Attribute-based access control, or ABAC, makes an access decision from facts about a request. Those facts may describe the user, the record, the operation, or the current environment. A policy evaluates them together before the protected action runs.
What an ABAC decision contains
An ABAC rule can express conditions that a role alone cannot. A support worker may read a record only when it belongs to their region and the case is assigned to their team. A service may update an object only in its own environment and during a defined workflow state.
| Attribute source | Example | Audit concern |
|---|---|---|
| Actor | Team, account, clearance | Who issued and updates the value? |
| Resource | Owner, tenant, classification | Is it loaded from trusted data? |
| Action | Read, approve, export | Does the policy name the real operation? |
| Environment | Time, network, deployment | Can the caller influence the condition? |
The policy is only as reliable as these inputs. A trusted role from a verified session differs from an account identifier copied directly from a request. The audit therefore traces each attribute to its source before evaluating the rule itself.
How policy becomes scattered
Generated features often express contextual rules as local conditionals. One handler checks the user's team, another checks the record owner, and a bulk action checks neither. Each condition may look reasonable in isolation while the product lacks one consistent access policy.
An audit of vibe-coded software groups equivalent operations and compares their attributes, policy logic, and denial behaviour. The review looks for defaults that allow access when an attribute is missing, stale values copied into tokens, and alternate paths that load different resource data.
The review follows a fixed sequence:
- Name the protected action: State the operation and resource precisely.
- List required attributes: Identify actor, resource, action, and environment inputs.
- Trace each source: Confirm that trusted code supplies the value.
- Locate enforcement: Find every route, job, and tool that can trigger the action.
- Exercise denial paths: Test missing, false, stale, and conflicting attributes.
ABAC and role-based access
Role-based access control can supply one attribute: the role assigned to the actor. ABAC adds context when the decision also depends on ownership, tenant, state, location, or another property. A system can use both models without conflict if the combined policy is explicit.
Problems appear when the implementation hides contextual rules inside role names. Roles such as eu-manager or approved-customer-editor can multiply because each name encodes several changing properties. An audit separates those properties so reviewers can see which fact controls each decision.
What verified enforcement looks like
The audit output ties every sensitive action to a policy, the attributes it consumes, and the code that enforces it. Tests use actors and resources with deliberately different attributes. They confirm that changing one required condition changes the decision and that denial prevents every side effect.
That evidence supports the production review of AI-generated code. ABAC does not require a particular policy engine. It requires a decision whose inputs, rules, and enforcement points can be inspected and tested.
