{"id":"GO-2026-6286","revision":null,"records":[{"revision":"838cc55f317e45f08219f01ce02515e7","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-3433","aliases":[],"title":"Mattermost fails to scope role_updated websocket events to authorized team and channel members","description":"Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 fail to restrict role_updated websocket event broadcasts to members of the affected team or channel which allows an authenticated attacker with guest-level access to observe permission scheme change notifications for private teams they are not a member of via the websocket connection.. Mattermost Advisory ID: MMSA-2026-00616","state":0,"publishedAt":"2026-06-12T15:46:54.868+00:00","modifiedAt":"2026-06-12T17:19:49.97+00:00","affected":[{"ecosystem":"Vendor product","name":"Mattermost","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"product\": \"Mattermost\",\n                    \"vendor\": \"Mattermost\",\n                    \"versions\": [\n                        {\n                            \"lessThanOrEqual\": \"11.6.1\",\n                            \"status\": \"affected\",\n                            \"version\": \"11.6.0\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"lessThanOrEqual\": \"11.5.4\",\n                            \"status\": \"affected\",\n                            \"version\": \"11.5.0\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"lessThanOrEqual\": \"10.11.15\",\n                            \"status\": \"affected\",\n                            \"version\": \"10.11.0\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"lessThanOrEqual\": \"10.11.16\",\n                            \"status\": \"affected\",\n                            \"version\": \"10.11.0\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"11.7.0\",\n                            \"status\": \"unaffected\"\n                        },\n                        {\n                            \"version\": \"11.6.2\",\n                            \"status\": \"unaffected\"\n                        },\n                        {\n                            \"version\": \"11.5.5\",\n                            \"status\": \"unaffected\"\n                        },\n                        {\n                            \"version\": \"10.11.16\",\n                            \"status\": \"unaffected\"\n                        },\n                        {\n                            \"version\": \"10.11.17\",\n                            \"status\": \"unaffected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","score":4.3,"severity":"MEDIUM"}],"references":["https://mattermost.com/security-updates"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-3433","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-3433","identifiers":["CVE-2026-3433"]},"retained":false,"historicalAffected":[]},{"revision":"193bb42df4074fe19842c3df24bd6001","observedAt":"2026-11-15T10:07:07.306+00:00","statement":{"source":"euvd","id":"EUVD-2026-36498","aliases":["CVE-2026-3433","GHSA-rp4v-qc77-phm4"],"title":"Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 fail to restrict role_updated websocket event broadcasts to members of the affected team or channel which allows an authenticated attacker with…","description":"Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 fail to restrict role_updated websocket event broadcasts to members of the affected team or channel which allows an authenticated attacker with guest-level access to observe permission scheme change notifications for private teams they are not a member of via the websocket connection.. Mattermost Advisory ID: MMSA-2026-00616","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","score":4.3,"severity":null}],"references":["https://mattermost.com/security-updates"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-36498","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 12, 2026, 3:46:54 PM","dateUpdated":"Jun 12, 2026, 5:19:49 PM"},"relatedAdvisories":[{"id":"WID-SEC-W-2026-1529","title":"Mattermost Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff","vulnerabilityIds":["CVE-2026-3433","CVE-2026-6046","CVE-2026-6689","CVE-2026-6739","CVE-2026-6961","CVE-2026-7387"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-36498","identifiers":["EUVD-2026-36498","CVE-2026-3433","GHSA-rp4v-qc77-phm4"]},"retained":false,"historicalAffected":[]},{"revision":"2e17e162dbf347278d8c8034c61516dc","observedAt":"2026-10-25T08:17:29.602+00:00","statement":{"source":"nvd","id":"CVE-2026-3433","aliases":[],"title":"Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 fail to restrict role_updated websocket event broadcasts to members of the affected team or channel which allows an authenticated attacker with…","description":"Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 fail to restrict role_updated websocket event broadcasts to members of the affected team or channel which allows an authenticated attacker with guest-level access to observe permission scheme change notifications for private teams they are not a member of via the websocket connection.. Mattermost Advisory ID: MMSA-2026-00616","state":0,"publishedAt":"2026-06-12T17:16:22.467+00:00","modifiedAt":"2026-06-18T14:31:31.48+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · responsibledisclosure@mattermost.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","score":4.3,"severity":"MEDIUM"}],"references":["https://mattermost.com/security-updates"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-3433","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-200"],"productCriteria":["cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-06-12T17:16:22.467","lastModified":"2026-06-18T14:31:31.480"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-3433","identifiers":["CVE-2026-3433"]},"retained":false,"historicalAffected":[]},{"revision":"b21aae81344c4f6596db13f84fe94377","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-rp4v-qc77-phm4","aliases":["CVE-2026-3433","GO-2026-6286"],"title":"Mattermost doesn't restrict role_updated websocket event broadcasts to members of the affected team or channel","description":"Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 fail to restrict role_updated websocket event broadcasts to members of the affected team or channel, which allows an authenticated attacker with guest-level access to observe permission scheme change notifications for private teams they are not a member of via the websocket connection. Mattermost Advisory ID: MMSA-2026-00616","state":0,"publishedAt":"2026-06-12T18:31:59+00:00","modifiedAt":"2026-09-10T03:50:50.4924293+00:00","affected":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"11.6.0"},{"kind":"fixed","version":"11.6.1"}]}],"versions":["11.6.0"],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"11.5.0"},{"kind":"fixed","version":"11.5.5"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"10.11.0"},{"kind":"fixed","version":"10.11.17"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"8.0.0-20250731163400-5b955468ea1e"},{"kind":"fixed","version":"8.0.0-20260504071740-9408b98025d7"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://nvd.nist.gov/vuln/detail/CVE-2026-3433","https://github.com/mattermost/mattermost/pull/35497","https://github.com/mattermost/mattermost/pull/36256","https://github.com/mattermost/mattermost/pull/36257","https://github.com/mattermost/mattermost/pull/36341","https://github.com/mattermost/mattermost/commit/0a0ab0d54d899d308bd1352cc577036917500318","https://github.com/mattermost/mattermost/commit/7425c6817bf244f976c729f8a73cecac8039a1e1","https://github.com/mattermost/mattermost/commit/9408b98025d7364d7dfe7cdb28fcd109b1b595a6","https://github.com/mattermost/mattermost/commit/a30a331a29b9766d46716d4252056d7b74e66da0","https://github.com/mattermost/mattermost","https://github.com/mattermost/mattermost/releases/tag/v10.11.16","https://github.com/mattermost/mattermost/releases/tag/v11.5.5","https://github.com/mattermost/mattermost/releases/tag/v11.6.2","https://github.com/mattermost/mattermost/releases/tag/v11.7.0","https://mattermost.com/security-updates"],"sourceUrl":"https://github.com/advisories/GHSA-rp4v-qc77-phm4","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-rp4v-qc77-phm4","identifiers":["GHSA-rp4v-qc77-phm4","CVE-2026-3433","GO-2026-6286"]},"retained":false,"historicalAffected":[]},{"revision":"a13662012b7d4387a6a284955d1ba454","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6286","aliases":["CVE-2026-3433","GHSA-rp4v-qc77-phm4"],"title":"Mattermost doesn't restrict role_updated websocket event broadcasts to members of the affected team or channel in github.com/mattermost/mattermost-server","description":"Mattermost doesn't restrict role_updated websocket event broadcasts to members of the affected team or channel in github.com/mattermost/mattermost-server","state":0,"publishedAt":"2026-08-25T19:43:10+00:00","modifiedAt":"2026-08-26T01:19:16.5007983+00:00","affected":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"10.11.0+incompatible"},{"kind":"fixed","version":"10.11.17+incompatible"},{"kind":"introduced","version":"11.5.0+incompatible"},{"kind":"fixed","version":"11.5.5+incompatible"},{"kind":"introduced","version":"11.6.0+incompatible"},{"kind":"fixed","version":"11.6.1+incompatible"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v5","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v6","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"8.0.0-20250731163400-5b955468ea1e"},{"kind":"fixed","version":"8.0.0-20260504071740-9408b98025d7"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/advisories/GHSA-rp4v-qc77-phm4","https://nvd.nist.gov/vuln/detail/CVE-2026-3433","https://github.com/mattermost/mattermost/commit/0a0ab0d54d899d308bd1352cc577036917500318","https://github.com/mattermost/mattermost/commit/7425c6817bf244f976c729f8a73cecac8039a1e1","https://github.com/mattermost/mattermost/commit/9408b98025d7364d7dfe7cdb28fcd109b1b595a6","https://github.com/mattermost/mattermost/commit/a30a331a29b9766d46716d4252056d7b74e66da0","https://github.com/mattermost/mattermost/pull/35497","https://github.com/mattermost/mattermost/pull/36256","https://github.com/mattermost/mattermost/pull/36257","https://github.com/mattermost/mattermost/pull/36341","https://github.com/mattermost/mattermost/releases/tag/v10.11.16","https://github.com/mattermost/mattermost/releases/tag/v11.5.5","https://github.com/mattermost/mattermost/releases/tag/v11.6.2","https://github.com/mattermost/mattermost/releases/tag/v11.7.0","https://mattermost.com/security-updates"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-6286","license":"OSV · upstream source license applies","key":"osv:GO-2026-6286","identifiers":["GO-2026-6286","CVE-2026-3433","GHSA-rp4v-qc77-phm4"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-15T14:00:58.8747033+00:00","complete":true,"records":1781,"lastAttemptAt":"2026-11-15T14:00:58.8747033+00:00","lastSuccessAt":"2026-11-15T14:00:59.0227358+00:00","error":null,"lastVerifiedAt":"2026-11-15T14:00:59.0227405+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-7de4d7559a5263003f03d9f70577ab06f92ba4178309f26fce53e22a4a959294-e0d3f110789655b29baffcc6dfd284a37d48c3c85e8fdf69001ce2a2553683cc","complete":true,"records":425795,"lastAttemptAt":"2026-11-15T14:00:58.2568227+00:00","lastSuccessAt":"2026-11-15T14:00:58.2484273+00:00","error":null,"lastVerifiedAt":"2026-11-15T14:00:58.2568227+00:00","snapshotPublishedAt":"2026-11-15T13:17:58+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-541084f178a24fad8fc54152c649da70","complete":false,"records":13821,"lastAttemptAt":"2026-11-15T14:09:56.8311833+00:00","lastSuccessAt":"2026-11-15T14:09:55.813+00:00","error":"58 identifier lookups failed; latest failures include AccessDenied (HTTP 403). Other identifiers were checked independently.","lastVerifiedAt":"2026-11-15T14:09:55.813+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13607,"expectedIdentifiers":13874,"failedIdentifiers":58},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-15T14:00:58.8747033+00:00","complete":true,"records":1125,"lastAttemptAt":"2026-11-15T14:00:58.8747033+00:00","lastSuccessAt":"2026-11-15T14:00:59.0237887+00:00","error":null,"lastVerifiedAt":"2026-11-15T14:00:59.0237894+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-c167466b61b34733b7aedb2becc5e769","complete":true,"records":13833,"lastAttemptAt":"2026-11-15T14:01:07.9073093+00:00","lastSuccessAt":"2026-11-15T14:01:07.902+00:00","error":null,"lastVerifiedAt":"2026-11-15T14:01:07.902+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13874,"expectedIdentifiers":13874,"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-64eea06dbd27de8464d5dbce1b78cc794cc59e2d901516ae0d3ea76e624cdae0","complete":true,"records":9955,"lastAttemptAt":"2026-11-15T14:00:58.6576445+00:00","lastSuccessAt":"2026-11-14T13:57:23.1208135+00:00","error":null,"lastVerifiedAt":"2026-11-15T14:00:58.6576445+00:00","snapshotPublishedAt":"2026-11-14T13:17:57+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-f4424d7d4861b1af1404bd15abcb83f295dcd003412a9340ca99dc8200aa148a","complete":true,"records":2014,"lastAttemptAt":"2026-11-15T14:00:58.434525+00:00","lastSuccessAt":"2026-11-13T19:57:08.2864435+00:00","error":null,"lastVerifiedAt":"2026-11-15T14:00:58.434525+00:00","snapshotPublishedAt":"2026-11-13T19:33:10+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-6086d649bcb454cdf302d7d9275177bda73550e1b6e446b3520e9b6266d3582c","complete":true,"records":3148,"lastAttemptAt":"2026-11-15T14:00:58.7667639+00:00","lastSuccessAt":"2026-11-15T11:05:17.1034234+00:00","error":null,"lastVerifiedAt":"2026-11-15T14:00:58.7667639+00:00","snapshotPublishedAt":"2026-11-15T10:03:04+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-ff18f36f13fcca3a20a3fb9274b59b8872d18869a99071730e1e79b625c8f612","complete":true,"records":232475,"lastAttemptAt":"2026-11-15T14:00:58.5538131+00:00","lastSuccessAt":"2026-11-15T11:05:10.4195883+00:00","error":null,"lastVerifiedAt":"2026-11-15T14:00:58.5538131+00:00","snapshotPublishedAt":"2026-11-15T10:33:06+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}