CVE-2026-33056

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-33056
tar-rs is a tar archive reading/writing library for Rust. In versions 0.4.44 and below, when unpacking a tar archive, the tar crate's unpack_dir function uses fs::metadata() to check whether a path that already exists is a directory. Because fs::metadata() follows symbolic links, a crafted tarball containing a symlink entry followed by a directory entry with the same name causes the crate to treat the symlink target as a valid existing directory — and subsequently apply chmod to it. This allows an attacker to modify the permissions of arbitrary directories outside the extraction root. This issue has been fixed in version 0.4.45.

6.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://github.com/alexcrichton/tar-rs/commit/17b1fd84e632071cb8eef9d3709bf347bd266446 Patch
https://github.com/alexcrichton/tar-rs/security/advisories/GHSA-j4xf-2g29-59ph Mitigation Vendor Advisory Exploit
Configurations

Configuration 1 (hide)

cpe:2.3:a:tar_project:tar:*:*:*:*:*:rust:*:*
History

24 Mar 2026, 16:17

Type Values Removed Values Added
CPE cpe:2.3:a:tar_project:tar:*:*:*:*:*:rust:*:*
Summary
  • (es) tar-rs es una biblioteca de lectura/escritura de archivos tar para Rust. En las versiones 0.4.44 e inferiores, al desempaquetar un archivo tar, la función `unpack_dir` del crate `tar` utiliza `fs::metadata()` para verificar si una ruta que ya existe es un directorio. Debido a que `fs::metadata()` sigue los enlaces simbólicos, un tarball manipulado que contiene una entrada de enlace simbólico seguida de una entrada de directorio con el mismo nombre hace que el crate trate el destino del enlace simbólico como un directorio existente válido y, posteriormente, le aplique `chmod`. Esto permite a un atacante modificar los permisos de directorios arbitrarios fuera de la raíz de extracción. Este problema ha sido solucionado en la versión 0.4.45.
References () https://github.com/alexcrichton/tar-rs/commit/17b1fd84e632071cb8eef9d3709bf347bd266446 - () https://github.com/alexcrichton/tar-rs/commit/17b1fd84e632071cb8eef9d3709bf347bd266446 - Patch
References () https://github.com/alexcrichton/tar-rs/security/advisories/GHSA-j4xf-2g29-59ph - () https://github.com/alexcrichton/tar-rs/security/advisories/GHSA-j4xf-2g29-59ph - Mitigation, Vendor Advisory, Exploit
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 6.5
First Time Tar Project tar
Tar Project

20 Mar 2026, 08:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-20 08:16

Updated : 2026-03-24 16:17

NVD link : CVE-2026-33056

Mitre link : CVE-2026-33056

CVE.ORG link : CVE-2026-33056

JSON object : View

Products Affected

tar_project

  • tar
CWE
CWE-61

UNIX Symbolic Link (Symlink) Following