Cross File Taint
Cross-file taint analysis — user input → dangerous sinks across module boundaries.
One of 122 modules in the GateTest scan suite. Catches the issue before it reaches code review, and on paid tiers opens a pull request with the fix already written.
req.body.path → fs.readFile via 3 hops, no validation
Why we catch it
OWASP-grade scanning that goes beyond CVE lookups into your actual code paths.
The Cross File Taint module sits in this category alongside 6 related modules. Together they form one of the layers of a GateTest scan — checks fire in parallel, findings cluster by root cause, and on paid tiers the AI auto-fix loop reads each finding, writes the fix, validates against the scanner, and opens a PR.
How GateTest covers cross file taint
- Runs on every Full scan and above. Full ($99), Scan + Fix ($199) and Forensic ($399) — every repository tier except Quick ($29), which runs only 4 modules. No additional configuration.
- Free CLI.
npm i -g @gatetest/cli && gatetest --module crossFileTaintagainst any local repo. No paywall on the scanning itself. - AI auto-fix PR. Scan + Fix tier opens a pull request with the fix, a regression test, and a pair-review by a second AI reviewer. Forensic Scan tier adds per-finding diagnosis and cross-finding attack-chain correlation.
- Honest confidence rating. Findings come with high / medium / low confidence so noisy patterns don't block the gate. The confidence-calibrator trainer reads customer suppressions and tightens rules over time.
Scan your repo for cross file taint
Free preview of the headline findings. Pay per scan, not per seat — one-time scans never auto-renew.
Frequently asked questions
What does the Cross File Taint module catch?
Cross-file taint analysis — user input → dangerous sinks across module boundaries. Example finding: req.body.path → fs.readFile via 3 hops, no validation
Does GateTest fix Cross File Taint issues automatically?
Yes — on the Scan + Fix tier ($199) and Forensic Scan tier ($399), the fix engine reads the finding, writes the fix, validates against the scanner, writes a regression test, and opens a pull request for your review.
Which tiers include the Cross File Taint module?
Full ($99), Scan + Fix ($199) and Forensic ($399) — every repository tier except Quick ($29), which runs only 4 modules.
Can I run the Cross File Taint module from the CLI for free?
Yes — install with `npm i -g @gatetest/cli` and run `gatetest --module crossFileTaint`. The local CLI is free; paid tiers add AI auto-fix and the cross-finding correlation work.