CVE-2026-35346
Duplicate Advisory: coreutils' comm utility silently corrupts data by performing lossy UTF-8 conversion on all output lines
Description
The comm utility in uutils coreutils silently corrupts data by performing lossy UTF-8 conversion on all output lines. The implementation uses String::from_utf8_lossy(), which replaces invalid UTF-8 byte sequences with the Unicode replacement character (U+FFFD). This behavior differs from GNU comm, which processes raw bytes and preserves the original input. This results in corrupted output when the utility is used to compare binary files or files using non-UTF-8 legacy encodings.
How to fix CVE-2026-35346
To remediate CVE-2026-35346, upgrade the affected package to a fixed version below.
- —upgrade to 0.6.0 or later
- —upgrade to 0.6.0 or later
Is CVE-2026-35346 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 0.6.0
- from 0, < 0.6.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW3.3 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |