security: enforce frozen lockfile during setup#614
Closed
halbert04 wants to merge 1 commit intogarrytan:mainfrom
Closed
security: enforce frozen lockfile during setup#614halbert04 wants to merge 1 commit intogarrytan:mainfrom
halbert04 wants to merge 1 commit intogarrytan:mainfrom
Conversation
bun install with caret ranges (^1.58.2) resolves to latest compatible versions at install time. A compromised npm publish of playwright or puppeteer-core would get code execution on every setup run. Using --frozen-lockfile ensures the resolved versions in bun.lock are used exactly, preventing dependency confusion attacks. The fallback in the .agents/ generation block (line 199) already uses --frozen-lockfile. This makes the main build block consistent. Made-with: Cursor
Owner
|
Thanks! Frozen lockfile enforcement landed with co-author credit. Ships in the next release. |
garrytan
added a commit
that referenced
this pull request
Apr 13, 2026
bun install without --frozen-lockfile resolves ^semver ranges from npm on every run. If an attacker publishes a compromised compatible version of any dependency, the next ./setup pulls it silently. Add --frozen-lockfile with fallback to plain install (for fresh clones where bun.lock may not exist yet). Matches the pattern already used in the .agents/ generation block (line 237). Closes #614 Co-Authored-By: Alberto Martinez <halbert04@users.noreply.github.com>
4 tasks
garrytan
added a commit
that referenced
this pull request
Apr 13, 2026
* fix(security): validateOutputPath symlink bypass — check file-level symlinks validateOutputPath() previously only resolved symlinks on the parent directory. A symlink at /tmp/evil.png → /etc/crontab passed the parent check (parent is /tmp, which is safe) but the write followed the symlink outside safe dirs. Add lstatSync() check: if the target file exists and is a symlink, resolve through it and verify the real target is within SAFE_DIRECTORIES. ENOENT (file doesn't exist yet) falls through to the existing parent-dir check. Closes #921 Co-Authored-By: Yunsu <Hybirdss@users.noreply.github.com> * fix(security): shell injection in bin/ scripts — use env vars instead of interpolation gstack-settings-hook interpolated $SETTINGS_FILE directly into bun -e double-quoted blocks. A path containing quotes or backticks breaks the JS string context, enabling arbitrary code execution. Replace direct interpolation with environment variables (process.env). Same fix applied to gstack-team-init which had the same pattern. Systematic audit confirmed only these two scripts were vulnerable — all other bin/ scripts already use stdin piping or env vars. Closes #858 Co-Authored-By: Gus <garagon@users.noreply.github.com> * fix(security): cookie-import path validation bypass + hardcoded /tmp Two fixes: 1. cookie-import relative path bypass (#707): path.isAbsolute() gated the entire validation, so relative paths like "sensitive-file.json" bypassed the safe-directory check entirely. Now always resolves to absolute path with realpathSync for symlink resolution, matching validateOutputPath(). 2. Hardcoded /tmp in cookie-import-browser (#708): openDbFromCopy used /tmp directly instead of os.tmpdir(), breaking Windows support. Also adds explicit imports for SAFE_DIRECTORIES and isPathWithin in write-commands.ts (previously resolved implicitly through bundler). Closes #852 Co-Authored-By: Toby Morning <urbantech@users.noreply.github.com> * fix(security): redact form fields with sensitive names, not just type=password Form redaction only applied to type="password" fields. Hidden and text fields named csrf_token, api_key, session_id, etc. were exposed unredacted in LLM context, leaking secrets. Extend redaction to check field name and id against sensitive patterns: token, secret, key, password, credential, auth, jwt, session, csrf, sid, api_key. Uses the same pattern style as SENSITIVE_COOKIE_NAME. Closes #860 Co-Authored-By: Gus <garagon@users.noreply.github.com> * fix(security): restrict session file permissions to owner-only Design session files written to /tmp with default umask (0644) were world-readable on shared systems. Sessions contain design prompts and feedback history. Set mode 0o600 (owner read/write only) on both create and update paths. Closes #859 Co-Authored-By: Gus <garagon@users.noreply.github.com> * fix(security): enforce frozen lockfile during setup bun install without --frozen-lockfile resolves ^semver ranges from npm on every run. If an attacker publishes a compromised compatible version of any dependency, the next ./setup pulls it silently. Add --frozen-lockfile with fallback to plain install (for fresh clones where bun.lock may not exist yet). Matches the pattern already used in the .agents/ generation block (line 237). Closes #614 Co-Authored-By: Alberto Martinez <halbert04@users.noreply.github.com> * fix: remove duplicate recursive chmod on /tmp in Dockerfile.ci chmod -R 1777 /tmp recursively sets sticky bit on files (no defined behavior), not just the directory. Deduplicate to single chmod 1777 /tmp. Closes #747 Co-Authored-By: Maksim Soltan <Gonzih@users.noreply.github.com> * fix(security): learnings input validation + cross-project trust gate Three fixes to the learnings system: 1. Input validation in gstack-learnings-log: type must be from allowed list, key must be alphanumeric, confidence must be 1-10 integer, source must be from allowed list. Prevents injection via malformed fields. 2. Prompt injection defense: insight field checked against 10 instruction-like patterns (ignore previous, system:, override, etc.). Rejected with clear error message. 3. Cross-project trust gate in gstack-learnings-search: AI-generated learnings from other projects are filtered out. Only user-stated learnings cross project boundaries. Prevents silent prompt injection across codebases. Also adds trusted field (true for user-stated source, false for AI-generated) to enable the trust gate at read time. Closes #841 Co-Authored-By: Ziad Al Sharif <Ziadstr@users.noreply.github.com> * feat(security): track cookie-imported domains and scope cookie imports Foundation for origin-pinned JS execution (#616). Tracks which domains cookies were imported from so the JS/eval commands can verify execution stays within imported origins. Changes: - BrowserManager: new cookieImportedDomains Set with track/get/has methods - cookie-import: tracks imported cookie domains after addCookies - cookie-import-browser: tracks domains on --domain direct import - cookie-import-browser --all: new explicit opt-in for all-domain import (previously implicit behavior, now requires deliberate flag) Closes #615 Co-Authored-By: Alberto Martinez <halbert04@users.noreply.github.com> * feat(security): pin JS/eval execution to cookie-imported origins When cookies have been imported for specific domains, block JS execution on pages whose origin doesn't match. Prevents the attack chain: 1. Agent imports cookies for github.com 2. Prompt injection navigates to attacker.com 3. Agent runs js document.cookie → exfiltrates github cookies assertJsOriginAllowed() checks the current page hostname against imported cookie domains with subdomain matching (.github.com allows api.github.com). When no cookies are imported, all origins allowed (nothing to protect). about:blank and data: URIs are allowed (no cookies at risk). Depends on #615 (cookie domain tracking). Closes #616 Co-Authored-By: Alberto Martinez <halbert04@users.noreply.github.com> * feat(security): add persistent command audit log Append-only JSONL audit trail for all browse server commands. Unlike in-memory ring buffers, the audit log persists across restarts and is never truncated. Each entry records: timestamp, command, args (truncated to 200 chars), page origin, duration, status, error (truncated to 300 chars), hasCookies flag, connection mode. All writes are best-effort — audit failures never block command execution. Log stored at ~/.gstack/.browse/browse-audit.jsonl. Closes #617 Co-Authored-By: Alberto Martinez <halbert04@users.noreply.github.com> * fix(security): block hex-encoded IPv4-mapped IPv6 metadata bypass URL constructor normalizes ::ffff:169.254.169.254 to ::ffff:a9fe:a9fe (hex form), which was not in the blocklist. Similarly, ::169.254.169.254 normalizes to ::a9fe:a9fe. Add both hex-encoded forms to BLOCKED_METADATA_HOSTS so they're caught by the direct hostname check in validateNavigationUrl. Closes #739 Co-Authored-By: Osman Mehmood <mehmoodosman@users.noreply.github.com> * chore: bump version and changelog (v0.16.4.0) Security wave 3: 12 fixes, 7 contributors. Cookie origin pinning, command audit log, domain tracking. Symlink bypass, path validation, shell injection, form redaction, learnings injection, IPv6 SSRF, session permissions, frozen lockfile. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Yunsu <Hybirdss@users.noreply.github.com> Co-authored-by: Gus <garagon@users.noreply.github.com> Co-authored-by: Toby Morning <urbantech@users.noreply.github.com> Co-authored-by: Alberto Martinez <halbert04@users.noreply.github.com> Co-authored-by: Maksim Soltan <Gonzih@users.noreply.github.com> Co-authored-by: Ziad Al Sharif <Ziadstr@users.noreply.github.com> Co-authored-by: Osman Mehmood <mehmoodosman@users.noreply.github.com> Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
bun installtobun install --frozen-lockfilein the main build block of thesetupscriptplaywright,puppeteer-core, or any transitive dependency resolves to a malicious version at install time.agents/generation block (line 199) already uses--frozen-lockfilewith a fallback — this makes the main build path consistentWhy this matters
gstack's setup runs
bun installwhich resolves^1.58.2to the latest compatible version. If an attacker publishes a compromised version of any dependency in the resolution range, every new./setupor/gstack-upgraderun would pull it. With--frozen-lockfile, only versions pinned inbun.lockare installed.Risk
Low. If
bun.lockis missing or stale (e.g., after a dependency bump inpackage.jsonwithout runningbun installto update the lock), setup will fail with a clear error instead of silently resolving new versions. This is the correct behavior — maintainers should commit an updated lockfile.Test plan
./setupsucceeds with existingbun.lock./setupfails clearly whenbun.lockis deleted (expected: error message about frozen lockfile)Made with Cursor