAt":"2026-10-27T20:48:08.3443263+00:00","error":null,"lastVerifiedAt":"2026-10-27T20:48:09.7570686+00:00","snapshotPublishedAt":"2026-10-27T20:33:24+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}