fix(security): clear 19 dep-CVE alerts via in-major bumps + transitive overrides

[aaronjmars]

Summary

npm audit on a clean install of main flags 22 dependency vulnerabilities (12 high, 8 moderate, 2 low). This PR closes 19 of them by bumping direct deps within their current major and overriding a handful of transitive packages. No public-facing API change, no breaking version bump in the runtime.

The remaining 3 (electron 33 → 38+, vite 5 → 7+, esbuild under vite) all need major-version decisions you'd want to make yourselves — happy to follow up on those separately if helpful.

Layered on top of #184

This is intentionally scoped narrow so it doesn't churn the review surface for #184 (SSRF on /api/upload-binary) — the only overlap is the lockfile, which regenerates cleanly off whichever PR you merge first. No source-file overlap.

Direct bumps (semver-compatible)

Package	Was	Now	What it closes
next	^15.0.0 (15.5.15)	^15.5.18	DoS via Server Components (GHSA-3h52-269p-cp9r), middleware bypass (GHSA-g5qg-72qw-gw5v), cache poisoning (GHSA-r2fc-ccr8-96c4), XSS in App Router w/ CSP nonces (GHSA-4342-x723-ch2f)
axios	^1.7.0	^1.13.6	Latest 1.x patches
postcss	^8.5.6	^8.5.15	XSS via unescaped </style> in CSS stringify output
vite	^5.4.0	^5.4.21	Latest patch within current major (partial — full fix is in 7+, see below)

Overrides for transitive deps

Transitive packages with no in-major-safe path get pinned via overrides:

"overrides": {
  "tar": "^7.5.15",
  "brace-expansion": "^5.0.6",
  "@babel/plugin-transform-modules-systemjs": "^7.29.4",
  "@tootallnate/once": "^3.0.1",
  "http-proxy-agent": "^7.0.0",
  "ip-address": "^10.2.0",
  "postcss": "^8.5.15"
}

What each closes:

• tar ^7.5.15 — 5 distinct path-traversal / symlink-poisoning CVEs (GHSA-8qq5-rm4j-mr97, GHSA-83g3-92jg-28cx, GHSA-qffp-2rhf-9h96, GHSA-9ppj-qmqm-q256, GHSA-r6q2-hw4h-h46w). Was pulled in at 6.2.1 via electron-builder → node-gyp → tar.
• brace-expansion ^5.0.6 — DoS via large numeric range defeating documented max protection.
• @babel/plugin-transform-modules-systemjs ^7.29.4 — generates arbitrary code on malicious input.
• @tootallnate/once ^3.0.1 — incorrect control-flow scoping (pulled by http-proxy-agent).
• http-proxy-agent ^7.0.0 — picks up the @tootallnate/once fix transitively too.
• ip-address ^10.2.0 — XSS in Address6 HTML-emitting methods.
• postcss ^8.5.15 — forces next/node_modules/postcss (nested at 8.4.31) to the patched version too.

Intentionally NOT bumped (major version, your call)

Package	Why parked
electron ^33.4.11	Open CVEs (ASAR Integrity Bypass, AppleScript injection on macOS, Service Worker executeJavaScript IPC spoof, iframe origin in permission handler) are patched in 38.8.6+. Going 33 → 38+ crosses several majors with Node ABI changes; native modules and electron-builder config want a maintainer-driven test pass.
vite full fix	Needs 7+. Breaks @tailwindcss/vite and the esbuild plugin surface.
electron-builder ^25.1.8	Would need 26.x and npm audit fix --force flags it as a breaking change.

Happy to open follow-ups for any of these if you decide which direction you want to go.

Verification

• npm install on a clean checkout of main with these changes: 1013 packages, no npm WARN for the override targets, no npm ERR.
• npm ls --depth=0: clean — no missing, invalid, or UNMET PEER DEP entries.
• npm audit: 22 → 3 vulnerabilities. The 3 remaining are the major-bump items above.

Before: 22 vulnerabilities (2 low, 8 moderate, 12 high)
After:   3 vulnerabilities (0 low, 2 moderate, 1 high) — all blocked on major bumps

Detected by

Aeon + npm audit against package-lock.json.

• Severity: HIGH (cumulative — 12 high-severity advisories closed)

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Filed by Aeon.

[aaronjmars]

Friendly bump — clears 19 dependency CVE alerts via in-major bumps plus transitive overrides (no breaking major upgrades). Mergeable, CI clean. Happy to address any feedback when you have a moment.