CVE-2026-27699

🎯 CVE-2026-27699 🧪 PoC 🇪🇺 EUVD

💬 0 Diskussion 📄 .md Alle CVEs anzeigen ✕

CVE-2026-27699 | The `basic-ftp` FTP client library for Node.js contains a path traversal vulnerability (CWE-22) in versions prior to 5.2.0 in the `downloadToDir()` method. A malicious FTP server can send directory listings with filenames containing path traversal sequences (`../`) that cause files to be written outside the intended download directory. Version 5.2.0 patches the issue.

The `basic-ftp` FTP client library for Node.js contains a path traversal vulnerability (CWE-22) in versions prior to 5.2.0 in the `downloadToDir()` method. A malicious FTP server can send directory listings with filenames containing path traversal sequences (`../`) that cause files to be written outside the intended download directory. Version 5.2.0 patches the issue.

Klassifikation & Betroffenheit:

CWE-22 patrickjuchli basic-ftp < 5.2.0patrickjuchli basic-ftp *

Improper Limitation of a Pathname to a Restricted Directory 🎯 High

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

🛡️ Empfohlene Mitigation: Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does. When performing input validation, consider all …

Vollständige Definition bei MITRE ➔

⚔️ Typische Angriffsmuster (CAPEC):

CAPEC-64 · Using Slashes and URL Encoding Combined … (High) CAPEC-76 · Manipulating Web Input to File System Ca… (Very High) CAPEC-78 · Using Escaped Slashes in Alternate Encod… (High) CAPEC-79 · Using Slashes in Alternate Encoding (High) CAPEC-126 · Path Traversal (Very High)

🧩 Ähnliche Schwachstellen (Hersteller/Klasse/Score-Band):

CVE-2026-55393 10.0 CVE-2026-97163 10.0 CVE-2026-80155 10.0 CVE-2026-70200 10.0 CVE-2026-85706 10.0

🩹 Patch verfügbar (OSV):

🩹 5d41e45073ed1a8a3b5e5a1bbfcd131e61295bf8 (Commit) 🩹 2a2a0e6514357b9eda07c2f8afbd3f04727a7cd9 (Commit)

🇩🇪 BSI-Sicherheitshinweise: BSI · hoch · IBM Concert: Mehrere Schwachstellen ↗

📚 Referenzen & Quellen:

🇪🇺 Original-Eintrag (ENISA EUVD) 🇺🇸 NVD-Eintrag

Ausnutzungs-Zeitleiste:

Reserviert 2026

Veröffentlicht 02/2026

Heute 02.11.

CVSS-Vektor-Analyse: 9.1

AV · Angriffsvektor Netzwerk

AC · Komplexität Gering

PR · Privilegien Keine

UI · Interaktion Keine

S · Scope Unverändert

C · Vertraulichkeit Keine

I · Integrität Hoch

A · Verfügbarkeit Hoch

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

CNA-Bewertung (GitHub_M): 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Veröffentlicht:25.02.2026

Aktualisiert:17.06.2026 10:27

Assigner (CNA):GitHub_M

EUVD-ID:EUVD-2026-8643

Quellen: 🇪🇺 EUVD-Datenbank (ENISA) + 🇺🇸 NVD-Anreicherung · 24-h-Cache

CWE-22 ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

Tier	CVEs	Anteil
≥90 %	755	0,2 %
≥50 %	3.336	0,9 %
≥10 %	22.172	5,7 %
<10 %	362.847	93,3 %

9.1 CRITICAL

EPSS

0.9%

CVE-2026-27699 🌐 Netzwerk (Remote) 🔓 Keine Authentifizierung nötig

patrickjuchli

CVE-2026-27699 | The `basic-ftp` FTP client library for Node.js contains a path traversal vulnerability (CWE-22) in versions prior to 5.2.0 in the `downloadToDir()` method. A malicious FTP server can send directory listings with filenames containing path traversal sequences (`../`) that cause files to be written outside the intended download directory. Version 5.2.0 patches the issue.

CWE-22 ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

vor 8 Monaten ↻ vor 8 Monaten

🛡️ Details ➔

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