PatchTheCVECVE-2026-35342: The mktemp utility in uutils coreutils fails to properly handle an empty TMPDIR environment variable
CVE-2026-35342 is a low-severity flaw (CVSS 3.3) affecting coreutils. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 3.3 (Low) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.1% (top 97%) |
| CISA exploited list | No |
| Weakness | CWE-377 |
| Published | 2026-04-22 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-35342?
coreutils: upgrade to 0.6.0. Exact commands for each OS are on this page.
Is CVE-2026-35342 being exploited?
CVE-2026-35342 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-35342 affect?
CVE-2026-35342 affects coreutils. Severity is low (CVSS 3.3). 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 p
How urgent is CVE-2026-35342?
Priority 12/100. No elevated risk signals yet.
Related CVEs
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