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.
{
"cna_assigner": "VulnCheck",
"cwe_ids": [
"CWE-863"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108711.json"
}{
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "3.3.0"
},
{
"fixed": "3.3.0"
}
],
"source": [
"AFFECTED_FIELD",
"DESCRIPTION"
]
}