Vulnerability details

CVE-2026-55429

coder coder

Coder's workspace app upsert allows cross-workspace agent rebinding via user-controlled app ID

CVSS 3.1
8.7High

Official description

Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, `UpsertWorkspaceApp` overwrites an existing app's `agent_id` on a primary-key conflict and `insertAgentApp` accepts the app ID from the provisioner's `CompleteJob` payload without verifying it belongs to the workspace being built. `CompleteJob` runs under `dbauthz.AsProvisionerd` so the authorization layer does not block the cross-workspace upsert. Exploitation requires elevated access as a template author or external provisioner operator. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 verifies that any existing `workspace_apps` row matching the supplied ID belongs to the workspace being built and rejects cross-workspace agent reassignment. No known workarounds are available.

CVSS scores

ScoreVersionSourceVector
8.7High 3.1 CVEProject cvelistV5 (CNA) (GitHub_M) CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

Affected products

VendorProductVersionsSource
coder coder < 2.29.17 CVEProject cvelistV5 (CNA)
coder coder >= 2.30.0, < 2.32.7 CVEProject cvelistV5 (CNA)
coder coder >= 2.33.0, < 2.33.8 CVEProject cvelistV5 (CNA)
coder coder >= 2.34.0, < 2.34.2 CVEProject cvelistV5 (CNA)

References and advisories

6
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Details

Published
2026-07-08
Last updated
2026-07-08
State
Published
Assigner (CNA)
GitHub_M

Exploit prediction (EPSS)

0.5%
Probability of exploitation in 30 days
43.6%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
No
Exploitation
None
Technical impact
Partial

Weaknesses (CWE)

  • CWE-639
    Authorization Bypass Through User-Controlled Key