[security-observability] Daily Security Observability Report — 2026-06-07

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Executive Summary

This daily security observability report covers the 7-day analysis window ending 2026-06-07, combining firewall traffic intelligence from 23 agentic workflow runs with DIFC integrity filtering data. The firewall analysis reveals a 24.0% block rate (137 of 572 requests blocked), with all blocked traffic categorized as (unknown) destinations — indicating workflows are making network calls to unrecognized endpoints that fall outside explicit allow-list policies. The DIFC gateway recorded no integrity-filtered events during this period, suggesting that tool call integrity controls are operating cleanly without false positives or policy violations.

The most notable finding is that five high-value workflows — Test Quality Sentinel, Delight, PR Code Quality Reviewer, PR Sous Chef, and Matt Pocock Skills Reviewer — collectively generated all 137 blocked requests. Delight had the highest block rate at 79% (31/39 requests blocked), which warrants immediate investigation. No cross-cutting signals were observed between firewall blocks and DIFC filtering, as DIFC saw zero events.

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🔥 Firewall Analysis

Key Firewall Metrics

Metric	Value
Workflows analyzed (firewall-enabled)	23
Total network requests monitored	572
Allowed requests	435
Blocked requests	137
Block rate	24.0%
Total unique allowed domains	5
Blocked domain category	(unknown) — unrecognized destinations

📈 Firewall Request Trends

All 23 firewall-monitored runs occurred on 2026-06-07, with 435 allowed and 137 blocked requests. Historical data from 2026-05-20 (previous reporting period, 62 runs aggregated) shows a total of 2,560 allowed vs 735 blocked requests — suggesting the current block rate (~24%) is slightly lower than the historical average (~22%), but within normal range. The historical allowed-domain list is broader, including api.openai.com, proxy.golang.org, and pypi.org.

Top Blocked Workflows

All blocked requests are categorized as (unknown) domain — the firewall is intercepting requests to destinations not matched by any explicit policy rule. Delight has the highest block rate (79%), with 31 of 39 requests blocked. Test Quality Sentinel and PR Code Quality Reviewer follow with 30–32 blocked requests each. The PR Sous Chef workflow ran 3 times, contributing 21 blocked requests per run (63 total across runs).

Most Frequently Blocked Workflows

Workflow	Blocked Requests	Allowed Requests	Block Rate
Test Quality Sentinel	32	76	30%
Delight	31	8	79%
PR Code Quality Reviewer	30	60	33%
PR Sous Chef (per run ×3)	21	32	40%
Matt Pocock Skills Reviewer	9	20	31%

Allowed Domains (Firewall Allowlist)

Domain	Workflows Using
api.githubcopilot.com:443	Most copilot-engine workflows
api.anthropic.com:443	Design Decision Gate, Claude workflows
github.com:443	Test Quality Sentinel
api.github.com:443	Security Observability Report
o205451.ingest.us.sentry.io	Agent Persona Explorer, Daily Formal Spec Verifier

View Detailed Request Patterns by Workflow

Workflow	Total Requests	Allowed	Blocked	Allowed Domains
Agent Persona Explorer	19	19	0	api.githubcopilot.com:443, o205451.ingest.us.sentry.io
Daily Formal Spec Verifier	35	35	0	api.githubcopilot.com:443, o205451.ingest.us.sentry.io
Daily Issues Report Generator	2	2	0	api.githubcopilot.com:443
Delight	39	8	31	api.githubcopilot.com:443
Design Decision Gate 🏗️	13	13	0	api.anthropic.com:443
Matt Pocock Skills Reviewer	29	20	9	api.githubcopilot.com:443
PR Code Quality Reviewer	90	60	30	api.githubcopilot.com:443
PR Description Updater	36	36	0	api.githubcopilot.com:443
PR Sous Chef	53	32	21	api.githubcopilot.com:443
Smoke CI	2	2	0	api.githubcopilot.com:443
Test Quality Sentinel	108	76	32	api.githubcopilot.com:443, github.com:443

View Complete Blocked Domain Analysis

All 137 blocked requests fall into the (unknown) domain category. This means the firewall's egress filter intercepted connections to destinations that are not present in the workflow's allowed_domains policy configuration. These are likely:

• Internal tooling or plugin endpoints called by MCP servers
• Dynamic URLs constructed at runtime (e.g., webhook callbacks, CDN assets)
• DNS lookups or indirect connections triggered by allowed domains

No specific malicious domains were identified. The (unknown) classification indicates the firewall is working correctly — it is blocking unapproved outbound connections.

🔒 Firewall Security Recommendations

1. Investigate Delight workflow (79% block rate): The Delight workflow has an unusually high block rate. Review its network calls to determine if it requires additional allowed domains, or if it is performing unintended network operations.
2. Audit (unknown) domain connections: Enable verbose firewall logging in affected workflows (Test Quality Sentinel, PR Code Quality Reviewer, PR Sous Chef) to identify what specific endpoints are being blocked. These may be legitimate internal calls that need to be added to the policy.
3. Review PR review workflows: Three PR-related workflows (Sous Chef, Code Quality Reviewer, Matt Pocock Reviewer) all show blocked requests. They likely share a common tool or MCP server making outbound calls — consider a shared allowlist for PR-review workflows.
4. Consider staged allowlist expansion: If blocked calls are legitimate, update the workflow YAML allowed_domains lists. Use the historical allowed domain list as a reference: api.openai.com, proxy.golang.org, pypi.org, registry.npmjs.org were all used by prior workflow runs.

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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

No DIFC integrity-filtered events were detected in the last 7 days. This indicates that all tool calls across agentic workflows passed the Data Integrity and Flow Control policy checks without triggering any integrity or secrecy filters.

📈 DIFC Events Over Time

No events to visualize. The DIFC gateway operated cleanly throughout the analysis window, with zero blocked tool invocations.

💡 DIFC Tuning Recommendations

1. Maintain current configuration: The zero-event result indicates DIFC policies are well-tuned for current workflow patterns. No immediate changes are needed.
2. Monitor on new workflow onboarding: When adding new agentic workflows that interact with external data sources or cross-trust-boundary tools, re-evaluate DIFC integrity tags to ensure proper coverage.
3. Enable DIFC logging on high-risk workflows: Consider enabling verbose DIFC event logging on workflows that process external user input (e.g., issue comments, PR descriptions) to proactively detect any future integrity violations.

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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: §27097939862

Generated by 🔒 Daily Security Observability Report · ⌖ 28.5 AIC · ⊞ 24K · ◷

• expires on Jun 10, 2026, 4:38 PM UTC

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This discussion has been marked as outdated by Daily Security Observability Report.

A newer discussion is available at Discussion #37877.