{"id":"CVE-2026-91157","revision":null,"records":[{"revision":"66cd87f321764a219f578f8ef4cf7219","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-91157","aliases":[],"title":"Discourse: Media uploads remain publicly accessible after category permissions are restricted","description":"Discourse is an open-source discussion platform. Prior to 2026.9.0, 2026.8.1, 2026.7.3, and 2026.1.9, sites with secure uploads enabled did not reconcile existing upload security metadata when a previously public category became read-restricted or when category permissions changed during a bulk import. Media and attachments uploaded while the category was public retained a public accessibility flag and remained reachable by anonymous users through their short upload URLs, including uploads associated with deleted topics. This issue is fixed in versions 2026.9.0, 2026.8.1, 2026.7.3, and 2026.1.9.","state":0,"publishedAt":"2026-10-14T15:37:02.24+00:00","modifiedAt":"2026-10-20T01:35:25.492+00:00","affected":[{"ecosystem":"Vendor product","name":"discourse","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"discourse\",\n                    \"product\": \"discourse\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2026.1.9\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 2026.7.0-latest, < 2026.7.3\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 2026.8.0-latest, < 2026.8.1\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 2026.9.0-latest, < 2026.9.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5,"severity":"HIGH"}],"references":["https://github.com/discourse/discourse/security/advisories/GHSA-298h-xgw6-4pv3","https://github.com/discourse/discourse/commit/16017732981fdb3ee65d7b3c69c573610bf02aab","https://github.com/discourse/discourse/commit/83f5f9f1df7ddc79ec0950e1b2038ba659635708","https://github.com/discourse/discourse/commit/98f1c021d0e956cded5239a5d8a6afe2b9e1b7e7","https://github.com/discourse/discourse/commit/b2fb98394b2636b29e850f06b0029f8ca8b48458"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-91157","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-91157","identifiers":["CVE-2026-91157"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-08T14:04:21.6524616+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-08T14:04:21.6524616+00:00","lastSuccessAt":"2026-11-08T14:04:21.8442875+00:00","error":null,"lastVerifiedAt":"2026-11-08T14:04:21.8442884+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-eaa64dac63caa79c8d4905619258c41c51b39e461b996124e1a21b5e85e7e738-4b0775bb0fc73c3ceeed66f8f17640894d61d654f97ee9386046b283ad9f9876","complete":true,"records":421100,"lastAttemptAt":"2026-11-08T14:04:21.1432513+00:00","lastSuccessAt":"2026-11-08T14:04:21.1228768+00:00","error":null,"lastVerifiedAt":"2026-11-08T14:04:21.1432513+00:00","snapshotPublishedAt":"2026-11-08T13:27:32+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-383c643166b94ac4b6a615647191978e","complete":true,"records":13654,"lastAttemptAt":"2026-11-08T14:04:47.6384375+00:00","lastSuccessAt":"2026-11-08T13:04:50.073+00:00","error":null,"lastVerifiedAt":"2026-11-08T13:04:50.073+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13706,"expectedIdentifiers":13706,"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":"2026-11-08T14:04:21.6524616+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-08T14:04:21.6524616+00:00","lastSuccessAt":"2026-11-08T14:04:21.8452187+00:00","error":null,"lastVerifiedAt":"2026-11-08T14:04:21.8452194+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-ceefbd28b79c4b75ac56c9c678246411","complete":false,"records":13666,"lastAttemptAt":"2026-11-08T14:04:46.9956646+00:00","lastSuccessAt":"2026-11-08T14:04:46.992+00:00","error":null,"lastVerifiedAt":"2026-11-08T14:04:46.992+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13185,"expectedIdentifiers":13706,"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-980593e6977a6d1b4fb1eed5a1ffe88a468736f89f0a06f710924ad59132c023","complete":true,"records":9914,"lastAttemptAt":"2026-11-08T14:04:21.5047325+00:00","lastSuccessAt":"2026-11-08T11:07:07.068788+00:00","error":null,"lastVerifiedAt":"2026-11-08T14:04:21.5047325+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+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-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-08T14:04:21.2941446+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-08T14:04:21.2941446+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+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-964c14035e6f0f6478b2870fad6a7ef9f6045876d4a12af2c2e514521e54b6af","complete":true,"records":3055,"lastAttemptAt":"2026-11-08T14:04:21.6167179+00:00","lastSuccessAt":"2026-11-08T11:07:12.1927025+00:00","error":null,"lastVerifiedAt":"2026-11-08T14:04:21.6167179+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+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-f8647d7ba64b1ba0dfdc7130944766d5b36d5b77d18fff0c79e651a4cff3c2b9","complete":true,"records":231293,"lastAttemptAt":"2026-11-08T14:04:21.3943214+00:00","lastSuccessAt":"2026-11-08T11:06:56.2918717+00:00","error":null,"lastVerifiedAt":"2026-11-08T14:04:21.3943214+00:00","snapshotPublishedAt":"2026-11-08T11:02:50+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}