Unrated severityNVD Advisory· Published Mar 6, 2026· Updated Mar 6, 2026
TinyWeb: HTTP Header Control Character Injection into CGI Environment
CVE-2026-29046
Description
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.
Affected products
1- Range: < 2.04
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
2- github.com/maximmasiutin/TinyWeb/commit/53aa8b6e5146491d7be57920e3fc50d7a34e4d5amitrex_refsource_MISC
- github.com/maximmasiutin/TinyWeb/security/advisories/GHSA-r3gf-pg2c-m7mcmitrex_refsource_CONFIRM
News mentions
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