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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

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

No history.

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

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