CVE-2026-29046: TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32

Q: How do I fix CVE-2026-29046?

tinyweb: upgrade to 2.04. Exact commands for each OS are on this page.

Q: Is CVE-2026-29046 being exploited?

CVE-2026-29046 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-29046 affect?

CVE-2026-29046 affects tinyweb. Severity is high (CVSS 8.2). 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 contro

Q: How urgent is CVE-2026-29046?

Priority 47/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 8.2REMOTEUPGRADE

CVE-2026-29046 is a high-severity flaw (CVSS 8.2) affecting tinyweb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 b

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-20, CWE-74, CWE-93, CWE-114
Published	2026-03-06
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: ritlabs

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-06 04:16 UTCPublished CVE record published
2026-06-17 10:29 UTCUpdated Record last modified

ritlabs tinyweb UPGRADE

Affected: < 2.04

Fixed in: 2.04

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy tinyweb || rpm -q tinyweb || tinyweb --version

2. UPGRADE to 2.04 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tinyweb

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tinyweb

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-29046?

tinyweb: upgrade to 2.04. Exact commands for each OS are on this page.

Is CVE-2026-29046 being exploited?

CVE-2026-29046 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-29046 affect?

CVE-2026-29046 affects tinyweb. Severity is high (CVSS 8.2). 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 contro

How urgent is CVE-2026-29046?

Priority 47/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-28497 CRITICAL 9.1 UPGRADE TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32
CVE-2026-27633 HIGH 7.5 UPGRADE TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32
CVE-2026-27630 HIGH 7.5 UPGRADE TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32
CVE-2026-27613 CRITICAL 9.8 UPGRADE TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32
CVE-2026-22781 CRITICAL 9.8 UPGRADE TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32

References

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