CVE-2008-3906: Mono

Medium severity, CVSS 4.3. EPSS: 7.1% chance of exploitation in the next 30 days.

CRLF injection vulnerability in Sys.Web in Mono 2.0 and earlier allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via CRLF sequences in the query string.

Affected products

• Mono Mono: version 1.0 only; version 1.0.5 only; version 1.1.4 only; version 1.1.8.3 only; version 1.1.13 only; version 1.1.13.4 only; …
• Mono Project Mono: up to and including 2.0; version 1.2.1 only; version 1.2.2 only; version 1.2.3 only; version 1.2.4 only; version 1.2.5 only; …

Published 2008-09-04. Last modified 2026-06-16.