{"id":"GHSA-c28q-m4gf-vg4q","revision":null,"records":[{"revision":"d4b11e8d1a1d439fac3215500aba4769","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-6689","aliases":[],"title":"*Missing* {{invite_user}} *permission check on team creation allows unprivileged users to set open-invite and allowed-domains team settings*","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 enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation (the check was only applied on update/patch), which allows an authenticated user holding PermissionCreateTeam but not PermissionInviteUser on the resulting team to configure invite-controlled team settings (make the team publicly joinable via open invite and/or constrain membership via allowed domains) that they are not permitted to set on an existing team via POST /api/v4/teams with allow_open_invite: true and/or a non-empty allowed_domains in the request body.. Mattermost Advisory ID: MMSA-2026-00655","state":0,"publishedAt":"2026-06-12T15:51:30.871+00:00","modifiedAt":"2026-06-12T17:18:52.426+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:N/I:L/A:N","score":4.3,"severity":"MEDIUM"}],"references":["https://mattermost.com/security-updates"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-6689","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-6689","identifiers":["CVE-2026-6689"]},"retained":false,"historicalAffected":[]},{"revision":"3ceb4afa8d5b45a7a00efadb5b2b42ec","observedAt":"2026-11-13T16:07:57.338+00:00","statement":{"source":"euvd","id":"EUVD-2026-36501","aliases":["CVE-2026-6689","GHSA-c28q-m4gf-vg4q"],"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 enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation (the check was only applied on update/…","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 enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation (the check was only applied on update/patch), which allows an authenticated user holding PermissionCreateTeam but not PermissionInviteUser on the resulting team to configure invite-controlled team settings (make the team publicly joinable via open invite and/or constrain membership via allowed domains) that they are not permitted to set on an existing team via POST /api/v4/teams with allow_open_invite: true and/or a non-empty allowed_domains in the request body.. Mattermost Advisory ID: MMSA-2026-00655","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:N/I:L/A:N","score":4.3,"severity":null}],"references":["https://mattermost.com/security-updates"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-36501","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 12, 2026, 3:51:30 PM","dateUpdated":"Jun 12, 2026, 5:18:52 PM"},"relatedAdvisories":[],"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-2026-36501","identifiers":["EUVD-2026-36501","CVE-2026-6689","GHSA-c28q-m4gf-vg4q"]},"retained":false,"historicalAffected":[]},{"revision":"2c988567fa74475e8da8fc1aee8da5f4","observedAt":"2026-10-25T15:18:51.467+00:00","statement":{"source":"nvd","id":"CVE-2026-6689","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 enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation (the check was only applied on update/…","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 enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation (the check was only applied on update/patch), which allows an authenticated user holding PermissionCreateTeam but not PermissionInviteUser on the resulting team to configure invite-controlled team settings (make the team publicly joinable via open invite and/or constrain membership via allowed domains) that they are not permitted to set on an existing team via POST /api/v4/teams with allow_open_invite: true and/or a non-empty allowed_domains in the request body.. Mattermost Advisory ID: MMSA-2026-00655","state":0,"publishedAt":"2026-06-12T17:16:27.18+00:00","modifiedAt":"2026-06-18T14:34:19.95+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:N/I:L/A:N","score":4.3,"severity":"MEDIUM"}],"references":["https://mattermost.com/security-updates"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-6689","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-862"],"productCriteria":["cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-06-12T17:16:27.180","lastModified":"2026-06-18T14:34:19.950"},"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-2026-6689","identifiers":["CVE-2026-6689"]},"retained":false,"historicalAffected":[]},{"revision":"872e3480edde4b8f8cfbfed7a52b1de9","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-c28q-m4gf-vg4q","aliases":["CVE-2026-6689","GO-2026-6283"],"title":"Mattermost doesn't enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation","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 enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation (the check was only applied on update/patch), which allows an authenticated user holding PermissionCreateTeam but not PermissionInviteUser on the resulting team to configure invite-controlled team settings (make the team publicly joinable via open invite and/or constrain membership via allowed domains) that they are not permitted to set on an existing team via POST /api/v4/teams with allow_open_invite: true and/or a non-empty allowed_domains in the request body.. Mattermost Advisory ID: MMSA-2026-00655","state":0,"publishedAt":"2026-06-12T18:31:59+00:00","modifiedAt":"2026-09-10T03:50:55.3024414+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":"8.0.0-20260501144115-7d6816abdfd1"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://nvd.nist.gov/vuln/detail/CVE-2026-6689","https://github.com/mattermost/mattermost/pull/36402","https://github.com/mattermost/mattermost/pull/36384","https://github.com/mattermost/mattermost/pull/36383","https://github.com/mattermost/mattermost/pull/36375","https://github.com/mattermost/mattermost/pull/36188","https://github.com/mattermost/mattermost/commit/977c791e5b54bc14fdb96a2b3dacc85da5d8c623","https://github.com/mattermost/mattermost/commit/7d6816abdfd170169f717aea43c5716a1f9ef6b0","https://github.com/mattermost/mattermost/commit/479fc42d0ec6da48e76b59608233d90bfc69769d","https://github.com/mattermost/mattermost/commit/3a96344214b1a84df70d97052d46b6f2b40b0caa","https://github.com/mattermost/mattermost/commit/2dea05864024b3254fb28c5ed679592e2b7cd672","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","https://github.com/mattermost/mattermost"],"sourceUrl":"https://github.com/advisories/GHSA-c28q-m4gf-vg4q","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-c28q-m4gf-vg4q","identifiers":["GHSA-c28q-m4gf-vg4q","CVE-2026-6689","GO-2026-6283"]},"retained":false,"historicalAffected":[]},{"revision":"d60e8b83eaf2475faacc8c4629462a00","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6283","aliases":["CVE-2026-6689","GHSA-c28q-m4gf-vg4q"],"title":"Mattermost doesn't enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation in github.com/mattermost/mattermost-server","description":"Mattermost doesn't enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation in github.com/mattermost/mattermost-server","state":0,"publishedAt":"2026-08-25T19:43:10+00:00","modifiedAt":"2026-08-26T01:19:26.1465205+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":"8.0.0-20260501144115-7d6816abdfd1"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/advisories/GHSA-c28q-m4gf-vg4q","https://nvd.nist.gov/vuln/detail/CVE-2026-6689","https://github.com/mattermost/mattermost/commit/2dea05864024b3254fb28c5ed679592e2b7cd672","https://github.com/mattermost/mattermost/commit/3a96344214b1a84df70d97052d46b6f2b40b0caa","https://github.com/mattermost/mattermost/commit/479fc42d0ec6da48e76b59608233d90bfc69769d","https://github.com/mattermost/mattermost/commit/7d6816abdfd170169f717aea43c5716a1f9ef6b0","https://github.com/mattermost/mattermost/commit/977c791e5b54bc14fdb96a2b3dacc85da5d8c623","https://github.com/mattermost/mattermost/pull/36188","https://github.com/mattermost/mattermost/pull/36375","https://github.com/mattermost/mattermost/pull/36383","https://github.com/mattermost/mattermost/pull/36384","https://github.com/mattermost/mattermost/pull/36402","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-2026-6283","license":"OSV · upstream source license applies","key":"osv:GO-2026-6283","identifiers":["GO-2026-6283","CVE-2026-6689","GHSA-c28q-m4gf-vg4q"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-15T10:02:17.3763497+00:00","complete":true,"records":1781,"lastAttemptAt":"2026-11-15T10:02:17.3763497+00:00","lastSuccessAt":"2026-11-15T10:02:17.6058686+00:00","error":null,"lastVerifiedAt":"2026-11-15T10:02:17.6058701+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-7de4d7559a5263003f03d9f70577ab06f92ba4178309f26fce53e22a4a959294-3113592d787b958ba87cf6300a2f439f8836169d49c36cdd65ca959c60a1acfe","complete":true,"records":425784,"lastAttemptAt":"2026-11-15T10:02:16.903149+00:00","lastSuccessAt":"2026-11-15T10:02:16.8893294+00:00","error":null,"lastVerifiedAt":"2026-11-15T10:02:16.903149+00:00","snapshotPublishedAt":"2026-11-15T09:28:12+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-ab7e83ec40d841f68d6d65c6dcc2aa85","complete":false,"records":13821,"lastAttemptAt":"2026-11-15T10:12:45.3805188+00:00","lastSuccessAt":"2026-11-15T10:12:45.374+00:00","error":"158 identifier lookups failed; latest failures include AccessDenied (HTTP 403). Other identifiers were checked independently.","lastVerifiedAt":"2026-11-15T10:12:45.374+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13573,"expectedIdentifiers":13874,"failedIdentifiers":158},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-15T10:02:17.3763497+00:00","complete":true,"records":1125,"lastAttemptAt":"2026-11-15T10:02:17.3763497+00:00","lastSuccessAt":"2026-11-15T10:02:17.760821+00:00","error":null,"lastVerifiedAt":"2026-11-15T10:02:17.7608224+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-d33b5144615b488f88b7a7390696bc39","complete":true,"records":13833,"lastAttemptAt":"2026-11-15T10:02:36.0431422+00:00","lastSuccessAt":"2026-11-15T10:02:36.038+00:00","error":null,"lastVerifiedAt":"2026-11-15T10:02:36.038+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":"2026-11-15T10:02:17.2383659+00:00","lastSuccessAt":"2026-11-14T13:57:23.1208135+00:00","error":null,"lastVerifiedAt":"2026-11-15T10:02:17.2383659+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":"2026-11-15T10:02:16.9649371+00:00","lastSuccessAt":"2026-11-13T19:57:08.2864435+00:00","error":null,"lastVerifiedAt":"2026-11-15T10:02:16.9649371+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-012aff9b2fb349d53e2c4bace6ca57956b6f5f9d82c1dc9fdc1c9b3c738f8977","complete":true,"records":3148,"lastAttemptAt":"2026-11-15T10:02:17.2553329+00:00","lastSuccessAt":"2026-11-14T04:57:03.8279646+00:00","error":null,"lastVerifiedAt":"2026-11-15T10:02:17.2553329+00:00","snapshotPublishedAt":"2026-11-14T03:02:50+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-878f718ccd076f540460423958c8e379b139b997b45858275573ecc4d702fe9a","complete":true,"records":232474,"lastAttemptAt":"2026-11-15T10:02:17.1321415+00:00","lastSuccessAt":"2026-11-15T05:33:06.8241102+00:00","error":null,"lastVerifiedAt":"2026-11-15T10:02:17.1321415+00:00","snapshotPublishedAt":"2026-11-15T04:33:08+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}