Vulnerability in Uutils Coreutils
CVE-2026-35346
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (6.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 6.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: -0.000
Affected products
- Uutils Coreutils — versions 0
Weakness classification (CWE)
References
- github.com/uutils/coreutils/pull/10206 (Patch, patch, Issue Tracking)
- github.com/uutils/coreutils/issues/10192 (issue-tracking, Exploit, Issue Tracking, Vendor Advisory)
- github.com/uutils/coreutils/releases/tag/0.6.0 (vendor-advisory, Release Notes)
Frequently asked questions
- What is CVE-2026-35346?
- CVE-2026-35346 is a low-severity vulnerability in Uutils Coreutils, classified under CWE-176. CVSS score: 3.3/10. Published 2026-04-22.
- How severe is CVE-2026-35346?
- Low severity. CVSS v3 base score is 3.3 out of 10.