What is just-in-time access?

JIT access helps reduce standing privileges and enforce the principle of least privilege (PoLP), which holds that users should have only the permissions they need to do their jobs and no more.

Most people think of PoLP as a matter of scope: the breadth of what a user can access, including any sensitive data. But scope is only half of it. The other important element of least privilege is time: how long a user gets to hold their permissions.

Many users have continuous access to systems or sensitive information, a phenomenon known as standing privilege. The trouble with standing privileges is that, when they aren’t in use, they sit idle—not active but still available. An administrator who needs to use a particular database only a few times a month, for example, can still technically reconfigure that database at any hour of any day. This perpetual access makes standing privileges an attractive target for threat actors, who increasingly focus on the identity attack surface.

Just-in-time access helps eliminate the security risks associated with standing privileges by replacing perpetual permissions with temporary, on-demand access that expires automatically when a task is done. No identity carries elevated permissions except during the brief window when those permissions are actively used.

Just-in-time access is a core capability of privileged access management (PAM), the practice of securing and governing highly privileged access to critical systems. It also serves as a concrete enforcement mechanism for zero trust, the security model that treats every access request—regardless of source—as something to be verified.

JIT access matters because standing privileges are among the most consequential security risks in modern IT environments. By eliminating perpetual permissions, JIT access significantly reduces the amount of damage that both insider threats and external hackers can do by abusing valid accounts.

According to the IBM X-Force Threat Intelligence Index, 32% of the incidents X-Force responded to last year involved the abuse of valid accounts. In these identity-based attacks, malicious actors steal the credentials of human users or nonhuman identities (NHIs). Attackers then use the credentials to get inside the network, leveraging the accounts’ existing permissions to access sensitive data and resources.

Because attackers are using valid accounts, they often go undetected for months. The IBM Cost of a Data Breach Report found that breaches involving stolen or compromised credentials cost an average of USD 4.67 million and take roughly 246 days to contain. Attackers have nearly eight months of unauthorized access to operate unnoticed.

The danger is heightened when hackers get their hands on accounts with elevated access. Consider a DevOps engineer pushing code to production or an incident response analyst working with sensitive log stores. In a standing-access model, these users have powerful permissions that are always on. A threat actor who steals their credentials will have those same permissions.

Perpetually elevated privileges also make it easier for attackers to move from system to system through a process called lateral movement. Lateral movement can significantly expand the blast radius of a breach.

However, attackers can also exploit less privileged accounts through a process called privilege escalation, which involves acquiring higher permissions than the compromised account started with. For instance, a threat actor might use a stolen standard account to gain administrator rights, unlocking systems and sensitive data the original account could never reach.

Just-in-time access helps mitigate the risks of any account theft or abuse by limiting what an attacker can do with a stolen credential. Most of the time, that credential maps to a standard, low-value account. The account can receive elevated permissions only by passing additional verification steps—steps that the attacker is unlikely to complete.

Most just-in-time access systems follow the same sequence. A user issues an access request, the user passes additional verification measures, a decision is made, access is temporarily granted and permissions are automatically revoked at the end of the session.

A JIT access platform, typically part of a broader PAM or identity and access management (IAM) solution, generally orchestrates each step.

A user, workload, service, AI agent or other identity requests access to a specific resource, usually with a justification for the access and a defined time frame.

If the requester is a human—a DevOps engineer, a vendor on remote access, an incident-response analyst—they might manually provide this data, or predefined access policies might provide it for them. If the requester is a nonhuman identity such as a service account in the CI/CD pipeline, a policy defines the justification and time frame in advance. The request itself is an automated call.

The system verifies the requester’s identity through an enhanced authentication challenge. For a human, that typically means multifactor authentication (MFA) combined with contextual and behavioral signals such as device, location and time of request.

For an NHI, it usually means providing cryptographic credentials, such as signed tokens or certificates. Both approaches reduce the risk that a stolen password alone can unlock privileged access—through a second factor for humans and a cryptographic key for machines.

An access decision is made based on the user’s identity, relevant access policies and contextual factors. Requests can run through one of two approval workflows: 

• Manual approvals, which route the request to a human administrator.
  
  
• Automated approvals, which grant access based on predefined policies.

Routing depends in part on whether the requester is human or nonhuman. A person requesting sensitive access can often wait for human approval. A service account requesting access thousands of times a day cannot, so the system approves those requests automatically according to policy.

Many JIT systems combine both workflows through risk-tiered routing. Routine requests are automatically approved, while sensitive ones require a human in the loop.

Emergency “break-glass” requests are the exception. When a production system fails overnight and the work can’t wait for an approver, a break-glass path—akin to breaking the glass on a fire alarm—grants immediate elevated access. To keep it from becoming a permanent back door, that access is heavily logged, tightly time-boxed and alerted on in real time.

If an access request is approved, the platform provisions temporary access for the requested amount of time. The expiration is built in from the start, rather than persisting until someone remembers to remove it.

When the task finishes or the window expires, the system strips privileges automatically. It revokes the rights, rotates the underlying credentials or destroys the temporary account entirely. Much of the security value of just-in-time access lives here. There is no lingering access for an attacker to exploit later.

JIT platforms monitor privileged sessions, logging every action a user takes with their elevated permissions. These logs typically feed a security information and event management (SIEM) system, producing an immutable audit trail of the session. Each session is fully reviewable after the fact: who or what did what, on which system, for how long.

Most JIT systems use one of three access models, often in combination. These models determine what the JIT system provisions, when it approves a request and how it removes access when the window closes.

Broker-and-remove access models grant access by using vaulted accounts. Vaulted accounts are effectively shared privileged accounts with passwords locked in a secure store, or vault. When someone needs the account, they request it from the vault and must pass an authentication challenge to prove they are allowed to access the account. When the user gets the account, they can use it only for a set window of time. The vault typically changes the password the moment that the session is over, so it can’t be reused. This last step is what makes the broker-and-remove model secure.

This approach is generally used for shared administrator accounts and other privileged sessions where several people need the same account, but no one should hold its password permanently.

Ephemeral accounts are created on demand for a specific task and destroyed the moment the task is done. Because the account doesn’t exist before the request or after the window closes, there’s no dormant account for an attacker to find and no lingering group membership to track. Each account also leaves a clean record of exactly what it did.

Ephemeral accounts are the strongest fit for high-risk systems, strict audit requirements and remote or third-party sessions where an outside operator should have no lasting presence. They’re also increasingly applied to service accounts and other nonhuman identities, which operate at a scale and speed where permanent credentials can become both impractical and risky. 

Temporary elevation, sometimes called just enough access, keeps a standard account’s normal permissions most of the time and switches on specific elevated privileges by request for a time-limited window.

Temporary elevation is usually delivered through privilege elevation and delegation management (PEDM), a PAM function that grants narrow privilege bumps to existing accounts rather than handing out separate administrator credentials. This precision suits endpoint and administrative tasks, including DevOps work and incident-response investigations, where someone needs a brief, specific boost rather than full admin rights.

Just-in-time access doesn’t operate in isolation. It sits within a stack of related and often interdependent identity security tools and practices.

Just-in-time access is a core capability of privileged access management (PAM), which secures and governs elevated access to critical systems. Just-in-time access is one of the ways that PAM tools control access and prevent privilege abuse.

PAM platforms use JIT access to replace perpetual administrator rights with on-demand access that exists only for the duration of a task.

JIT also helps streamline how privileged users obtain access. Routine requests can clear automatically instead of going through a manual approval process.

Zero trust is a security model that treats every access request as a potential threat, requiring each one to be verified rather than assumed safe. Just-in-time access helps enforce zero trust by removing standing privileges and implicit trust. Every access request is verified as it comes in. None are granted automatically.

Just enough access (JEA) is the practice of granting an identity the minimum permissions that a task requires, and nothing else. It’s easily confused with just-in-time access, yet these models deal with different but related aspects of access control. JEA governs the level of access an identity gets, whereas JIT governs when an identity gets that access.

The two models work best together. In practice, most JIT implementations also apply JEA, tightening the scope of each grant on top of limiting its duration.

Zero standing privileges (ZSP) is a security model in which no identity holds elevated access by default. Every privilege must be granted fresh, then removed when the task is done. In a sense, ZSP is the end state of just-in-time access. The difference between the two is more a matter of degree.

ZSP originated with Gartner, which argued that privileges should exist only while they’re actively in use. JIT helps implement this state by making access more dynamic.

Nonhuman identities—the digital identities attached to service accounts, workload identities, bots and AI agents—outnumber humans in the enterprise, and most carry more standing privilege than they need. Just-in-time access addresses the risks of NHI misuse and abuse by replacing long-lived credentials with short-lived ones scoped to a single task. Access exists only when it’s needed and disappears the moment it’s not.

Every NHI is a potential vulnerability if its permissions aren’t carefully limited—and they rarely are. Organizations frequently over-grant NHIs, handing them more permissions than they need to keep automated processes from breaking. According to OWASP, this kind of overprivileging is one of the top 10 risks for nonhuman identities.

NHIs also tend to run with fewer security controls and less monitoring than human accounts, which makes them juicy targets for hackers.

As Nick Bradley, a threat intelligence manager at IBM X-Force, put it on an episode of the IBM Security Intelligence podcast, an attacker who compromises a service account is “stealing something that no one was even watching in the first place.”

“If I steal your password and log in to your account, it’s only a matter of time before you figure out that somebody has gotten a hold of your credentials. But if I get a hold of a service account, are you ever going to find out if you’re not watching it or auditing its activity?”

AI agents add another wrinkle. They’re often spun up quickly with broad permissions. And they can take on new tasks and even hand access to other agents faster than anyone can keep track of what they’re allowed to do.

Just-in-time access helps keep NHIs and AI agents secure while keeping pace with their speed and volume. It swaps long-lived credentials for short-lived ones tied to a single task. A secure vault hands out a token when the task starts. It works only for that task, expires when the task ends and is replaced rather than reused. If it leaks, it’s useful only for the moments it stays valid, and only for the task it covered.

Access solutions such as IBM Verify Privileged Identity and HashiCorp Vault issue and manage these short-lived credentials for machine identities.