Plastic Labs Honcho through 3.3.0 Incorrect Authorization via POST /v3/workspaces
Published Oct 11, 2026 · Updated Nov 3, 2026
Original summary
Normalized public record · Updated Nov 3, 2026
Plastic Labs Honcho through 3.3.0 Incorrect Authorization via POST /v3/workspaces
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
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.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- LOW
- Confidence
- Not available
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- hackmd.io ↗
- Source repository ↗
- Source repository ↗
- Source repository ↗
- Source repository ↗
- VulnCheck Advisory: Plastic Labs Honcho through 3.3.0 Incorrect Authorization via POST /v3/workspaces ↗
Record history
Published Oct 11, 2026 · Last refreshed Nov 3, 2026