Excess access is the real driver of modern insider threat risk

At a glance

What this is: This is an analysis of how excess access and privilege creep create insider threat exposure across SaaS, DevOps, and third-party environments.

Why it matters: It matters because IAM, IGA, PAM, and lifecycle teams must treat over-privilege as a governance problem that increases blast radius for human, NHI, and third-party identities.

By the numbers:

• 80% of organisations report their AI agents have already performed actions beyond their intended scope, including accessing unauthorised systems (39%), inappropriately sharing sensitive data (31%), and revealing access credentials (23%).
• 96% of technology professionals identify AI agents as a growing security threat, and 66% believe this risk is immediate.

👉 Read SecurEnds's analysis of insider threats caused by excess access

Context

Insider threat risk is not always a people problem in the narrow sense. In practice, it is often an access governance problem, where permissions outlive role changes, temporary exceptions never close, and third parties retain paths into systems they no longer need.

The article frames excess access as the root cause of modern insider risk across SaaS sprawl and DevOps-heavy environments. That is a familiar pattern for IAM and IGA teams: when entitlement hygiene breaks down, ordinary accounts acquire toxic combinations that expand blast radius, complicate accountability, and make detection slower.

Key questions

Q: What breaks when access reviews do not keep up with privilege creep?

A: When access reviews lag behind role changes, temporary projects, and system changes, excess permissions become normalised. The result is a wider blast radius for mistakes, fraud, and compromise. Reviews must be tied to active lifecycle events, otherwise they confirm yesterday’s access instead of governing today’s risk.

Q: Why do over-privileged users create more insider risk than simple account volume?

A: Over-privileged users can reach sensitive workflows, export data, or change systems without needing additional compromise. That means one identity can create outsized damage. Account volume matters less than whether an account holds permissions that combine into unsafe action paths.

Q: How do organisations know if least privilege is actually working?

A: Least privilege is working when users, contractors, and vendors only retain permissions that match their current role and there are no lingering high-risk combinations. The clearest signal is that role changes and exits trigger immediate entitlement reduction, not delayed cleanup.

Q: Who should be accountable when a vendor account with excess access causes harm?

A: Accountability should sit with the business owner, IAM governance team, and system owner who approved or failed to remove the access. Vendor access is still governed access, so it belongs in the same review, revocation, and audit process as employee access.

Technical breakdown

Privilege creep and toxic permissions in modern access estates

Privilege creep happens when permissions accumulate over time through promotions, project work, emergency access, or role overlap. Toxic permissions appear when individually acceptable entitlements combine into a dangerous access path, such as approval plus payment or development plus production. In SaaS and DevOps environments, these combinations are often distributed across tools rather than visible in one system, which is why static role models miss them. The technical issue is not just excess access, but hidden permission adjacency across systems and time.

Practical implication: map entitlement combinations across platforms, not just single-system roles, to expose toxic paths before they are used.

Why lifecycle failures turn temporary access into standing risk

Temporary access is safe only when expiration, offboarding, and entitlement review are reliable. The article shows the familiar failure mode: temporary privileges granted for projects or support work remain active long after the task ends. That turns short-lived access into standing access, which increases both misuse risk and the blast radius of compromise. Lifecycle failures are especially damaging when they affect third parties, because vendor access often escapes the same scrutiny as employee access.

Practical implication: enforce joiner-mover-leaver controls and expiration checks for employees, contractors, and vendors in the same governance process.

How over-privileged accounts amplify insider and external attacks

An over-privileged account is dangerous whether the misuse is accidental, malicious, or the result of compromise. Once an attacker takes over such an account, they inherit the same excessive permissions as the legitimate user, which can enable lateral movement, data theft, or ransomware spread. The article’s examples show that internal misuse and external compromise often converge on the same failure point: access boundaries that were never tightened back down after business need changed.

Practical implication: treat privileged access reduction as both insider-risk control and breach-containment control.

Threat narrative

Attacker objective: The objective is to exploit trusted access to move laterally, abuse sensitive workflows, and cause financial, operational, or compliance harm without early detection.

1. Entry occurs when a legitimate employee, contractor, or vendor account retains more access than the current role requires, creating an internal foothold with broad system reach.
2. Escalation occurs when privilege creep and toxic permission combinations let that account access production data, approval workflows, or administrative functions beyond intended scope.
3. Impact occurs through unauthorized fund movement, data export, production disruption, fraud, or wider compromise when the over-privileged account is misused or taken over.

Breaches seen in the wild

• LiteLLM PyPI package breach — LiteLLM PyPI supply chain attack, credentials stolen from users.
• Shai Hulud npm malware campaign — Shai Hulud campaign: npm malware exposed secrets on GitHub.

Read our 52 NHI Breaches Analysis report for a comprehensive view of breaches impacting Non-Human Identities including AI Agents.

NHI Mgmt Group analysis

Excess access is the governance failure behind most insider threat stories. The article is right to centre privilege creep and toxic permissions rather than malicious intent alone. The deeper issue is that access decisions were allowed to persist after business need changed, which means the programme failed at lifecycle control, not just detection. IAM and IGA teams should treat over-access as a structural control breakdown, not an exception to investigate after the fact.

Toxic permission combinations are a named risk category, not a side effect. When approval rights, payment rights, production rights, or administrative rights accumulate in one identity, the organisation creates an internal attack path that may look legitimate in isolation. That is why SoD enforcement remains relevant across human users, vendors, and service accounts alike. The practitioner conclusion is simple: review combination risk, not only entitlement count.

Privilege creep as hidden blast radius: permissions that seem harmless individually can become materially dangerous once they cross systems and lifecycle stages. That concept matters because modern estates fragment authority across SaaS, cloud, and DevOps tools, which means over-access is often invisible until an incident or audit surfaces it. The implication is that governance must measure access adjacency and persistence, not just whether a role exists.

Third-party access is now part of the insider threat perimeter. The article correctly includes vendors and contractors because internal risk increasingly arrives through external identities with internal reach. That changes how IAM, PAM, and access review teams should think about trust: the question is not whether the user is employed here, but whether the identity still needs the access it has. Practitioners should fold third parties into the same entitlement governance model as employees.

Continuous access review only works when it is tied to role change and exit events. Periodic review alone will miss short-lived privilege drift, especially in fast-moving engineering and operations teams. The practical lesson for the field is that access governance must be event-aware, because stale entitlements create a standing opportunity for misuse, error, and compromise.

From our research:

• 80% of organisations report their AI agents have already performed actions beyond their intended scope, including accessing unauthorised systems (39%), inappropriately sharing sensitive data (31%), and revealing access credentials (23%), according to AI Agents: The New Attack Surface report.
• 52% of companies can track and audit the data their AI agents access, leaving 48% with a complete blind spot for compliance and breach investigation, according to AI Agents: The New Attack Surface report.
• That visibility gap becomes more dangerous as organisations expand AI use, so teams should compare their access governance model with OWASP NHI Top 10 and the NIST Cybersecurity Framework 2.0.

What this signals

Toxic permission debt: access that is temporarily justified but never removed behaves like hidden risk capital inside the estate. The more SaaS and DevOps tools an organisation uses, the more likely it is that stale access will accumulate faster than review cycles can remove it.

The practical signal for identity programmes is that entitlement governance has to become event-driven. Role change, project exit, vendor offboarding, and production access elevation should all trigger immediate review, because periodic certification alone will always lag behind real access state.

Organisations that want to reduce insider-risk exposure should treat over-access as a measurable boundary problem, not an abstract policy concern. That means mapping where permissions persist, where SoD is violated, and where access review findings are actually translated into removal actions.

For practitioners

• Reconcile role changes against active entitlements Compare current job function, project assignment, and business owner approval against actual entitlements at each mover event. Remove permissions that no longer match the role, especially where production, finance, or administrative access remains after a change.
• Identify toxic permission combinations across systems Look for combinations such as approve-and-pay, develop-and-deploy, or read-and-export across SaaS and cloud tooling. Prioritise these combinations over raw entitlement counts because they create the fastest route to misuse and fraud.
• Apply the same offboarding discipline to third parties Track contractor and vendor access through the same lifecycle process used for employees, including expiry, recertification, and revocation triggers. Third-party accounts should never remain active simply because the relationship is operationally convenient.
• Use continuous access reviews for high-risk accounts Focus review cycles on accounts with production, financial, or administrative reach, and tie review findings to immediate remediation rather than long remediation queues. This is most effective when supported by clear ownership and entitlement inventory accuracy.

Key takeaways

• Insider threat risk often starts with permissions that persist after business need has changed.
• Privilege creep and toxic permission combinations create the blast radius that turns routine access into material exposure.
• Access review, lifecycle governance, and SoD enforcement are the controls that separate manageable internal risk from repeated incidents.

Key terms

• Privilege Creep: Privilege creep is the gradual accumulation of access rights over time as users change roles, inherit temporary access, or keep permissions they no longer need. It creates hidden risk because the identity looks normal while its effective reach quietly expands beyond business purpose.
• Toxic Permissions: Toxic permissions are combinations of otherwise valid entitlements that become dangerous when held together by one identity. They can enable fraud, unauthorized changes, or data exposure because the security failure lies in the interaction between privileges, not just the presence of a single high-risk permission.
• Least Privilege: Least privilege is the practice of limiting an identity to the minimum access required for its current task or role. In identity governance, it only works when permissions are continuously reassessed after role changes, projects end, or vendor relationships expire.
• Joiner-Mover-Leaver: Joiner-mover-leaver is the lifecycle process that grants, changes, and removes access as people or external identities enter, change, or exit a role. It is a core governance control because stale access is often created by failed handoffs at move and leave events.

Deepen your knowledge

NHI governance, agentic AI identity, and machine identity lifecycle are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are responsible for identity security strategy or NHI governance in your organisation, it is worth exploring.

This post draws on content published by SecurEnds: Insider Threats Caused by Excess Access. Read the original.