CVE-2026-27613

{"id": "CVE-2026-27613", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 10.0, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2026-02-25T23:16:21.743", "references": [{"url": "https://github.com/maximmasiutin/TinyWeb/commit/d9dbda8db49da69d2160e1c527e782b73b5ffb6b", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/maximmasiutin/TinyWeb/releases/tag/v2.01", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/maximmasiutin/TinyWeb/security/advisories/GHSA-rfx5-fh9m-9jj9", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://www.masiutin.net/tinyweb-cve-2026-27613.html", "tags": ["Third Party Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-78"}, {"lang": "en", "value": "CWE-88"}]}], "descriptions": [{"lang": "en", "value": "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 `STRICT_CGI_PARAMS` is enabled (it is defined by default in `define.inc`) and/or do not use CGI executables that natively accept dangerous command-line flags (such as `php-cgi.exe`). 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 (`%22`)."}, {"lang": "es", "value": "TinyWeb es un servidor web (HTTP, HTTPS) escrito en Delphi para Win32. Una vulnerabilidad en versiones anteriores a la 2.01 permite a atacantes remotos no autenticados eludir los controles de seguridad de par\u00e1metros CGI del servidor web. Dependiendo de la configuraci\u00f3n del servidor y del ejecutable CGI espec\u00edfico en uso, el impacto es la divulgaci\u00f3n de c\u00f3digo fuente o la ejecuci\u00f3n remota de c\u00f3digo (RCE). Cualquiera que aloje scripts CGI (particularmente lenguajes interpretados como PHP) usando versiones vulnerables de TinyWeb est\u00e1 afectado. El problema ha sido parcheado en la versi\u00f3n 2.01. Si la actualizaci\u00f3n no es posible de inmediato, aseg\u00farese de que `STRICT_CGI_PARAMS` est\u00e9 habilitado (est\u00e1 definido por defecto en `define.inc`) y/o no utilice ejecutables CGI que acepten de forma nativa indicadores de l\u00ednea de comandos peligrosos (como `php-cgi.exe`). Si aloja PHP, considere colocar el servidor detr\u00e1s de un cortafuegos de aplicaciones web (WAF) que bloquee expl\u00edcitamente los par\u00e1metros de cadena de consulta de URL que comienzan con un guion (`-`) o contienen comillas dobles codificadas (`%22`)."}], "lastModified": "2026-03-04T03:21:58.263", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:ritlabs:tinyweb:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B119C41C-4D84-41B3-8797-7DAD79FCF822", "versionEndExcluding": "2.01"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}