CVE-2026-35342
Estado: AnalizadaBaja (3.3)—
The mktemp utility in uutils coreutils fails to properly handle an empty TMPDIR environment variable. Unlike GNU mktemp, which falls back to /tmp when TMPDIR is an empty string, the uutils implementation treats the empty string as a valid path. This causes temporary files to be created in the current working directory (CWD) instead of the intended secure temporary directory. If the CWD is more permissive or accessible to other users than /tmp, it may lead to unintended information disclosure or unauthorized access to temporary data.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Puntuación base: 3.3
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.15%
- Percentil entre todas las CVEs puntuadas: 4
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-377
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-35342",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-35342",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-04-22T18:15:42.831357Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "security@ubuntu.com",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 3.3,
"attackVector": "LOCAL",
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "LOW",
"confidentialityImpact": "LOW"
},
"impactScore": 1.4,
"exploitabilityScore": 1.8
}
]
},
"affected": [
{
"source": "security@ubuntu.com",
"affectedData": [
{
"repo": "https://github.com/uutils/coreutils",
"vendor": "Uutils",
"product": "coreutils",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "0.6.0",
"versionType": "semver"
}
],
"platforms": [
"Linux",
"Unix",
"macOS"
],
"packageName": "coreutils",
"collectionURL": "https://github.com/uutils",
"defaultStatus": "unaffected"
}
]
}
],
"published": "2026-04-22T17:16:36.217",
"references": [
{
"url": "https://github.com/uutils/coreutils/pull/10566",
"tags": [
"Issue Tracking",
"Patch"
],
"source": "security@ubuntu.com"
},
{
"url": "https://github.com/uutils/coreutils/releases/tag/0.6.0",
"tags": [
"Release Notes"
],
"source": "security@ubuntu.com"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Secondary",
"source": "security@ubuntu.com",
"description": [
{
"lang": "en",
"value": "CWE-377"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "The mktemp utility in uutils coreutils fails to properly handle an empty TMPDIR environment variable. Unlike GNU mktemp, which falls back to /tmp when TMPDIR is an empty string, the uutils implementation treats the empty string as a valid path. This causes temporary files to be created in the current working directory (CWD) instead of the intended secure temporary directory. If the CWD is more permissive or accessible to other users than /tmp, it may lead to unintended information disclosure or unauthorized access to temporary data."
}
],
"lastModified": "2026-06-17T10:40:25.610",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:uutils:coreutils:*:*:*:*:*:rust:*:*",
"vulnerable": true,
"matchCriteriaId": "87C33018-2E08-45B0-B69C-7FC224F7F883",
"versionEndExcluding": "0.6.0"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "security@ubuntu.com"
}