CVE Catalog

CVE-2026-108711

MediumCVSS 4.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.28%

19th percentile - higher than 19% of all known CVEs

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 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.

Risk Assessment

Unauthorized access to workspace data can lead to exposure of sensitive instructions and configuration, potentially compromising system integrity and enabling unauthorized operations.

Recommendation

Update Honcho to a version newer than 3.3.0 and modify the authorization logic in get_or_create_workspace to account for key permissions. Rotate API keys and restrict permission scopes.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS