Snowflake password-only authentication sunset raises service identity risk

At a glance

What this is: Akeyless reports that Snowflake is ending password-only authentication for humans and services by November 2025, which will force many enterprises to change how programmatic access is handled.

Why it matters: IAM, PAM, and NHI teams need to treat this as a service identity migration issue, because hardcoded passwords in pipelines and legacy integrations create brittle access paths that no longer fit the new model.

👉 Read Akeyless's analysis of Snowflake's password-only authentication changes

Context

Snowflake is phasing out password-only authentication, which means access controls that once worked for both people and automation will no longer be acceptable. In practice, this is a governance problem as much as an authentication change, because many enterprises still mix human access, service accounts, and legacy pipelines under the same credential patterns.

The main identity issue is the continued use of passwords for non-human access. Once a platform removes that option, teams have to separate human sign-in flows from service-to-service authentication and decide which workloads should move to key-pair authentication, OAuth, or other passwordless methods.

For organisations with layered environments, the hardest part is not the policy change itself but the dependency map behind it. Any integration built around hardcoded credentials or shared service accounts will need a controlled migration path, and that is typical of large enterprise estates rather than an edge case.

Key questions

Q: What should teams do when a platform disables password-only access for service accounts?

A: Treat it as a service identity migration, not a simple authentication change. Inventory every automated dependency, assign ownership, and move programmatic access to key-based or federated methods that support lifecycle control, revocation, and auditing. The goal is to remove hidden password dependencies before they become broken pipelines.

Q: Why do passwords create more risk for non-human identities than for human users?

A: Passwords are harder to govern when the identity is a service because they are often reused, stored in code, and shared across teams. That makes ownership unclear and expands the blast radius when a secret leaks. Non-human identities need controls that fit machine-to-machine usage, not human login patterns.

Q: What breaks when critical access still depends on passwords in a Zero Trust model?

A: Passwords preserve a reusable secret that attackers can phish, brute-force, or replay, which undermines continuous verification. In critical infrastructure, that weakness is amplified because one compromised identity can reach remote admin paths, operational systems, or mobile workflows that were assumed to be trusted.

Q: How should security teams choose between passwordless and MFA for workforce login?

A: They should not choose between them as if they were the same thing. Passwordless removes the reusable password, while MFA requires two or more factors. The best enterprise outcome is phishing-resistant passwordless MFA, usually with FIDO2 or WebAuthn passkeys, because it improves assurance without relying on a shared secret.

Technical breakdown

Why password-only authentication fails for service identities

Password-only authentication is a poor fit for service identities because the secret is usually reused, stored in configuration, and difficult to govern across environments. In NHI terms, the problem is not just the credential itself but the way it persists beyond the task it was meant to enable. That creates standing access, unclear ownership, and a broad blast radius when the password leaks or is embedded in a pipeline. Snowflake’s move forces organisations to treat service identity authentication as a lifecycle problem rather than a one-time setup decision.

Practical implication: inventory every service account that still depends on passwords and classify which ones can move to passwordless or key-based flows.

How MFA changes human access without solving machine access

MFA strengthens human authentication because it adds a second factor to a person-led sign-in flow, but it does not solve the separate problem of machine access. Service accounts cannot meaningfully use the same interactive controls, so enterprises need different patterns for human users and automation. This is why authentication policy often breaks when teams assume one control model can cover both. The operational question is not whether MFA is useful, but whether the identity type can actually use it without creating workarounds that reintroduce risk elsewhere.

Practical implication: separate human sign-in controls from service authentication standards so teams do not force automation into human-centric MFA flows.

Why key-pair and OAuth become the practical migration paths

Key-pair authentication and OAuth reduce dependence on reusable passwords by shifting trust to managed credentials or federated tokens. That does not remove governance requirements, because lifecycle control, rotation, issuance scope, and offboarding still matter. The architectural change is that access becomes more explicit and easier to constrain than a shared password hidden in code or a pipeline variable. For organisations running Snowflake at scale, the technical challenge is less about the protocol choice and more about rebuilding the surrounding control plane for issuance, monitoring, and revocation.

Practical implication: standardise approved machine-authentication methods and tie each one to an owner, rotation rule, and revocation process.

NHI Mgmt Group analysis

Passwords are no longer a viable control boundary for service identities in modern data platforms. Snowflake’s policy change exposes the fact that shared and hardcoded passwords were already weak governance, not just weak authentication. Once a platform removes password-only access, the organisation is left with the underlying control failure: machine access had been anchored to a credential type that could not be lifecycle-governed cleanly. The implication is that service identity design has to be treated as a first-class control plane problem, not an implementation detail.

Human authentication and machine authentication are diverging control problems. The same organisation may need MFA, SSO, and passwordless sign-in for people, while using key-pair or token-based flows for services. Treating those as variations of one policy creates false consistency and operational exceptions that undermine governance. The practical lesson is that identity programmes must separate user access patterns from non-human access patterns before policy decisions are forced by a platform vendor.

Credential sprawl is the real risk behind migration pressure. Enterprises that have mixed service passwords into CI/CD, ETL, and third-party integrations have created hidden dependencies that only surface when a platform disables them. This is a classic NHI governance gap because ownership, rotation, and offboarding are often unclear for machine credentials. Teams should see the migration as an inventory and accountability exercise, not just an authentication upgrade.

Zero Trust only becomes meaningful when machine identities are governed with the same discipline as human identities. The article’s core signal is not that passwordless is fashionable, but that trust assumptions embedded in legacy service access no longer match enterprise risk. 90% of IT leaders say properly managing NHIs is essential for a successful zero-trust implementation, which is why this change matters beyond Snowflake itself. Practitioners should use the policy shift to reset their identity architecture around explicit, monitored, and revocable trust.

From our research library:

• 90% of IT leaders say properly managing NHIs is essential for a successful zero-trust implementation, according to the Ultimate Guide to NHIs.
• Read next: Zero Trust Identity Guide

What this signals

Credential-driven service access is becoming a governance exception that enterprises can no longer justify. As platforms remove password-only options, the remaining work is to locate where automation still depends on secrets that were never designed for lifecycle control. Teams should expect authentication policy changes to surface hidden NHI debt in pipelines, third-party integrations, and legacy scripts.

Zero Trust for machine identities is now an authentication architecture issue, not a strategy statement. The organisations that adapt fastest will be the ones that can separate human access, service access, and offboarding logic into distinct control paths. That is the practical meaning of passwordless migration in large estates.

For practitioners

• Inventory every password-based service account Identify all Snowflake service users, ETL jobs, scripts, and third-party integrations that still rely on passwords, then map each one to an owner and business function.
• Separate human and service authentication paths Apply MFA and SSO only where the identity subject is a person, and move automation to key-pair or OAuth-based authentication instead of forcing interactive controls.
• Standardise approved machine-authentication methods Choose a small set of sanctioned patterns for programmatic access, then define issuance, rotation, and revocation rules for each method across environments.
• Rebuild pipeline secrets handling around runtime injection Remove hardcoded credentials from code and config files, and inject secrets only at execution time so service access can be monitored and revoked consistently.

Key takeaways

• Password-only service access is being pushed out of the acceptable control set, which exposes how many enterprise workflows still depend on reusable secrets.
• The policy change affects both human and non-human identities, but the hardest remediation work sits in automated pipelines, ETL jobs, and third-party integrations.
• The decisive control shift is from reusable passwords to governed machine-authentication methods with clear ownership, revocation, and auditability.

Key terms

• Service Identity: A service identity is a non-human identity used by applications, workloads, or automation to authenticate and access resources. It may be a role, token, key, or certificate, and it needs the same lifecycle discipline as any privileged identity because it can directly expose data.
• Passwordless Authentication: An authentication approach that removes passwords and uses a device-bound cryptographic key plus local user verification. It reduces phishing and replay risk, but it only improves assurance when enrollment, recovery, and revocation are tightly governed.
• Runtime Secret Injection: A pattern that retrieves credentials only when a process starts, rather than storing them in files or source control. For AI developer tools, it reduces secret persistence, limits accidental disclosure, and keeps the credential tied to a specific execution session.
• Authentication lifecycle: The authentication lifecycle is the full sequence of controls that decide whether an identity is trusted, from sign-up and verification through sign-in, session handling, and recovery. It matters because attackers do not need to beat every control if one stage leaks trust or creates a reusable session.

What's in the full article

Akeyless's full post covers the operational detail this post intentionally leaves for the source:

• Step-by-step guidance for moving Snowflake service accounts from passwords to key-pair or OAuth authentication
• Implementation detail on runtime secret injection for scripts, ETL jobs, and CI/CD workflows
• Operational guidance on centralising access policy across multiple environments and teams
• Logging and monitoring considerations for proving the migration is auditable

👉 The full Akeyless post covers the Snowflake authentication timeline, supported login methods, and migration guidance.

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.