CVE-2026-5704
Low
No strong exploitation signal.
CVSS base
5.0
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N
EPSS — probability of exploitation (30 days)
0.4%
34.1th percentile
CISA KEV
Not listed
Weakness / dates
CWE-434
Published 2026-04-06 · modified 2026-09-10
CVSS breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N
| Attack Vector | L | Local |
| Attack Complexity | L | Low |
| Privileges Required | L | Low |
| User Interaction | R | Required |
| Scope | U | Unchanged |
| Confidentiality | N | None |
| Integrity | H | High |
| Availability | N | None |
Timeline
- 2026-04-06 — Published (NVD)
- 2026-09-10 — Last modified (NVD)
Description
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, potentially allowing an attacker to introduce malicious files onto a system without detection.
Affected
References
- https://access.redhat.com/errata/RHSA-2026:61581
- https://access.redhat.com/errata/RHSA-2026:61586
- https://access.redhat.com/errata/RHSA-2026:61783
- https://access.redhat.com/errata/RHSA-2026:66018
- https://access.redhat.com/errata/RHSA-2026:66514
- https://access.redhat.com/security/cve/CVE-2026-5704
- exploit https://bugzilla.redhat.com/show_bug.cgi?id=2455360
- exploit http://www.openwall.com/lists/oss-security/2026/04/11/10
- http://www.openwall.com/lists/oss-security/2026/04/11/11
- exploit http://www.openwall.com/lists/oss-security/2026/04/12/2