Medium [CVE-2026-38969] Request smuggling via re-parsing of Content-Length header
This medium-severity Red Hat Linux advisory covers CVE-2026-38969.
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Summary
Request smuggling via re-parsing of Content-Length header. Red Hat rates this moderate (CVSS 6.5).
Weakness: CWE-444. Red Hat lists fixing advisory RHSA-2026:34975 with package rust-main-1.96.1-1.hum1.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
- rust-main-1.96.1-1.hum1
- RHSA-2026:34975
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
Mitigation checklist
- Do not expose WEBrick directly to untrusted network traffic. WEBrick is not designed for production use and should be replaced with a production-grade Ruby application server (e.g., Puma, Unicorn) behind a reverse proxy (e.g., nginx, Apache, HAProxy) that performs its own Content-Length validation and strips or rejects requests with conflicting transfer encoding headers. A patch is available: https://github.com/ruby/webrick/pull/199
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
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