Vulnerability · Published Apr 22, 2026 · Assigned by canonical
CVE-2026-35379uutils coreutils tr Local Logic Error and Data Integrity Issue in Character Class Handling
Low 3.3
In plain English
A low-severity security flaw in coreutils from Uutils. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | rust-coreutils | no fix listed | DEBIAN-CVE-2026-35379 |
| Debian:13 | rust-coreutils | no fix listed | DEBIAN-CVE-2026-35379 |
| Debian:14 | rust-coreutils | 0.8.0-1 | DEBIAN-CVE-2026-35379 |
| Ubuntu:24.04:LTS | rust-coreutils | no fix listed | UBUNTU-CVE-2026-35379 |
| Ubuntu:25.10 | rust-coreutils | no fix listed | UBUNTU-CVE-2026-35379 |
Affected products (as reported)
Weakness: CWE-684 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
References
- https://github.com/uutils/coreutils/pull/11405 issue-tracking, patch
- https://github.com/uutils/coreutils/releases/tag/0.8.0 vendor-advisory