Arbitrary file upload in Gnu Tar
CVE-2026-5704
A flaw was found in tar. A remote attacker could exploit this vulnerability by crafting a malicious archive, leading to hidden file injection with fully attacker-controlled content. This bypasses pre-extraction inspection mechanisms, poten…
Vulnerability class: Unrestricted File Upload
EPSS: 0.004 (29.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N.
Affected products
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, Third Party Advisory, vdb-entry)
- RHBZ#2455360 (x_refsource_REDHAT, issue-tracking, Exploit, Third Party Advisory, Issue Tracking)
- af854a3a-2127-422b-91ae-364da2661108 (Exploit, Mailing List, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Exploit, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-5704?
- CVE-2026-5704 is a medium-severity vulnerability in Gnu Tar, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 5.0/10. Published 2026-04-06.
- How severe is CVE-2026-5704?
- Medium severity. CVSS v3 base score is 5.0 out of 10.