Vulnerability · Published Apr 22, 2026 · Assigned by canonical
CVE-2026-35380uutils coreutils cut Local Logic Error and Data Integrity Issue in Delimiter Parsing
Medium 5.5
In plain English
A medium-severity improper input validation in coreutils from Uutils. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | rust-coreutils | no fix listed | DEBIAN-CVE-2026-35380 |
| Debian:13 | rust-coreutils | no fix listed | DEBIAN-CVE-2026-35380 |
| Debian:14 | rust-coreutils | 0.8.0-1 | DEBIAN-CVE-2026-35380 |
| Ubuntu:24.04:LTS | rust-coreutils | no fix listed | UBUNTU-CVE-2026-35380 |
| Ubuntu:25.10 | rust-coreutils | no fix listed | UBUNTU-CVE-2026-35380 |
Affected products (as reported)
Weakness: CWE-20 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
References
- https://github.com/uutils/coreutils/pull/11399 issue-tracking, patch
- https://github.com/uutils/coreutils/releases/tag/0.8.0 vendor-advisory