{"schemaVersion":3,"id":"CVE-2026-113601","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Memos before 0.27.0 contains a missing authorization vulnerability in the ActivityService ListActivities and GetActivity API methods that allows authenticated users to view all users' activity records. Low-privileged attackers can enumerate sequential activity IDs to obtain creator IDs, timestamps, and memo-comment references, including activity on other users' private memos.","dates":{"published":"2026-10-20T15:40:28.941Z","modified":"2026-10-20T15:40:28.941Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.3,"severity":"medium","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":5.3,"severity":"medium","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":4.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":5.3,"severity":"medium","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":4.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-862","name":"Missing Authorization","description":"The product does not perform an authorization check when an actor attempts to access a resource or perform an action.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/862.html"}],"affected":[{"vendor":"usememos","product":"memos","name":"memos","label":"memos","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 0.27.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.27.0","eol":null,"hubHref":"/vendor/usememos/memos"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/usememos/memos/issues/5651","label":"github.com/usememos/memos/issues/5651","hostname":"github.com","tags":["Issue Tracking"]},{"url":"https://github.com/usememos/memos/commit/04f239a2fc74f7090c779a6a7b8a08238fd31b88","label":"github.com/usememos/memos/commit/04f239a2fc74f7090c779a6a7b8a08238fd31b88","hostname":"github.com","tags":["Patch"]},{"url":"https://github.com/usememos/memos/releases/tag/v0.27.0","label":"github.com/usememos/memos/releases/tag/v0.27.0","hostname":"github.com","tags":["Release Notes"]},{"url":"https://github.com/usememos/memos/blob/v0.26.2/server/router/api/v1/activity_service.go","label":"github.com/usememos/memos/blob/v0.26.2/server/router/api/v1/activity_service.go","hostname":"github.com","tags":["Technical Description"]},{"url":"https://www.vulncheck.com/advisories/memos-before-0.27.0-missing-authorization-via-activityservice-listactivities-getactivity","label":"www.vulncheck.com/advisories/…","hostname":"www.vulncheck.com","tags":["Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-20T15:40:28.941Z","label":"Published","detail":"Vulnerability first disclosed.","source":null}],"risk":{"score":21,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T09:31:18.543Z","stale":false,"partial":false}}