EUVD-2026-30419
GHSA-23m9-rr4p-xpwh
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
6DescriptionNVD
Crabbox prior to v0.12.0 contains a privilege escalation vulnerability that allows users with shared visibility-only access to obtain Code, WebVNC, and Egress agent tickets by sending POST requests to ticket endpoints. Attackers can exploit insufficient access control checks on the /v1/leases/:id/code/ticket, /v1/leases/:id/webvnc/ticket, and /v1/leases/:id/egress/ticket endpoints to obtain bridge-agent tickets and impersonate trusted lease-side bridges despite having only visibility permissions.
AnalysisAI
Privilege escalation in Crabbox versions prior to v0.12.0 allows authenticated users with visibility-only permissions to escalate privileges and obtain code execution, remote desktop access, and data exfiltration capabilities. By directly invoking three unprotected ticket-generation endpoints (/v1/leases/:id/code/ticket, /v1/leases/:id/webvnc/ticket, /v1/leases/:id/egress/ticket), attackers can obtain bridge-agent credentials and impersonate trusted lease-side bridges, bypassing intended read-only access restrictions. …
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RemediationAI
Within 24 hours: Identify all Crabbox deployments and confirm current version (pre-v0.12.0 requires immediate action). Within 7 days: Upgrade all Crabbox instances to v0.12.0 or later; audit API access logs for /v1/leases/*/code/ticket, /v1/leases/*/webvnc/ticket, and /v1/leases/*/egress/ticket endpoint invocations by low-privilege accounts. …
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