CVE-2026-35366 Details
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.
A vulnerability exists in the printenv utility of uutils coreutils, specifically in version 0.6.0, regarding its handling of environment variables with invalid UTF-8 byte sequences. While POSIX allows arbitrary bytes in environment strings, the uutils coreutils implementation omits these variables without notification. This behavior can prevent malicious environment variables, such as harmful LD_PRELOAD values, from being detected by administrators or security auditing tools, potentially facilitating undetected library injection or other environment-based attacks.
Users can update to uutils coreutils version 0.6.0, which includes a fix for this issue. The updated version can be downloaded from the uutils coreutils GitHub releases page.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 22, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/uutils/coreutils/issues/9701 | CISA-ADP | ExploitIssue Tracking |
| https://github.com/uutils/coreutils/issues/9701 | [email protected] | ExploitIssue Tracking |
| https://github.com/uutils/coreutils/pull/9728 | [email protected] | Issue TrackingPatch |
| https://github.com/uutils/coreutils/releases/tag/0.6.0 | [email protected] | Release Notes |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-754 | Improper Check for Unusual or Exceptional Conditions | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| uutils coreutils | < 0.6.0 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 4, 2026 | Initial Analysis | [email protected] |
| Apr 22, 2026 | CVE Modified | CISA-ADP |
| Apr 22, 2026 | New CVE Received | [email protected] |