What is CVE-2026-70622?

CVE-2026-70622 is a medium-severity vulnerability in Composefs Tar-rs, classified under Improper Link Resolution Before File Access. CVSS score: 6.5/10. Published 2026-08-10.

How severe is CVE-2026-70622?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Composefs Tar-rs

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-contr…

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Composefs Tar-rs — versions 0.4.11

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-70622?: CVE-2026-70622 is a medium-severity vulnerability in Composefs Tar-rs, classified under Improper Link Resolution Before File Access. CVSS score: 6.5/10. Published 2026-08-10.
How severe is CVE-2026-70622?: Medium severity. CVSS v3 base score is 6.5 out of 10.