Low 3.3Published Apr 22, 2026

CVE-2026-35346uutils coreutils comm Silent Data Corruption via Lossy UTF-8 Normalization

Updated under an hour ago (Oct 26, 2026, 11:50 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for Uutils coreutils

Exploited in the last 30 days

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.

CVSS: 3.3 LOW (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-176
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: canonical
NVD analysis: Analyzed
Record last updated: Apr 22, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Uutils coreutils uutils:coreutils (from the name)	before 0.6.0	CNA record
uutils coreutils uutils:coreutils	before 0.6.0	NVD

References

References

https://github.com/uutils/coreutils/pull/10206	patch, issue-tracking
https://github.com/uutils/coreutils/issues/10192	issue-tracking, exploit, vendor-advisory
https://github.com/uutils/coreutils/releases/tag/0.6.0	vendor-advisory, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.