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VulnerabilityPublished

CVE-2026-35346: Uutils coreutils · Improper Handling of Unicode Encoding

Affects Uutils coreutilsSource CVE Database V5

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Not known to be exploited · CVSS 3.3 Low : upgrade to 0.6.0 when convenient.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
3.3Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.6.0
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade Uutils coreutils to 0.6.0.

Affected software

ProductAffectedFixed in
UutilscoreutilsAffected
  • <0.6.0
Fixed in
  • 0.6.0
GitHubuutils/coreutilspkg:github/uutils/coreutilsOther threatsAffected
  • =0
Fixed in–
GitHubcoreutilspkg:github/coreutilsOther threatsAffected
  • <0.6.0
Fixed in
  • 0.6.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, users should avoid using uutils coreutils comm utility for comparing binary or non-UTF-8 encoded files or use GNU comm as an alternative.

Description

The comm utility in uutils coreutils improperly handles Unicode encoding by performing lossy UTF-8 conversion on all output lines. This causes silent data corruption when comparing binary files or files with non-UTF-8 encodings, as invalid UTF-8 sequences are replaced with the Unicode replacement character. This behavior differs from GNU comm, which preserves raw byte data. The vulnerability has a low severity score and no known exploits in the wild.

References

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