CVE-2026-35357 — MEDIUM (4.7)

Vulnerability Description

The cp utility in uutils coreutils is vulnerable to an information disclosure race condition. Destination files are initially created with umask-derived permissions (e.g., 0644) before being restricted to their final mode (e.g., 0600) later in the process. A local attacker can race to open the file during this window; once obtained, the file descriptor remains valid and readable even after the permissions are tightened, exposing sensitive or private file contents.

CVSS Score

4.7

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Uutils	Coreutils	-

Related Weaknesses (CWE)

CWE-367

References

https://github.com/uutils/coreutils/issues/10011ExploitIssue TrackingVendor Advisory
https://github.com/uutils/coreutils/issues/10011ExploitIssue TrackingVendor Advisory

FAQ

What is CVE-2026-35357?

CVE-2026-35357 is a vulnerability with a CVSS score of 4.7 (MEDIUM). The cp utility in uutils coreutils is vulnerable to an information disclosure race condition. Destination files are initially created with umask-derived permissions (e.g., 0644) before being restricte...

How severe is CVE-2026-35357?

CVE-2026-35357 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-35357?

Check the references section above for vendor advisories and patch information. Affected products include: Uutils Coreutils.