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CVE-2026-33056

tar-rs: tar-rs: Arbitrary directory permission modification via crafted tar archive

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Severity

Moderate

Red Hat Product Security

4.4

CVSS 3.1

Review impact separately from score.

Published · March 20, 2026

Updated · November 1, 2026

Description

A flaw was found in tar-rs, a Rust library for reading and writing tar archives. When unpacking a crafted tar archive, an attacker can exploit a symbolic link vulnerability. By including a symlink followed by a directory with the same name, the library incorrectly applies file permissions to the symlink's target. This allows an attacker to modify the permissions of arbitrary directories outside the intended extraction location.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

CVSS / CWE

CVSS 3.1 · 4.4
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CWE-59 · Improper Link Resolution Before File Access