CVE-2026-70622

tar-rs versions 0.4.11 through 0.4.46 contain a symlink escape vulnerability in the Builder::append_dir_all() function that allows attackers to read files outside the intended source root directory by planting symlinks in an attacker-controlled directory. When a privileged process archives an untrusted directory, the function follows symlinks without verifying that resolved targets remain within the source root, causing out-of-bounds files to be included in the archive as regular files and disclosed to the attacker.

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 LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://gist.github.com/thesmartshadow/e7dac0bb690ee17b9cc142154cb11726
https://www.vulncheck.com/advisories/tar-rs-symlink-escape-via-append-dir-all

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-10 18:18

Updated : 2026-08-11 03:18

NVD link : CVE-2026-70622

Mitre link : CVE-2026-70622

CVE.ORG link : CVE-2026-70622

JSON object : View

Products Affected

No product.

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

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