{"id":"CVE-2026-93853","revision":null,"records":[{"revision":"54f22e03b67f4fc988b4d554de58d86b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93853","aliases":[],"title":"Barman snapshot backup deletion trusts unverified backup catalog metadata","description":"Unverified ownership in Barman snapshot backup deletion allows a principal who can write the backup catalog to cause Barman to delete unrelated cloud snapshots. When a snapshot backup is deleted, either explicitly or by retention policy enforcement, Barman reads the snapshot identifiers from the backup.info file and passes them to the cloud provider's delete API using Barman's own credentials, without verifying that the snapshots belong to that backup. An attacker who can overwrite backup.info but lacks snapshot delete permissions can substitute the identifiers of other snapshots, causing Barman to delete any snapshot its cloud identity can reach on AWS, Microsoft Azure, or Google Cloud. Exploitation requires a deployment where the principal that writes the backup catalog is separate from the identity Barman uses to delete snapshots. Barman versions from 3.4.0 (Google Cloud), 3.6.0 (Azure), and 3.7.0 (AWS) up to and including 3.20.0 are affected. The issue is fixed in Barman 3.20.1.","state":0,"publishedAt":"2026-09-29T20:55:51.959+00:00","modifiedAt":"2026-09-30T15:28:16.037+00:00","affected":[{"ecosystem":"https://github.com/EnterpriseDB/barman","name":"Barman","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"EnterpriseDB\",\n                    \"product\": \"Barman\",\n                    \"collectionURL\": \"https://github.com/EnterpriseDB/barman\",\n                    \"versions\": [\n                        {\n                            \"version\": \"3.4.0\",\n                            \"status\": \"affected\",\n                            \"lessThan\": \"3.20.1\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H","score":7.2,"severity":"HIGH"}],"references":["https://www.enterprisedb.com/docs/security/advisories/cve202693853/"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93853","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93853","identifiers":["CVE-2026-93853"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-12T03:56:46.1287087+00:00","complete":true,"records":1779,"lastAttemptAt":"2026-11-12T03:56:46.1287087+00:00","lastSuccessAt":"2026-11-12T03:56:46.266109+00:00","error":null,"lastVerifiedAt":"2026-11-12T03:56:46.2661097+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-64752486c567b55b31fb0d7225f5222bcd0019564ac0ac5f0649e242c7b19299-beddb039e9e8d22605e2eaa29616069a8dbcaa39d8913522266b856ccc773385","complete":true,"records":424562,"lastAttemptAt":"2026-11-12T03:56:45.0720206+00:00","lastSuccessAt":"2026-11-12T03:56:45.0520395+00:00","error":null,"lastVerifiedAt":"2026-11-12T03:56:45.0720206+00:00","snapshotPublishedAt":"2026-11-12T03:29:06+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. 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-83f01e9b693347759bbcba1498652358","complete":false,"records":13760,"lastAttemptAt":"2026-11-12T04:06:30.4778921+00:00","lastSuccessAt":"2026-11-12T04:06:30.473+00:00","error":"350 identifier lookups failed; latest failures include AccessDenied (HTTP 403). Other identifiers were checked independently.","lastVerifiedAt":"2026-11-12T04:06:30.473+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13463,"expectedIdentifiers":13813,"failedIdentifiers":350},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-12T03:56:46.1287087+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-12T03:56:46.1287087+00:00","lastSuccessAt":"2026-11-12T03:56:46.2668013+00:00","error":null,"lastVerifiedAt":"2026-11-12T03:56:46.2668014+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-52451a58cbcb4287967102045f86ce70","complete":true,"records":13760,"lastAttemptAt":"2026-11-12T03:56:47.5828253+00:00","lastSuccessAt":"2026-11-12T03:56:47.579+00:00","error":null,"lastVerifiedAt":"2026-11-12T03:56:47.579+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13813,"expectedIdentifiers":13813,"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-3562b6c78fd1bd0f0b55daf66a0926ae24f65e462df7f6d928caad458fc696bf","complete":true,"records":9947,"lastAttemptAt":"2026-11-12T03:56:45.7079161+00:00","lastSuccessAt":"2026-11-11T04:27:43.6877707+00:00","error":null,"lastVerifiedAt":"2026-11-12T03:56:45.7079161+00:00","snapshotPublishedAt":"2026-11-11T03:32:46+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-456002455e0ab94bb92c95476d4e6d175c104cd594749982afd96c893728ecbc","complete":true,"records":2010,"lastAttemptAt":"2026-11-12T03:56:45.2248127+00:00","lastSuccessAt":"2026-11-11T02:36:58.1276999+00:00","error":null,"lastVerifiedAt":"2026-11-12T03:56:45.2248127+00:00","snapshotPublishedAt":"2026-11-11T01:17:51+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-baa8362b4daf9e5f39d5563775a55935e7b442c0735d33274a921579ce4a0d66","complete":true,"records":3093,"lastAttemptAt":"2026-11-12T03:56:46.0887439+00:00","lastSuccessAt":"2026-11-11T13:00:02.5446881+00:00","error":null,"lastVerifiedAt":"2026-11-12T03:56:46.0887439+00:00","snapshotPublishedAt":"2026-11-11T12:47:47+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-685fe7fb2b690656c910a1ea42a9d294e8353311ac8ecfa691a9b0ff1b328804","complete":true,"records":231695,"lastAttemptAt":"2026-11-12T03:56:45.6007038+00:00","lastSuccessAt":"2026-11-11T21:58:47.7265713+00:00","error":null,"lastVerifiedAt":"2026-11-12T03:56:45.6007038+00:00","snapshotPublishedAt":"2026-11-11T21:48:35+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}