CRITICALCVE-2026-29046Published Modified CNA GitHub_M
CVE-2026-29046: TinyWeb: HTTP Header Control Character Injection into CGI Environment
TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32. Prior to version 2.04, TinyWeb accepts request header values and later maps them into CGI environment variables (HTTP_*). The parser did not strictly reject dangerous control characters in header lines and header values, including CR, LF, and NUL, and did not consistently defend against encoded forms such as %0d, %0a, and %00. This can enable header value confusion across parser boundaries and may create unsafe data in the CGI execution context. This issue has been patched in version 2.04.
Metrics
- CVSS v4.0
- 9.2
- Severity
- CRITICAL
- Fixed in
- —
- Affected Products
- 1
Affected packages
- maximmasiutin / TinyWeb< 2.04
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L