CVE-2026-35379: uutils coreutils tr Local Logic Error and Data Integrity Issue in Character Class Handling

Severity: low (CVSS 3.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-04-22 · updated 2026-10-26
Weakness: CWE-684

Description

A logic error in the tr utility of uutils coreutils causes the program to incorrectly define the [:graph:] and [:print:] character classes. The implementation mistakenly includes the ASCII space character (0x20) in the [:graph:] class and excludes it from the [:print:] class, effectively reversing the standard behavior established by POSIX and GNU coreutils. This vulnerability leads to unintended data modification or loss when the utility is used in automated scripts or data-cleaning pipelines that rely on standard character class semantics. For example, a command executed to delete all graphical characters while intending to preserve whitespace will incorrectly delete all ASCII spaces, potentially resulting in data corruption or logic failures in downstream processing.

Affected products

Uutils coreutils: before 0.8.0 — fixed in 0.8.0

How to fix

Upgrade to a fixed version: Uutils coreutils 0.8.0. Check the vendor advisory for mitigations.

References

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