Introducing SLO Guardrails: Automated Enforcement for Security Remediation Timelines

Security teams spend significant time defining remediation SLAs and service level objectives (SLOs) for vulnerabilities. The challenge isn't creating the policy—it's enforcing it consistently across hundreds of repositories and engineering teams.

As organizations scale, security findings accumulate, priorities shift, and manual tracking becomes increasingly difficult. Critical vulnerabilities remain open longer than intended, security debt grows, and security teams often lack an effective mechanism to ensure remediation commitments are actually met.

Today, we're excited to introduce SLO Guardrails, a new capability in Heeler that automates security remediation policy enforcement directly within the software development lifecycle.

Moving Beyond Dashboards and Reports

Most organizations already define remediation expectations based on severity.

Common examples include:

• Critical vulnerabilities must be remediated immediately upon SLO expiration.
• High severity vulnerabilities must be remediated within a specified number of days.
• Medium severity findings must be addressed within an established remediation window.

While these policies are well understood, enforcement often depends on manual reporting, spreadsheets, periodic reviews, or security teams chasing engineering teams for updates.

The result is inconsistent enforcement and growing security debt.

SLO Guardrails changes that.

Enforcing Security SLOs During Development

SLO Guardrails continuously evaluate the security posture of a repository during pull request activity.

When a pull request is opened or updated, Heeler evaluates whether any existing vulnerabilities have exceeded their configured remediation timelines. If violations are detected, Heeler can automatically take action based on organizational policy.

Available actions include:

• Observe – Record and monitor violations
• Warn – Notify developers and reviewers
• Block – Prevent merges until violations are resolved

This allows organizations to transform remediation policies from passive guidance into active controls.

Evaluating the Full Security State

Unlike traditional policy checks that focus exclusively on newly introduced issues, SLO Guardrails evaluate the entire security state of a repository.

This distinction is important.

A pull request may not introduce a new vulnerability, but it may still be attempting to advance software that contains long-overdue critical findings.

SLO Guardrails identifies these situations and applies policy enforcement based on configured severity thresholds.

Organizations can define custom thresholds for:

• Critical
• High
• Medium
• Low

For example:

SeverityDays Overdue ThresholdCritical0High7Medium30

With this configuration:

• Critical findings trigger immediately upon SLO expiration
• High severity findings trigger after seven overdue days
• Medium findings trigger after thirty overdue days

Flexible Policy Scoping

Organizations rarely operate with a single security policy.

Different applications, environments, and teams often have unique requirements.

SLO Guardrails can be scoped to:

• Global environments
• Individual repositories
• Branches
• Service runtime contexts

This flexibility enables organizations to align remediation policies with risk, business requirements, and operational realities.

Reducing Security Debt Before It Accumulates

One of the most common challenges security leaders face is preventing security debt from quietly accumulating over time.

Vulnerabilities that remain unresolved for months often become accepted risk by default—not because teams intentionally accepted them, but because there was no effective enforcement mechanism.

SLO Guardrails helps organizations:

• Enforce remediation SLAs consistently
• Improve accountability across engineering teams
• Reduce operational overhead
• Prevent overdue vulnerabilities from progressing through the software lifecycle
• Strengthen secure-by-design development practices

Security Policies That Enforce Themselves

Modern application security programs need more than visibility. They need automated enforcement mechanisms that integrate directly into developer workflows.

SLO Guardrails brings remediation accountability directly into pull request workflows, ensuring security policies are continuously evaluated and enforced as software evolves.

The result is a more proactive security program, reduced security debt, and stronger alignment between security requirements and software delivery.

Available Now

SLO Guardrails is available now in Heeler.

To learn more or see SLO Guardrails in action, contact the Heeler team.

‍