uutils coreutils printenv Security Inspection Bypass via UTF-8 Enforcement
Published Apr 22, 2026
4.4
MEDIUMCVSS 3.1
EPSS 0.19%
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.
Affected products
-
- Version 0StatusaffectedConstraints<0.6.0
- Version
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Apr 22, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
Apr–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.19% (0.00191) | 7.89th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.17% (0.00170) | 6.61th | v5 (v2026.06.15) |
| Apr 23, 2026 | 0.01% (0.00011) | 1.43th | v4 (v2025.03.14) |
References (7)
- https://github.com/advisories/GHSA-p7h3-7q52-72w8 Advisory
- https://github.com/uutils/coreutils/commit/0bfbbc00c7895c0fb6ea94987b4aab99e3d7ee52
- https://github.com/uutils/coreutils/issues/9701 exploitissue-trackingIssue Tracking
- https://github.com/uutils/coreutils/pull/9728 patchIssue Tracking
- https://github.com/uutils/coreutils/releases/tag/0.6.0 vendor-advisoryRelease Notes
- https://github.com/uutils/coreutils/security/advisories/GHSA-p7h3-7q52-72w8
- https://nvd.nist.gov/vuln/detail/CVE-2026-35366
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-p7h3-7q52-72w8 | Advisory | |
| https://github.com/uutils/coreutils/commit/0bfbbc00c7895c0fb6ea94987b4aab99e3d7ee52 | ||
| https://github.com/uutils/coreutils/issues/9701 | exploitissue-trackingIssue Tracking | |
| https://github.com/uutils/coreutils/pull/9728 | patchIssue Tracking | |
| https://github.com/uutils/coreutils/releases/tag/0.6.0 | vendor-advisoryRelease Notes | |
| https://github.com/uutils/coreutils/security/advisories/GHSA-p7h3-7q52-72w8 | ||
| https://nvd.nist.gov/vuln/detail/CVE-2026-35366 |
Change history (0)
No recorded changes yet.