CVE-2026-35342 | THREATINT

Description

The mktemp utility in uutils coreutils fails to properly handle an empty TMPDIR environment variable. Unlike GNU mktemp, which falls back to /tmp when TMPDIR is an empty string, the uutils implementation treats the empty string as a valid path. This causes temporary files to be created in the current working directory (CWD) instead of the intended secure temporary directory. If the CWD is more permissive or accessible to other users than /tmp, it may lead to unintended information disclosure or unauthorized access to temporary data.

PUBLISHED Reserved 2026-04-02 | Published 2026-04-22 | Updated 2026-04-22 | Assigner canonical

LOW: 3.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Problem types

CWE-377: Insecure Temporary File

Product status

Default status

unaffected

Any version before 0.6.0

affected

Credits

Zellic finder

References

github.com/uutils/coreutils/pull/10566 patch issue-tracking

github.com/uutils/coreutils/releases/tag/0.6.0 vendor-advisory

cve.org (CVE-2026-35342)

nvd.nist.gov (CVE-2026-35342)

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