CVE-2026-35346The comm utility in uutils coreutils silently corrupts data by performing lossy UTF-8 conversion on all output lines.
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No exploitation reported and no EPSS estimate yet.
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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, NVD)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
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
uutils coreutils uutils:coreutils | before 0.6.0 | NVD |
References
- https://github.com/uutils/coreutils/issues/10192exploit, issue-tracking, vendor-advisory
- https://github.com/uutils/coreutils/pull/10206issue-tracking, patch
- https://github.com/uutils/coreutils/releases/tag/0.6.0release-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.