CVE-2026-35379Public exploit

Data corruption via reversed character-class mapping

Published Apr 22, 2026 · Updated Apr 22, 2026

Incorrect character-class handling in uutils coreutils before 0.8.0 allows local users to corrupt data through the tr utility. The tr class mapping assigns ASCII space to [:graph:] and omits it from [:print:], reversing POSIX and GNU filtering semantics. Exploitation requires a local invocation or script that relies on those classes; affected filters silently handle spaces incorrectly and can corrupt downstream data.

CVSS severity3.3
Low
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Incorrect character-class handling in uutils coreutils before 0.8.0 allows local users to corrupt data through the tr utility. The tr class mapping assigns ASCII space to [:graph:] and omits it from [:print:], reversing POSIX and GNU filtering semantics. Exploitation requires a local invocation or script that relies on those classes; affected filters silently handle spaces incorrectly and can corrupt downstream data.

The record

CVE
CVE-2026-35379
Published
Apr 22, 2026
Updated
Apr 22, 2026
Vendor
uutils
Product
coreutils
Classifications
CWE-684, T1565
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.8.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

uutils · coreutilsversion=0 <0.8.0

Published CVSS scores

3.3Canonical Ltd.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-684Incorrect Provision of Specified Functionality
T1565Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo