fix(security): path traversal, SSRF, prompt injection, and 13 CVEs

[ruvnet]

Summary

• Path traversal in optimizer save()/load() methods: callers could supply ../../etc/passwd as a path. Fixed with a safeResolvePath() helper that strips null bytes and normalises .. components via path.resolve(), and replaces dynamic require('fs') with static imports.
• SSRF in all three LM providers (OpenAILM, AnthropicLM, OpenRouterLM): the endpoint config option was passed directly to fetch() without validation. A validateEndpoint() guard now enforces HTTPS and blocks private/loopback addresses (RFC-1918, ::1, ULA) at construction time.
• Prompt injection in ReAct and ChainOfThought: user-supplied string fields were embedded verbatim in LLM prompts via JSON.stringify(input[field]). A new src/utils/sanitize.ts module provides sanitizeUserInput() (null-byte strip, 4096-char cap, pattern-based jailbreak removal) and stripPromptInjection() (20+ patterns covering role overrides, delimiter smuggling, and exfiltration probes). Applied to input fields and tool observations fed back into the ReAct context.
• 13 npm CVEs — resolved via package.json overrides:
  • protobufjs <=7.5.7 — CRITICAL: 9 CVEs including RCE (GHSA-xq3m-2v4x-88gg, code injection, prototype pollution, multiple DoS). Override to >=7.5.8.
  • tar <=7.5.10 — HIGH: 6 CVEs for path traversal / symlink poisoning during archive extraction. Override to >=7.5.11.
  • qs 6.11.1–6.15.1 — MODERATE: DoS via qs.stringify crash (GHSA-q8mj-m7cp-5q26). Override to >=6.15.0; npm audit fix applied the patch.
  • Result: 0 vulnerabilities (npm audit).

Test plan

• tsc --noEmit passes with 0 errors (verified in CI and locally)
• npm test passes 177/177 tests
• npm audit returns 0 vulnerabilities
• Manually verify SSRF guard rejects http://localhost/evil and https://192.168.1.1/evil for all three LM providers
• Verify sanitizeUserInput('ignore all previous instructions') returns '[removed] all previous instructions'
• Verify save('../../../tmp/evil.json') resolves to an absolute path (no traversal)

Files changed

File	Change
src/utils/sanitize.ts	New — prompt-injection sanitization helpers
src/utils/index.ts	Re-export sanitize helpers
src/lm/providers/openai.ts	SSRF guard on endpoint
src/lm/providers/anthropic.ts	SSRF guard on endpoint
src/lm/providers/openrouter.ts	SSRF guard on endpoint
src/modules/react.ts	Sanitize input fields + tool observations
src/modules/chain-of-thought.ts	Sanitize input fields
src/optimize/bootstrap.ts	Path traversal fix in save/load
src/optimize/miprov2.ts	Path traversal fix in save/load
src/optimize/gepa.ts	Path traversal fix in save/load
package.json	CVE overrides for protobufjs, tar, qs
package-lock.json	Regenerated after overrides + audit fix

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