{"id":"CVE-2026-108711","title":"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","summary":"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…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-863"],"published":"2026-10-11","updated":"2026-10-11","sourceUpdated":"2026-10-11T13:17:13.877","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-108711","references":[{"url":"https://github.com/plastic-labs/honcho","label":"disclosure@vulncheck.com"},{"url":"https://github.com/plastic-labs/honcho/blob/608aec8a928da13c540262ed980c569448fb53ab/src/crud/workspace.py#L112-L119","label":"disclosure@vulncheck.com"},{"url":"https://github.com/plastic-labs/honcho/blob/608aec8a928da13c540262ed980c569448fb53ab/src/routers/workspaces.py#L41-L72","label":"disclosure@vulncheck.com"},{"url":"https://github.com/plastic-labs/honcho/blob/608aec8a928da13c540262ed980c569448fb53ab/src/security.py#L218-L225","label":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@haind/honcho-scoped-jwt-workspace-config-disclosure","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/plastic-labs-honcho-through-3.3.0-incorrect-authorization-via-post-v3-workspaces","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"ingestedAt":"2026-10-11T13:51:17.024Z","slug":"CVE-2026-108711","body":"## Overview\n\nPlastic 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}