T05 · Unauthorized Access and Privilege Escalation
- Location
SKILL.md:150- Finding
Autonomous Preloading of Sensitive Personal Context Violates Least Privilege
- Content
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Vulnerability Details
File Location:
SKILL.md:150-168
Vulnerability Type:T05: Unauthorized Access and Privilege Escalation
Risk Level: MediumComplete Vulnerable Instruction Snippet:
markdown ### Technique 5: Predictive Context Preloading (Anticipatory Caching) Instead of: Reactive loading after each user query Use: Predictive loading based on conversation patterns and time/context cues **Implementation:** - During lulls in conversation (or during heartbeat cycles), predict likely next queries - Preload relevant memory snippets or document summaries - Store in session context for instant access **Prediction Signals:** - Time of day (regular meeting times) - Recent topics (if discussing X, likely to discuss Y next) - External triggers (calendar events, time-based patterns) - User behavior patterns (learned over time) **Example**: If user always asks about project status at 10 AM, preload project-related memory snippets at 9:45 AM. **Efficiency Gain**: Converts high-cost reactive operations to near-zero-cost proactive operations.Technical Analysis
The Skill instructs the Agent to access memory snippets or document summaries proactively during idle periods or heartbeat cycles. Access is initiated from behavioral predictions, time signals, and previous conversation patterns rather than a current user request.
Although the Skill does not grant itself new operating-system permissions, it directs the Agent to use already-authorized memory and document tools beyond the immediate task boundary. This violates least-privilege and purpose-limitation principles: token optimization does not require speculative access to personal memories or documents before the user asks for that information.
Storing proactively retrieved information in session context increases its exposure. Sensitive project information, calendar-derived context, personal behavior patterns, or document contents co ...[truncated 1938 chars]
- Remediation
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Remediation Suggestions
- Remove predictive preloading during idle periods and heartbeat cycles.
- Require an active, user-initiated request before searching memories, calendars, or connected documents.
- Require explicit confirmation before accessing especially sensitive sources or performing retrieval unrelated to the current request.
- Enforce task-scoped retrieval controls so queries are restricted to sources, time ranges, fields, and documents necessary for the active task.
- Keep retrieved information ephemeral and remove it from session context once the task is complete.
- Do not derive speculative access decisions from learned user behavior without explicit opt-in and a documented retention policy.
- Add audit logging for background memory and document access, including the triggering request, data source, purpose, and retention period.
- If caching is retained, cache only non-sensitive metadata or user-approved summaries, isolate caches by task, apply short expiration periods, and prohibit reuse in unrelated conversations.
- Treat all retrieved document content as untrusted data and prevent embedded instructions from controlling tools or requesting disclosure of other context.