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+# Security Policy
+
+## Reporting a Vulnerability
+
+Please report any **critical** or **important** security vulnerability, suspected or confirmed, through private disclosure channels:
+
+### Preferred: GitHub Security Advisories
+
+1. Go to the repository's **Security tab**
+2. Click **"Report a vulnerability"**
+3. Submit the advisory
+
+This creates a private report visible only to maintainers.
+
+### Alternative: Email
+
+If GitHub advisories are not suitable, please contact this subgroup of GridFM maintainers:
+
+- [Romeo Kienzler](mailto:Romeo.Kienzler1@ibm.com)
+- [Alban Puech](mailto:Alban.Puech2@ibm.com)
+- [Tamara Govindasamy](mailto:tamara.govindasamy@ibm.com)
+- [François Mirallès](mailto:miralles.francois@hydroquebec.com)
+- [Thomas Tolhurst](mailto:tolhurst.thomas@hydroquebec.com)
+
+---
+
+In your report, include:
+- Who you are (name and company)
+- Description of the issue
+- Affected versions
+- Detailed steps to reproduce
+- Potential impact
+- Suggested remediation (optional)
+
+For **moderate** or **low-severity** security vulnerabilities, you can use public GitHub issues.
+
+To help you assess the severity of the potential vulnerability, you can use the [Apache severity rating](https://security.apache.org/blog/severityrating/).
+
+If you are not sure whether the issue should be reported privately or publicly, please make a private report.
+
+---
+
+## Supported Versions
+
+We currently provide security updates for the following versions:
+
+| Version        | Supported |
+|----------------|-----------|
+| Latest release | ✅        |
+| Previous major | ❌        |
+| Older versions | ❌        |
+
+Users are strongly encouraged to upgrade to the latest release to receive security fixes.
+
+---
+
+## Response Timeline
+
+We aim to follow these response targets:
+
+- **Initial acknowledgment**: within 72 hours  
+- **Status update**: within 7 days  
+- **Resolution target**: within 90 days (depending on severity)
+
+These are targets, not guarantees.
+
+### Severity Guidelines
+
+| Severity | Response Target | Patch Target |
+|----------|----------------|--------------|
+| Critical | 24–48 hours    | ≤ 7 days     |
+| High     | ≤ 72 hours     | ≤ 14 days    |
+| Medium   | ≤ 7 days       | ≤ 30 days    |
+| Low      | ≤ 14 days      | ≤ 90 days    |
+
+---
+
+## Disclosure Policy
+
+We follow a **coordinated vulnerability disclosure (CVD)** process:
+
+- We work with reporters to agree on a disclosure timeline  
+- Public disclosure occurs after a fix is available or mitigation exists  
+- Contributors are credited unless anonymity is requested  
+- CVE identifiers will be requested when appropriate  
+
+---
+
+## Security Practices
+
+We strive to follow secure software development practices aligned with OpenSSF recommendations:
+
+- Dependency scanning and updates (e.g., Dependabot/Renovate)
+- Static analysis (e.g., CodeQL or equivalent)
+- Reproducible builds where possible
+- Code review before merging
+- Use of CI pipelines for validation
+
+---
+
+## Supply Chain Security
+
+Where applicable, we aim to:
+
+- Provide versioned releases with changelogs
+- Track dependencies and vulnerabilities
+- Improve build provenance over time (e.g., SLSA alignment)
+
+---
+
+## Reporting Abuse or Misuse
+
+If you believe the software is being used in a way that creates security risks or violates acceptable practices, please report it via the same channels above.
+
+---
+
+## Acknowledgements
+
+We thank security researchers and contributors who help improve the safety and reliability of the GridFM ecosystem.