CVE-2026-27633: TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32

Q: How do I fix CVE-2026-27633?

tinyweb: upgrade to 2.02. Exact commands for each OS are on this page.

Q: Is CVE-2026-27633 being exploited?

CVE-2026-27633 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-2026-27633 affect?

CVE-2026-27633 affects tinyweb. Severity is high (CVSS 7.5). TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32. Versions prior to version 2.02 have a Denial of Service (DoS) vulnerability via memory exhaustion. Unauthenticated remote attackers can send an HTTP POST request to the serv

Q: How urgent is CVE-2026-27633?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2026-27633 is a high-severity flaw (CVSS 7.5) 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. Versions prior to version 2.02 have a Denial of Service (DoS) vulnerability via memory exhaustion. Unauthenticated remote attackers can send an HTTP POST request to the server with an exceptionally large `Content-Length` header (e.g., `2147483647`). The server continuously allocates memory for the request body (`EntityBody`) while streaming the payload without enforcing any maximu

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-400, CWE-770
Published	2026-02-26
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

2026-02-26 00:16 UTCPublished CVE record published
2026-06-17 10:27 UTCUpdated Record last modified

ritlabs tinyweb UPGRADE

Affected: < 2.02

Fixed in: 2.02

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2.02 (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-2026-27633?

tinyweb: upgrade to 2.02. Exact commands for each OS are on this page.

Is CVE-2026-27633 being exploited?

CVE-2026-27633 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-2026-27633 affect?

CVE-2026-27633 affects tinyweb. Severity is high (CVSS 7.5). TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32. Versions prior to version 2.02 have a Denial of Service (DoS) vulnerability via memory exhaustion. Unauthenticated remote attackers can send an HTTP POST request to the serv

How urgent is CVE-2026-27633?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-29046 HIGH 8.2 UPGRADE TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32
CVE-2026-28497 CRITICAL 9.1 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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