{"id":"CVE-2026-108711","published":"2026-10-11T13:17:13.877","lastModified":"2026-10-16T19:18:44.867","description":"Plastic Labs Honcho through 3.3.0 contains an incorrect authorization vulnerability that allows peer- or session-scoped API key holders to read workspace data because get_or_create_workspace checks only the workspace claim. Attackers can submit their parent workspace name to the POST /v3/workspaces endpoint to retrieve workspace metadata and configuration, including custom_instructions, reserved for workspace or admin keys.","cvssScore":4.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","cwes":["CWE-863"],"vendors":[],"products":[],"references":[{"url":"https://github.com/plastic-labs/honcho","tags":[]},{"url":"https://github.com/plastic-labs/honcho/blob/608aec8a928da13c540262ed980c569448fb53ab/src/crud/workspace.py#L112-L119","tags":[]},{"url":"https://github.com/plastic-labs/honcho/blob/608aec8a928da13c540262ed980c569448fb53ab/src/routers/workspaces.py#L41-L72","tags":[]},{"url":"https://github.com/plastic-labs/honcho/blob/608aec8a928da13c540262ed980c569448fb53ab/src/security.py#L218-L225","tags":[]},{"url":"https://hackmd.io/@haind/honcho-scoped-jwt-workspace-config-disclosure","tags":[]},{"url":"https://www.vulncheck.com/advisories/plastic-labs-honcho-through-3.3.0-incorrect-authorization-via-post-v3-workspaces","tags":[]}],"exploitRefs":[{"url":"https://github.com/plastic-labs/honcho","tags":[]},{"url":"https://github.com/plastic-labs/honcho/blob/608aec8a928da13c540262ed980c569448fb53ab/src/crud/workspace.py#L112-L119","tags":[]},{"url":"https://github.com/plastic-labs/honcho/blob/608aec8a928da13c540262ed980c569448fb53ab/src/routers/workspaces.py#L41-L72","tags":[]},{"url":"https://github.com/plastic-labs/honcho/blob/608aec8a928da13c540262ed980c569448fb53ab/src/security.py#L218-L225","tags":[]}],"hasPoc":true,"ai":null}