Should organisations rely on password vaults for non-SAML apps?

What password vaults do well, and what they do not change

Vaults are strongest at reducing password exposure, standardising storage, and making rotation or sharing easier to govern. They do not change the fact that a user still has to authenticate somewhere, and that handoff point can still be intercepted if the login flow is weak, reused across sites, or exposed to browser-based capture.

For non-SAML apps, the key distinction is between protecting the secret at rest and protecting the login event in motion. A vault can keep the password out of spreadsheets and chat tools, but it does not by itself stop static secret use from being phished, replayed, or harvested by malware once the user enters it.

That is why vaulting is a control, not a complete sign-in strategy. If the app still depends on a human typing or pasting credentials into a browser, the vault reduces exposure of the stored secret but leaves the authentication ceremony and session creation path largely unchanged.

Why the login path matters more than the vault for attacker resistance

Attackers usually target the browser, the endpoint, or the user interaction step, because that is where a vaulted password must still be revealed to succeed. AiTM phishing, infostealers, and session theft all work around the storage problem by capturing the credential after it leaves the vault or by stealing the resulting session.

For that reason, a vault is materially weaker when it is used as the only compensating control for legacy apps. The control may still be valuable for hygiene and operational discipline, but the exposure remains if the app accepts bearer-style passwords without phishing-resistant authentication or stronger session governance. Workforce Identity Security Guide and Identity Provider and SSO Security Guide both frame this problem as a session and sign-in risk, not only a password storage issue.

Where non-SAML apps are involved, the more important question is whether the organisation can remove or narrow the human password path at all. If the answer is no, then vaulting should be treated as a partial control that needs endpoint hardening, phishing resistance where possible, and tighter session controls around the application.

When vaulting is useful, and when it becomes a false sense of security

Vaults are useful when they support disciplined credential handling for a limited set of legacy apps, privileged accounts, or shared access cases that cannot yet be replaced. They also help when the main problem is uncontrolled secret sprawl, ad hoc sharing, or weak rotation practices. In those cases, a vault creates a cleaner operational model even if it does not eliminate the underlying authentication weakness.

The false sense of security appears when teams assume that “password is in the vault” means “password risk is solved.” For non-SAML apps, that assumption is wrong if the user still knows the password, can paste it into a browser, or can be tricked into entering it on a lookalike site. Guide to the Secret Sprawl Challenge is relevant here because the operational problem is often not only theft, but uncontrolled distribution and repeated exposure of the same secret.

In practice, organisations should treat vaulting as one layer in a broader access model. The long-term objective is to reduce the number of places where a reusable password can be typed, cached, or intercepted, and to ensure that any remaining passworded access has compensating controls around session creation, device trust, and privilege.

Risk and Threat Considerations

Vaults reduce exposure of stored secrets, but they do not eliminate the attack surface created by password-based login flows. If the same credentials still unlock high-value apps, attackers can target the human sign-in step through AiTM phishing, infostealers, password reuse, or session theft.

Failure mechanism: The secret remains usable in the browser or endpoint, so compromise occurs when the user reveals it, the device captures it, or the session token is stolen after authentication.

Impact: A single vaulted password can still lead to account takeover, lateral movement, or persistent access to legacy applications, especially where MFA is weak or sessions are long lived.

Practitioner Guidance

What to prioritise: Classify every non-SAML app by whether vaulting is merely storing a secret or actually changing the user’s exposure path. If the answer still depends on a reusable password entered by a human, treat the app as a residual phishing and infostealer risk, not as a solved access problem.

What to verify: Check whether the vault integrates with rotation, checkout approval, session recording, or just-in-time release, and whether users can bypass it by copying credentials into the browser. Where possible, pair vaulting with controls that reduce direct human handling of the password, not just its storage.

Decision rule: If the app is business critical or privileged and still password based, use the vault only as a transitional control while you plan a stronger sign-in path or tighter session governance. If the app is low criticality and low sensitivity, vaulting may be acceptable as a hygiene control, but it should still be monitored for reuse and exposure.

Practitioner takeaway: Vaults improve custody of passwords, but they do not neutralise the risk created when humans still authenticate with reusable secrets in a browser. The practical test is whether the control changes the login event itself; if it does not, it is support infrastructure, not the primary defence.

Related resources from NHI Mgmt Group

• What breaks when organisations rely on password vaults for every privileged identity?
• How should security teams govern non-human identities at scale?
• How should security teams govern non-human identities for compliance?
• Why do non-human identities create more audit risk than human accounts?