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CVE-2026-35366 Detail

Description

The printenv utility in uutils coreutils fails to display environment variables containing invalid UTF-8 byte sequences. While POSIX permits arbitrary bytes in environment strings, the uutils implementation silently skips these entries rather than printing the raw bytes. This vulnerability allows malicious environment variables (e.g., adversarial LD_PRELOAD values) to evade inspection by administrators or security auditing tools, potentially allowing library injection or other environment-based attacks to go undetected.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/uutils/coreutils/issues/9701 CISA-ADP, Canonical Ltd.
https://github.com/uutils/coreutils/pull/9728 Canonical Ltd.
https://github.com/uutils/coreutils/releases/tag/0.6.0 Canonical Ltd.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-754 Improper Check for Unusual or Exceptional Conditions Canonical Ltd.  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-35366
NVD Published Date:
04/22/2026
NVD Last Modified:
04/22/2026
Source:
Canonical Ltd.