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Vulnerabilities

Vulnerability · CVE-2026-27613

TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32.

Published Feb 25, 2026 · catalog updated Jun 17, 2026 · TinyWeb is a web

Check if you run it

No confirmed exploitation is on record for CVE-2026-27613. EPSS is 1.40%. Act only if a listed version of TinyWeb is a web is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (TinyWeb is a web).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical10.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.40%
Remediation
Advisory link
Affected products
cpe ritlabs/tinyweb

TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32. A vulnerability in versions prior to 2.01 allows unauthenticated remote attackers to bypass the web server's CGI parameter security controls. Depending on the server configuration and the specific CGI executable in use, the impact is either source code disclosure or remote code execution (RCE). Anyone hosting CGI scripts (particularly interpreted languages like PHP) using vulnerable versions of TinyWeb is impacted. The problem has been patched in version 2.01. If upgrading is not immediately possible, ensure is enabled (it is defined by default in ) and/or do not use CGI executables that natively accept dangerous command-line flags (such as ). If hosting PHP, consider placing the server behind a Web Application Firewall (WAF) that explicitly blocks URL query string parameters that begin with a hyphen ( ) or contain encoded double quotes ( ).

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe ritlabs/tinywebversion unspecified

How to fix CVE-2026-27613

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-27613. EPSS is 1.40%. Act only if a listed version of TinyWeb is a web is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-78: OS Command Injection; CWE-88. EPSS 1.40%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Windows security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 25, 2026 · NIST NVD

    Detected

    TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32. A vulnerability in versions prior to 2.01 allows unauthenticated remote attackers to bypass the web server's CGI parameter security controls. Depending on the server configuration and the specific CGI executable in use, the impact is either source code disclosure or remote code execution (RCE). Anyone hosting CGI scripts (particula

  2. Jun 17, 2026 · NIST NVD

    Updated

    TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32. A vulnerability in versions prior to 2.01 allows unauthenticated remote attackers to bypass the web server's CGI parameter security controls. Depending on the server configuration and the specific CGI executable in use, the impact is either source code disclosure or remote code execution (RCE). Anyone hosting CGI scripts (particula

Sources

  • CVE.orgVulnerability recordCVE-2026-27613

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-27613

    30-day exploitation probability 1.4%

    first.org
  • NIST NVDVulnerability recordCVE-2026-27613

    TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32. A vulnerability in versions prior to 2.01 allows unauthenticated remote attackers to bypass the web server's CGI parameter security controls. Depending on the server configuration and the specific CGI executable i

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.