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

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Summary

CVECVE-2026-55429
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-08 00:16:33 UTC
Updated2026-07-08 19:43:31 UTC
DescriptionCoder 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.

Risk And Classification

Primary CVSS: v3.1 8.7 HIGH from [email protected]

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

EPSS: 0.005080000 probability, percentile 0.397220000 (date 2026-07-09)

Problem Types: CWE-639 | CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.7HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
3.1CNADECLARED8.7HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Coder Coder All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Coder Coder affected >= 2.34.0, < 2.34.2 Not specified
CNA Coder Coder affected >= 2.33.0, < 2.33.8 Not specified
CNA Coder Coder affected >= 2.30.0, < 2.32.7 Not specified
CNA Coder Coder affected < 2.29.17 Not specified

References

ReferenceSourceLinkTags
github.com/coder/coder/releases/tag/v2.34.2 [email protected] github.com Release Notes
github.com/coder/coder/pull/26103 [email protected] github.com Issue Tracking, Patch
github.com/coder/coder/releases/tag/v2.29.17 [email protected] github.com Release Notes
github.com/coder/coder/releases/tag/v2.32.7 [email protected] github.com Release Notes
github.com/coder/coder/releases/tag/v2.33.8 [email protected] github.com Release Notes
github.com/coder/coder/security/advisories/GHSA-9rjw-3gwp-f59v [email protected] github.com Patch, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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