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CVE-2026-55429 is a high-severity authorization flaw in Coder affecting versions prior to 2.29.7, 2.32.7, 2.33.8, and 2.34.2. The issue arises from the interaction between insertAgentApp, which accepts an application ID from the provisioner's CompleteJob payload without verifying that the ID belongs to the workspace currently being built, and UpsertWorkspaceApp, which overwrites an existing application's agent_id on a primary-key conflict. Because CompleteJob executes under dbauthz.AsProvisionerd, the authorization layer does not prevent this cross-workspace upsert. An attacker with elevated provisioning-related privileges can supply a victim application's identifier and cause that application to be rebound from its legitimate agent to an attacker-controlled agent in another workspace.
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workspace_apps rows before updating them and rejects cross-workspace agent reassignment. Fixed versions include 2.34.2 for the 2.34 branch, 2.33.8 for the 2.33 branch, 2.32.7 for affected 2.30 through 2.32 releases, and 2.29.17 for the 2.29 ESR and earlier affected versions identified by the advisory.No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
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4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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