CVE-2026-39977

Katalog CVE

CVSS 6.3 · Medium EPSS 0,38%

Kerentanan Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') pada flatpak-builder. Skor CVSS 3.1 6.3 (Medium) menurut NVD.

Deskripsi (NVD)

flatpak-builder is a tool to build flatpaks from source. From 1.4.5 to before 1.4.8, the license-files manifest key takes an array of paths to user defined licence files relative to the source directory of the module. The paths from that array are resolved using g_file_resolve_relative_path() and validated to stay inside the source directory using two checks - g_file_get_relative_path() which does not resolve symlinks and g_file_query_file_type() with G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS which only applies to the final path component. The copy operation runs on host. This can be exploited by using a crafted manifest and/or source to read arbitrary files from the host and capture them into the build output. This vulnerability is fixed in 1.4.8.

Rincian

Terbit di NVD

9 April 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

6.3 (Medium), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

EPSS (30 hari)

0,38% peluang dieksploitasi; lebih tinggi dari 30,0% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/flatpak/flatpak-builder/security/advisories/GHSA-6gm9-3g7m-3965 exploit · advisory vendor