Documents  Risks FTA-005: Report Served From Stale Cache

FTA-005: Report Served From Stale Cache

1 Status

Date Status
06-07-2026 Identified
07-07-2026 Analysed

2 Top Event

Misleading report delivered to the user (TOP-2)

3 Minimal Cut Set

{E8} — report served from stale cache; a first-order cut set, one basic event suffices

4 Description

The report engine serves cached figures that no longer match the underlying records, so the user acts on numbers that were true yesterday. Analysis is complete; the mitigation has not been designed yet, so the residual scores are still blank.

5 Severity

5

6 Likelihood

4

7 Mitigation

Proposed: invalidate cached report data when the underlying records change and stamp every report with the time of its data snapshot.

8 Affected Documents

# Proposed Text Req-ID
1 The software shall invalidate cached report data when the underlying records change and shall stamp every report with the time of its data snapshot. REQ-024

9 Monitoring

To be defined together with the mitigation.