ISO/IEC 27001:2022 · Technological control
ISO 27001 Annex A 8.4: Access to source code
Quick answer
ISO 27001 Annex A 8.4 (Access to source code) is a technological control. Control read and write access to source code, development tools and software libraries.
What auditors look for
Auditors check that 8.4 is either justified as not applicable in your Statement of Applicability or implemented and working. Typical evidence includes:
- Repository access lists
- Branch protection rules
- Access reviews for code repositories
How to implement 8.4 in practice
- Protect main branches and require reviews
- Limit write access
- Scan repositories for secrets
- Name an owner for 8.4, decide how often it runs and file evidence each time, so the control is audit-ready all year.
Recording 8.4 in the Statement of Applicability
List 8.4 with whether it applies, the reason (usually the risks it treats or a legal or contractual requirement), its implementation status and where the evidence lives. If you exclude it, explain why none of your risks or obligations require it.