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CVE-2026-29046

Ritlabs Tinyweb injection

8.2 HIGHPublic exploitEPSS 0.58%
  1. Published6 Mar 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityHigh
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

Affected products

Ritlabs Tinyweb< 2.04

Remediation

Fixed in
Ritlabs Tinyweb≥ 2.04

References

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Frequently asked

Is CVE-2026-29046 being actively exploited?

CVE-2026-29046 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.58%.

How severe is CVE-2026-29046?

CVE-2026-29046 has a CVSS 3.1 base score of 8.2, rated high. EPSS estimates a 0.58% probability of exploitation.

Which products are affected by CVE-2026-29046?

Affected products include Ritlabs Tinyweb.

How do I fix CVE-2026-29046?

Upgrade affected software to a fixed version, for example Ritlabs Tinyweb 2.04 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.