[security-observability] Daily Security Observability Report — 2026-06-01

[github-actions[bot]]

Executive Summary

Over the past 7 days (analysis window: June 1, 2026), 50 firewall-enabled agentic workflow runs were analyzed across the github/gh-aw repository. A total of 3,211 network requests were monitored: 2,665 allowed (83%) and 546 blocked (17%). The dominant blocked traffic category is (unknown) — requests with no resolvable domain name, likely localhost or internal routing attempts — accounting for 544 of 546 blocked requests. Only two named external domains were blocked (1 request each: github.com:443 and api.github.com:443), suggesting the firewall policy is well-tuned for external access but that many workflows are generating unresolvable connection attempts.

No DIFC integrity-filtered events were detected in the last 7 days, indicating clean data-flow integrity across all agentic workflow executions. This is a positive security signal showing that the DIFC system found no unauthorized tool calls or data exfiltration attempts.

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🔥 Firewall Analysis

Key Firewall Metrics

Metric	Value
Workflows analyzed (firewall-enabled)	50
Total network requests monitored	3,211
✅ Allowed requests	2,665
🚫 Blocked requests	546
Block rate	17%
Total unique blocked domains	3

📈 Firewall Request Trends

All 50 firewall-enabled runs occurred on June 1, 2026. The block rate of 17% is consistent across workflows and largely attributable to (unknown) domain requests — likely internal connection attempts (e.g., localhost, loopback, or container-internal routing) that are blocked by default. The two named domain blocks (github.com:443, api.github.com:443) are isolated incidents and not a pattern of concern.

Top Blocked Domains

The overwhelming majority of blocked requests (544/546) are classified as (unknown) — requests with no identifiable destination domain. This is expected behavior for container-internal or localhost connections. The single blocked requests to github.com:443 and api.github.com:443 warrant monitoring: these suggest a workflow attempted direct GitHub API access without going through the MCP gateway, which is the correct integration path.

Most Frequently Blocked Domains

Domain	Times Blocked	Category
(unknown)	544	Internal/unresolvable connections
github.com:443	1	GitHub direct access (use MCP instead)
api.github.com:443	1	GitHub API direct access (use MCP instead)

View Detailed Request Patterns by Workflow

Workflow	Allowed	Blocked	Block Rate
CLI Consistency Checker	279	56	17%
PR Sous Chef	101	35	26%
Package Specification Librarian	116	34	23%
UK AI Operational Resilience	109	33	23%
Daily SPDD Spec Planner	96	31	24%
Daily Agent of the Day Blog Writer	89	27	23%
Weekly Issue Summary	76	27	26%
Workflow Normalizer	64	24	27%
The Daily Repository Chronicle	65	24	27%
Repository Quality Improvement Agent	60	23	28%
Contribution Check	75	21	22%
Daily Malicious Code Scan Agent	490	18	4%
Breaking Change Checker	56	18	24%
Auto-Triage Issues	41	16	28%
Test Quality Sentinel	50	16	24%

View Complete Blocked Domains List

• (unknown) — 544 blocked requests (internal/unresolvable)
• api.github.com:443 — 1 blocked request
• github.com:443 — 1 blocked request

🔒 Firewall Security Recommendations

1. Investigate (unknown) blocked requests: The 544 (unknown) domain blocks should be audited to understand what connection targets are being attempted. These may be benign (container-internal calls) but could also indicate workflows attempting to reach unallowed endpoints by IP address rather than hostname.
2. Review direct GitHub API access: The single blocked requests to github.com:443 and api.github.com:443 suggest a workflow is attempting direct API access. Per AGENTS.md guidelines, workflows using the Copilot engine must use the GitHub MCP server (toolsets: [default]) — not direct api.github.com access.
3. High block-rate workflows: Workflows with 25-28% block rates (Auto-Triage Issues, Repository Quality Improvement Agent, Workflow Normalizer) should be reviewed to confirm all needed domains are in their network.allowed configuration.
4. Daily Malicious Code Scan Agent: This workflow has an unusually high allowed-request count (490) with a low block rate (4%). Its network access pattern should be periodically reviewed given its sensitive purpose.

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🔒 DIFC Integrity Analysis

Key DIFC Metrics

Metric	Value
Total filtered events	0
Unique tools filtered	0
Unique workflows affected	0
Most common filter reason	N/A
Busiest day	N/A

📈 DIFC Events Over Time

No DIFC integrity-filtered events were recorded in the last 7 days. This is a healthy baseline — the Data Integrity and Flow Control system found no tool calls requiring integrity filtering across all agentic workflow runs.

🔧 Top Filtered Tools

No tool calls were filtered by the DIFC system in the analysis window.

🏷️ Filter Reasons and Tags

No integrity or secrecy tags were triggered in the analysis window.

📋 Per-Workflow DIFC Breakdown

No DIFC events to report.

📋 Per-Server DIFC Breakdown

No DIFC events to report.

👤 Per-User DIFC Breakdown

No DIFC events to report.

💡 DIFC Tuning Recommendations

1. Maintain current configuration: Zero filtered events indicates the DIFC policy is well-calibrated — no legitimate tool calls are being over-blocked.
2. Continue monitoring: Even with zero events today, track daily trends over time. A sudden spike in filtered events would warrant immediate investigation.
3. Review after new workflow deployments: When new workflows are added that use novel MCP servers or tool combinations, verify DIFC coverage is appropriate.

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Generated by the Daily Security Observability workflow (consolidated from Daily Firewall Reporter + Daily DIFC Analyzer)
Analysis window: Last 7 days | Repository: github/gh-aw
Run: https://github.com/github/gh-aw/actions/runs/26771769662

Generated by 🔒 Daily Security Observability Report · sonnet46 3.4M · ◷

• expires on Jun 4, 2026, 6:22 PM UTC