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feat(lab7): trivy + PSS restricted + conftest gate #2

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# Lab 7 — Submission

## Task 1: Trivy Image + Config Scan

### Image scan severity breakdown
| Severity | Total | With fix available |
|----------|------:|------------------:|
| Critical | 4 | 4 |
| High | 6 | 6 |
| **Total** | 10 | 10 |

### Top 10 CVEs with fixes
| CVE | Severity | Package | Installed | Fix |
|-----|----------|---------|-----------|-----|
| CVE-2023-46233 | CRITICAL | crypto-js | 3.3.0 | 4.2.0 |
| CVE-2015-9235 | CRITICAL | jsonwebtoken | 0.1.0 | 4.2.2 |
| CVE-2015-9235 | CRITICAL | jsonwebtoken | 0.4.0 | 4.2.2 |
| CVE-2019-10744 | CRITICAL | lodash | 2.4.2 | 4.17.12 |
| CVE-2026-45447 | HIGH | libssl3t64 | 3.5.5-1~deb13u2 | 3.5.6-1~deb13u2 |
| NSWG-ECO-428 | HIGH | base64url | 0.0.6 | >=3.0.0 |
| CVE-2020-15084 | HIGH | express-jwt | 0.1.3 | 6.0.0 |
| CVE-2022-25881 | HIGH | http-cache-semantics | 3.8.1 | 4.1.1 |
| CVE-2022-23539 | HIGH | jsonwebtoken | 0.1.0 | 9.0.0 |
| NSWG-ECO-17 | HIGH | jsonwebtoken | 0.1.0 | >=4.2.2 |

### Compared to Lab 4's Grype scan
Look back at your Lab 4 Grype results on the same image. Pick **two CVEs**:
1. One that BOTH Grype and Trivy found : CVE-2019-10744, CRITICAL, lodash, installed 2.4.2 and fix 4.17.12
2. One that ONE tool found and the OTHER missed
For each: explain why the tools differ (DB freshness? Different package matching?
EPSS scoring? Lecture 7 + Lecture 4 give context.) (2-3 sentences per CVE.):
**Grype found, Trivy missed**
GHSA-5mrr-rgp6-x4gr, Critical, marsdb, installed 0.6.11 with no fix. Trivy and Grype use different databaseses. This vulnerability is maybe only present in GitHub security advisory database.

**Trivy found, Grype missed**
CVE-2026-45447, High, libssl3t64 v3.5.5-1~deb13u2, fix 3.5.6-1~deb13u2. In Grype results, this vulnerability was maybe not in the latest update of databases Grype uses. And Trivy may have had already updated databasese.