{"id":"GHSA-8wvg-r2j4-3737","revision":"b624df2f78d845bc9e37c8d61a3755ab","records":[{"revision":"b624df2f78d845bc9e37c8d61a3755ab","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-8wvg-r2j4-3737","aliases":["GO-2026-6723"],"title":"Vikunja: Assignee email addresses disclosed to read-only project members via the task assignees endpoint","description":"### Summary\n`TaskAssginee.ReadAll` returns assignee user objects without blanking the `Email` field, disclosing assignee email addresses to any read-only project member. Every sibling path that returns user objects obfuscates the email; this one does not.\n\n### Details\n`pkg/models/task_assignees.go` (~lines 306-344) does `Select(\"users.*\")` and returns the result directly. `User.Email` is `json:\"email,omitempty\"`, so a non-empty value always serializes. The endpoint gates on `task.CanRead`, so a read-only member passes. Sibling paths blank the field: `pkg/models/tasks.go:530`, `pkg/models/project_users.go:216`, `pkg/models/teams.go:177`, `pkg/models/label_task.go:312`, `pkg/models/task_attachment.go:511`. The omission here reads as an oversight, not a decision.\n\nThe same file's `getRawTaskAssigneesForTasks` (~line 56) also selects `users.*` but is safe because its only caller (`addAssigneesToTasks`) blanks the email afterwards.\n\n### PoC (verified at runtime against v2.5.0, v1 and v2)\n```\nGET /api/v1/tasks/{id}/assignees   (reader with permission:0)\n-> [{\"id\":37,\"username\":\"...\",\"email\":\"assignee+SECRET@example.test\", ...}]\n```\nSame leak on `GET /api/v2/tasks/{id}/assignees` (routes through the identical model method). Contrast: `GET /api/v1/projects/{id}/projectusers` and the project task-embed both return the same users with no email.\n\n### Impact\nDisclosure of assignees' email addresses to users who should only see usernames. Read-only.\n\n### Fix\nBlank `Email` on each returned user in `TaskAssginee.ReadAll` before returning, matching the sibling paths. Covers v1 and v2 at once.","state":0,"publishedAt":"2026-10-09T20:54:49+00:00","modifiedAt":"2026-10-19T21:41:23.4051656+00:00","affected":[{"ecosystem":"Go","name":"code.vikunja.io/api","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"2.6.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","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","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/go-vikunja/vikunja/security/advisories/GHSA-8wvg-r2j4-3737","https://github.com/go-vikunja/vikunja/pull/3688","https://github.com/go-vikunja/vikunja","https://github.com/go-vikunja/vikunja/releases/tag/v2.6.0"],"sourceUrl":"https://github.com/advisories/GHSA-8wvg-r2j4-3737","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-8wvg-r2j4-3737","identifiers":["GHSA-8wvg-r2j4-3737","GO-2026-6723"]},"retained":false,"historicalAffected":[]}],"coverage":[]}