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.
Published: 2026-03-06
Score: 9.2 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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History

Mon, 16 Mar 2026 15:15:00 +0000

Type Values Removed Values Added
First Time appeared Ritlabs
Ritlabs tinyweb
CPEs cpe:2.3:a:ritlabs:tinyweb:*:*:*:*:*:*:*:*
Vendors & Products Ritlabs
Ritlabs tinyweb
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L'}


Fri, 06 Mar 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 06 Mar 2026 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Maximmasiutin
Maximmasiutin tinyweb
Vendors & Products Maximmasiutin
Maximmasiutin tinyweb

Fri, 06 Mar 2026 03:30:00 +0000

Type Values Removed Values Added
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.
Title TinyWeb: HTTP Header Control Character Injection into CGI Environment
Weaknesses CWE-114
CWE-20
CWE-74
CWE-93
References
Metrics cvssV4_0

{'score': 9.2, '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'}


Subscriptions

Maximmasiutin Tinyweb
Ritlabs Tinyweb
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-06T16:10:18.974Z

Reserved: 2026-03-03T17:50:11.243Z

Link: CVE-2026-29046

cve-icon Vulnrichment

Updated: 2026-03-06T16:00:28.596Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-06T04:16:08.740

Modified: 2026-03-16T15:00:12.227

Link: CVE-2026-29046

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-06T14:56:10Z