{"id":"CVE-2026-4286","revision":null,"records":[{"revision":"e93b092814d8494d978c58c88b5003f5","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-4286","aliases":[],"title":"Playbooks Plugin fails to validate team transfers, allowing unauthorized removal of member access via playbook update","description":"Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to check if {{team_id}} was being changed when updating playbooks, allowing users with only {{Manage Playbook Configurations}} permission to change a playbook's team, bypassing manage members restriction via PUT api. Mattermost Advisory ID: MMSA-2025-00552","state":0,"publishedAt":"2026-05-18T08:07:06.829+00:00","modifiedAt":"2026-05-18T12:41:28.632+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\": \"11.5.1\",\n                            \"status\": \"affected\",\n                            \"version\": \"11.5.0\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"lessThanOrEqual\": \"10.11.13\",\n                            \"status\": \"affected\",\n                            \"version\": \"10.11.0\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"11.6.0\",\n                            \"status\": \"unaffected\"\n                        },\n                        {\n                            \"version\": \"11.5.2\",\n                            \"status\": \"unaffected\"\n                        },\n                        {\n                            \"version\": \"10.11.14\",\n                            \"status\": \"unaffected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","score":3.1,"severity":"LOW"}],"references":["https://mattermost.com/security-updates"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-4286","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-4286","identifiers":["CVE-2026-4286"]},"retained":false,"historicalAffected":[]},{"revision":"598687cce3ad4c1b942cbc0ba7985159","observedAt":"2026-11-09T10:14:14.78+00:00","statement":{"source":"euvd","id":"EUVD-2026-30750","aliases":["CVE-2026-4286","GHSA-gvg4-jhmr-6j23"],"title":"Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to check if {{team_id}} was being changed when updating playbooks, allowing users with only {{Manage Playbook Configurations}} permission to change a playbook's team, bypassing …","description":"Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to check if {{team_id}} was being changed when updating playbooks, allowing users with only {{Manage Playbook Configurations}} permission to change a playbook's team, bypassing manage members restriction via PUT api. Mattermost Advisory ID: MMSA-2025-00552","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","score":3.1,"severity":null}],"references":["https://mattermost.com/security-updates"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-30750","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 18, 2026, 8:07:06 AM","dateUpdated":"May 18, 2026, 12:41:28 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-2026-30750","identifiers":["EUVD-2026-30750","CVE-2026-4286","GHSA-gvg4-jhmr-6j23"]},"retained":false,"historicalAffected":[]},{"revision":"83ea0eb1a1794795a0deb6c3f6579138","observedAt":"2026-10-25T10:17:15.856+00:00","statement":{"source":"nvd","id":"CVE-2026-4286","aliases":[],"title":"Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to check if {{team_id}} was being changed when updating playbooks, allowing users with only {{Manage Playbook Configurations}} permission to change a playbook's team, bypassing …","description":"Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to check if {{team_id}} was being changed when updating playbooks, allowing users with only {{Manage Playbook Configurations}} permission to change a playbook's team, bypassing manage members restriction via PUT api. Mattermost Advisory ID: MMSA-2025-00552","state":0,"publishedAt":"2026-05-18T09:16:22.99+00:00","modifiedAt":"2026-10-14T20:10:00.19+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · responsibledisclosure@mattermost.com · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","score":3.1,"severity":"LOW"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","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-2026-4286","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-863"],"productCriteria":["cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-05-18T09:16:22.990","lastModified":"2026-10-14T20:10:00.190"},"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-2026-4286","identifiers":["CVE-2026-4286"]},"retained":false,"historicalAffected":[]},{"revision":"03168986a063400c9bb71e702777b07a","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-gvg4-jhmr-6j23","aliases":["CVE-2026-4286","GO-2026-5404"],"title":"Mattermost doesn't check if {{team_id}} was being changed when updating playbooks","description":"Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to check if {{team_id}} was being changed when updating playbooks, allowing users with only {{Manage Playbook Configurations}} permission to change a playbook's team, bypassing manage members restriction via PUT api. Mattermost Advisory ID: MMSA-2025-00552","state":0,"publishedAt":"2026-05-18T09:31:48+00:00","modifiedAt":"2026-06-25T23:11:03.5394824+00:00","affected":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"11.5.0"},{"kind":"fixed","version":"11.5.2"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"10.11.0"},{"kind":"fixed","version":"10.11.14"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-plugin-playbooks","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.41.1-0.20260213020129-e1d6ec2c94e6"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"LOW"}],"references":["https://nvd.nist.gov/vuln/detail/CVE-2026-4286","https://github.com/mattermost/mattermost-plugin-playbooks/commit/e1d6ec2c94e695fb74e0c0c11c0d45e028bb96f3","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"sourceUrl":"https://github.com/advisories/GHSA-gvg4-jhmr-6j23","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-gvg4-jhmr-6j23","identifiers":["GHSA-gvg4-jhmr-6j23","CVE-2026-4286","GO-2026-5404"]},"retained":false,"historicalAffected":[]},{"revision":"ba87bfa5f57341c3979c8ec83d3042af","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-5404","aliases":["CVE-2026-4286","GHSA-gvg4-jhmr-6j23"],"title":"Mattermost doesn't check if {{team_id}} was being changed when updating playbooks in github.com/mattermost/mattermost-plugin-playbooks","description":"Mattermost doesn't check if {{team_id}} was being changed when updating playbooks in github.com/mattermost/mattermost-plugin-playbooks","state":0,"publishedAt":"2026-06-25T22:34:31+00:00","modifiedAt":"2026-06-25T23:00:16.0748377+00:00","affected":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-plugin-playbooks","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.41.1-0.20260213020129-e1d6ec2c94e6"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"10.11.0+incompatible"},{"kind":"fixed","version":"10.11.14+incompatible"},{"kind":"introduced","version":"11.5.0+incompatible"},{"kind":"fixed","version":"11.5.2+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":"0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/advisories/GHSA-gvg4-jhmr-6j23","https://nvd.nist.gov/vuln/detail/CVE-2026-4286","https://github.com/mattermost/mattermost-plugin-playbooks/commit/e1d6ec2c94e695fb74e0c0c11c0d45e028bb96f3","https://mattermost.com/security-updates"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-5404","license":"OSV · upstream source license applies","key":"osv:GO-2026-5404","identifiers":["GO-2026-5404","CVE-2026-4286","GHSA-gvg4-jhmr-6j23"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-09T23:04:35.5115198+00:00","complete":true,"records":1773,"lastAttemptAt":"2026-11-09T23:04:35.5115198+00:00","lastSuccessAt":"2026-11-09T23:04:35.7199619+00:00","error":null,"lastVerifiedAt":"2026-11-09T23:04:35.7199622+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-24e6fde7b744113daefb8f6135035fb8a5c69c9617c9c0d40574a0376532ffd3-dd2a77f649768340b3da193d98d597fa46c17d01cc081b31103212155ce6cd5d","complete":true,"records":421715,"lastAttemptAt":"2026-11-09T23:02:22.2942221+00:00","lastSuccessAt":"2026-11-09T23:02:22.1588494+00:00","error":null,"lastVerifiedAt":"2026-11-09T23:02:22.2942221+00:00","snapshotPublishedAt":"2026-11-09T22:27:08+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-47ea30d05491460caa5ce44b8cba58f9","complete":false,"records":13686,"lastAttemptAt":"2026-11-09T23:17:21.9523007+00:00","lastSuccessAt":"2026-11-09T23:17:21.948+00:00","error":"35 identifier lookups failed; latest failures include HTTP 403. Other identifiers were checked independently.","lastVerifiedAt":"2026-11-09T23:17:21.948+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13669,"expectedIdentifiers":13739,"failedIdentifiers":35},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-09T23:04:35.5115198+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T23:04:35.5115198+00:00","lastSuccessAt":"2026-11-09T23:04:35.7206951+00:00","error":null,"lastVerifiedAt":"2026-11-09T23:04:35.7206952+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-adb512372f6d42c7b17c6efd528c7d57","complete":false,"records":13692,"lastAttemptAt":"2026-11-09T23:05:02.0476605+00:00","lastSuccessAt":"2026-11-09T23:05:02.041+00:00","error":null,"lastVerifiedAt":"2026-11-09T23:05:02.041+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13704,"expectedIdentifiers":13739,"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-f16b02cc2b44d5413157015d03b8f1bf0217fdb477438e8f5866bcf35b179abd","complete":true,"records":9930,"lastAttemptAt":"2026-11-09T23:04:35.3476978+00:00","lastSuccessAt":"2026-11-09T23:04:34.9543246+00:00","error":null,"lastVerifiedAt":"2026-11-09T23:04:35.3476978+00:00","snapshotPublishedAt":"2026-11-09T23:03:07+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-26503967ae4379db8f374089589d6e03fb15bd31f820c9e992aaf93840c2236c","complete":true,"records":1971,"lastAttemptAt":"2026-11-09T23:02:22.4504307+00:00","lastSuccessAt":"2026-11-09T21:02:20.472473+00:00","error":null,"lastVerifiedAt":"2026-11-09T23:02:22.4504307+00:00","snapshotPublishedAt":"2026-11-09T20:18:18+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-761ecc9061239b0da572dc9254c6f384c1d19339eb08408c436647a2f26129e9","complete":true,"records":3064,"lastAttemptAt":"2026-11-09T23:04:35.4661135+00:00","lastSuccessAt":"2026-11-09T17:05:03.4044794+00:00","error":null,"lastVerifiedAt":"2026-11-09T23:04:35.4661135+00:00","snapshotPublishedAt":"2026-11-09T16:33:20+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-fe5caa127af053959ad6ee208ca92e895a6f5d3c14202fe035925df5f35ffed2","complete":true,"records":231329,"lastAttemptAt":"2026-11-09T23:04:24.8967882+00:00","lastSuccessAt":"2026-11-09T23:04:23.4601156+00:00","error":null,"lastVerifiedAt":"2026-11-09T23:04:24.8967882+00:00","snapshotPublishedAt":"2026-11-09T22:48:12+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}