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Authorization Bypass (IDOR)Weakness · CWE-639

CVE-2026-8629

HIGH · 8.1 CVSS v3.1 Published 2026-05-14
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
87/100
Remediation priority · High
Remotely reachable Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-639

The application uses a user-supplied identifier to look up a record without checking that the requester actually owns it, so changing the identifier in a request returns someone else's data. This is the classic insecure-direct-object-reference — the change-the-ID-in-the-URL bug. Remediation is authorizing every object access against the acting user, not merely confirming they are logged in.

General guidance for the authorization bypass (idor) class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Patch available Apply the vendor patch
Vendor patch github.com →
Recommended fix High confidence

Crabbox v0.12.0

  1. 1. Identify the current Crabbox version by checking the running container or binary version (e.g., `crabbox --version` or checking container tags)
  2. 2. Back up the current Crabbox configuration and data directory
  3. 3. Stop the running Crabbox service
  4. 4. Upgrade to Crabbox v0.12.0 or later by pulling the new container image or downloading the updated binary
  5. 5. Verify the upgrade by checking the version: `crabbox --version` should show v0.12.0 or higher
  6. 6. Restart the Crabbox service
  7. 7. Test that the vulnerability is remediated by confirming visibility-only users can no longer access the /v1/leases/:id/code/ticket, /v1/leases/:id/webvnc/ticket, or /v1/leases/:id/egress/ticket endpoints
Caveat Review v0.12.0 release notes for any configuration or API changes before upgrading

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-8629 in production — separate from our analysis above.

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