Cloudflare Error 1035 / 1036: Invalid request rewrite (invalid URI path / query string)
A Transform Rule (URL rewrite) produced an invalid path or query string.
Exact message you may see
Invalid request rewrite (invalid URI path)Invalid request rewrite (invalid query string)
Seen on:
Cloudflare
Meaning
Rewrite expressions that build a path without a leading slash, include illegal characters, or create an invalid query string make Cloudflare reject the request.
Common causes
- Rewrite expression produces a path without leading “/”
- Invalid characters or encoding in the rewritten URL
- Concat/regex_replace mistakes in the expression
⚡ Quick fix
- Test the rewrite expression with sample URLs
- Ensure the new path starts with /
- Disable the rule to confirm
Detailed fix by platform
Cloudflare
- bash
# Rules → Transform Rules → Rewrite URL: example dynamic path concat("/v2", http.request.uri.path)
How to diagnose
- Rule — Which rewrite matched?
- Output — Resulting path/query
🔧 Still not fixed?
Many errors look alike. If the steps above didn’t solve it, one of these is probably what you’re facing:
Similar errors
Most viewed in Cloudflare
Other ways to find it
Where this error sits
Origin: Edge & web server. Errors that are often confused with or caused by this one (click to open):
🧠 Still stuck? Analyze your error
Paste the full message, response headers or stack trace — we'll detect the platform and point to the most likely cause.
💬 What worked for others
No tips yet — did something else fix this for you?
Share what worked for you
Tips are checked by an editor before they appear. Links are removed.
Did this fix work for you?
Report a correction or suggest an improvement
Last updated 13 Oct 2026