{"id":"CVE-2026-55867","summary":"Graylog token revocation endpoint allows authenticated users to delete other users’ access tokens","details":"Graylog is a free and open log management platform. From 6.2.0 until 6.3.12, 7.0.7, and 7.1.2, the DELETE /users/{userId}/tokens/{idOrToken} endpoint implemented by UsersResource.revokeToken() in graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java checks USERS_TOKENREMOVE permission against the attacker-controlled userId path parameter before resolving the token selected by idOrToken. An authenticated user can provide an authorized userId while accessTokenService.loadById() or accessTokenService.load() resolves a token belonging to another user, including a service account or administrator, after which accessTokenService.destroy() deletes that token without checking AccessToken.getUserName(). The issue does not expose token contents, but unauthorized deletion causes integrity impact and can disrupt access-token-based integrations. This issue is fixed in versions 6.3.12, 7.0.7, and 7.1.2.","aliases":["GHSA-j769-9gv9-65gr"],"modified":"2026-08-30T08:17:31.133212Z","published":"2026-08-28T22:14:35.743Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-639"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55867.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55867.json"},{"type":"ADVISORY","url":"https://github.com/Graylog2/graylog2-server/security/advisories/GHSA-j769-9gv9-65gr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55867"},{"type":"FIX","url":"https://github.com/Graylog2/graylog2-server/commit/41d3745d0e52736d06c07d279ca0d72c1616df4c"},{"type":"FIX","url":"https://github.com/Graylog2/graylog2-server/commit/4f280138b53dc3bbb5749213e8cb1c8e372f23a2"},{"type":"FIX","url":"https://github.com/Graylog2/graylog2-server/commit/84b0ffa0bdf918f6edd2bb23a47254088634b1fc"},{"type":"FIX","url":"https://github.com/Graylog2/graylog2-server/commit/e5accc5f4ce48bd61b84bb8e5a13d21f8eac3da5"},{"type":"FIX","url":"https://github.com/Graylog2/graylog2-server/pull/26049"},{"type":"FIX","url":"https://github.com/Graylog2/graylog2-server/pull/26051"},{"type":"FIX","url":"https://github.com/Graylog2/graylog2-server/pull/26053"},{"type":"FIX","url":"https://github.com/Graylog2/graylog2-server/pull/26055"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/graylog2/graylog2-server","events":[{"introduced":"f35438d187e32050ff4d51e4fb93a70341982ceb"},{"introduced":"dac42698ecd7e1be0652802e6308c55b0fc5cdca"},{"introduced":"a9355313df2c2106f48684eb47617980ab4d42db"},{"fixed":"fd62097b3ac4d3f18641e973e4823ed9bf663122"},{"fixed":"5cd524ef532ecf6c77fe5efebcd0d2a5143f893c"},{"fixed":"adc626831f3170716845df46ae9237b7e93e1d7d"},{"fixed":"41d3745d0e52736d06c07d279ca0d72c1616df4c"},{"fixed":"4f280138b53dc3bbb5749213e8cb1c8e372f23a2"},{"fixed":"84b0ffa0bdf918f6edd2bb23a47254088634b1fc"},{"fixed":"e5accc5f4ce48bd61b84bb8e5a13d21f8eac3da5"}],"database_specific":{"extracted_events":[{"introduced":"6.2.0"},{"fixed":"6.3.12"},{"introduced":"7.0.0-alpha.1"},{"fixed":"7.0.7"},{"introduced":"7.1.0-alpha.1"},{"fixed":"7.1.2"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["7.1.1","7.1.0","7.1.0-rc.2","7.1.0-rc.1","7.1.0-beta.2","7.0.6","7.1.0-beta.1","7.1.0-alpha.3","7.0.5","7.0.4","7.1.0-alpha.2","7.0.3","7.0.2","7.1.0-alpha.1","7.0.1","7.0.0","7.0.0-rc.2","7.0.0-rc.1","7.0.0-beta.5","7.0.0-beta.4","7.0.0-beta.3","7.0.0-beta.2","7.0.0-beta.1","7.0.0-alpha.2","7.0.0-alpha.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55867.json","vanir_signatures_modified":"2026-08-30T08:17:31Z","vanir_signatures":[{"signature_type":"Line","signature_version":"v1","source":"https://github.com/graylog2/graylog2-server/commit/84b0ffa0bdf918f6edd2bb23a47254088634b1fc","target":{"file":"graylog2-server/src/test/java/org/graylog2/rest/resources/users/UsersResourceTest.java"},"deprecated":false,"digest":{"line_hashes":["295368719508396695023785709866863041565","271123227653825792802890504985920761783","193520922891013442279544008467245768823","95404190445655841866979607662353971351","237230490934632326664624861112730102690","123993329747089421496334943407972188652","75346638319631699244224929533130326618"],"threshold":0.9},"id":"CVE-2026-55867-2bc1f162"},{"target":{"file":"graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java"},"deprecated":false,"digest":{"threshold":0.9,"line_hashes":["198343310415006386537422207054284210802","172795118323590513781945283172438932199","335828493656977414860298202064652440164","334740112069284329908665999421806278592","242268432618238020999146333375926306333","258335049688956787604957068549566668503","232866151658578787972202196664451963619","18410288275292206068337962452299218730","942843258178895881071606268116120673","150560594450223640127881346758862433115","6006340583476593612749392589259554679","37548927507754163234360810516937138346","44583967945763920996826159524007252664","267920557632338034117803626447014332169","102216138070095780132096098821975062392"]},"id":"CVE-2026-55867-5189ff5f","signature_type":"Line","signature_version":"v1","source":"https://github.com/graylog2/graylog2-server/commit/e5accc5f4ce48bd61b84bb8e5a13d21f8eac3da5"},{"signature_type":"Line","signature_version":"v1","source":"https://github.com/graylog2/graylog2-server/commit/84b0ffa0bdf918f6edd2bb23a47254088634b1fc","target":{"file":"graylog2-server/src/main/java/org/graylog2/rest/resources/users/UsersResource.java"},"deprecated":false,"digest":{"line_hashes":["92649159899843690700169386539267723116","99234463948897691201042499467074891434","121913591008655909448279093711875224736","334740112069284329908665999421806278592","242268432618238020999146333375926306333","258335049688956787604957068549566668503","232866151658578787972202196664451963619","184102882752922060683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