CVE-2026-35380: uutils coreutils cut Local Logic Error and Data Integrity Issue in Delimiter Parsing

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-04-22 · updated 2026-10-26
Weakness: CWE-20

Description

A logic error in the cut utility of uutils coreutils causes the program to incorrectly interpret the literal two-byte string '' (two single quotes) as an empty delimiter. The implementation mistakenly maps this string to the NUL character for both the -d (delimiter) and --output-delimiter options. This vulnerability can lead to silent data corruption or logic errors in automated scripts and data pipelines that process strings containing these characters, as the utility may unintentionally split or join data on NUL bytes rather than the intended literal characters.

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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