Acacian/aegis

v0.9.1 Security

This release includes 2 security fixes for security teams reviewing exposed deployments.

Published 2mo MCP Security & Auth

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✓ No known CVEs patched

Read the diff → Tool health → What is this tool? →

This release patches 2 known CVEs

Topics

agent-security ai-agent-security ai-agents ai-governance ai-safety ai-security

+14 more

audit-trail compliance guardrails langchain llm-security mcp mcp-security model-context-protocol pii-detection policy-as-code policy-engine policy-testing prompt-injection selection-governance

Affected surfaces

auth rbac

Summary

AI summary

Fixed privilege escalation and resource consumption gaming vulnerabilities.

Full changelog

Quality hardening for Selection Governance

Fixed

Token-boundary keyword matching — prevents false positives (e.g. "undelete" ≠ "delete")
CongruenceChecker priority — deterministic DELETE > WRITE > READ
Privilege escalation gaming — no longer blindly concatenates param values
Resource consumption gaming — max(count, limit, batch_size)
PII keyword list — synced with design doc (added email, name)

Added

SelectionAuditor thread safety (threading.Lock)
CommitRevealSelection TTL + max_pending (memory leak prevention)
@audit_selection sync function support
33 new tests

Changed

GitHub Action renamed: "Aegis AI Agent Security Gate"

See CHANGELOG.md for full details.

Security Fixes

Prevented privilege escalation by disallowing blind concatenation of parameter values
Limited resource consumption with `max(count, limit, batch_size)` logic

View diff on GitHub

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About Acacian/aegis

Policy-based governance for AI agent tool calls. YAML policies, approval gates, risk assessment, and audit logging. Cross-platform: LangChain, OpenAI, Anthropic, MCP.

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