CVE-2026-32881
ewe has an Overly Permissive List of Allowed Inputs
ewe is a Gleam web server. ewe is a Gleam web server. Versions 0.6.0 through 3.0.4 are vulnerable to authentication bypass or spoofed proxy-trust headers. Chunked transfer encoding trailer handling merges declared trailer fields into req.headers after body parsing, but the denylist only blocks 9 header names. A malicious client can exploit this by declaring these headers in the Trailer field and appending them after the final chunk, causing request.set_header to overwrite legitimate values (e.g., those set by a reverse proxy). This enables attackers to forge authentication credentials, hijack sessions, bypass IP-based rate limiting, or spoof proxy-trust headers in any downstream middleware that reads headers after ewe.read_body is called. This issue has been fixed in version 3.0.5.
| CWE | CWE-183 |
| Vendor | vshakitskiy |
| Product | ewe |
| Published | Mar 20, 2026 |
| Last Updated | Mar 20, 2026 |
Get instant alerts for vshakitskiy ewe
Be the first to know when new medium vulnerabilities affecting vshakitskiy ewe are published — delivered to Slack, Telegram or Discord.
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N