ubuntu-cve-2026-49982
Vulnerability from osv_ubuntu
Published
2026-06-11 17:16
Modified
2026-06-17 04:30
Summary
Details
tmp is a temporary file and directory creator for node.js. In version 0.2.6, the _assertPath guard added to tmp rejects only string values that contain the substring ... It is bypassed when prefix, postfix, or template is supplied as a non-string value (Array, Buffer, or any object) whose includes('..') returns falsy but whose stringification still contains ../. The value flows through Array.prototype.join/String coercion inside _generateTmpName and path.join(tmpDir, opts.dir, name), producing a final path that escapes tmpdir and creates a file or directory at an attacker-controlled location with the host process's privileges. This affects any application that forwards untrusted request data (a common pattern is JSON body fields or qs-parsed bracket-array query strings such as ?prefix[]=...) into tmp.file, tmp.fileSync, tmp.dir, tmp.dirSync, tmp.tmpName, or tmp.tmpNameSync without explicit type coercion. This vulnerability is fixed in 0.2.7.
Severity
8.2 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-tmp",
"binary_version": "0.0.28-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "node-tmp",
"purl": "pkg:deb/ubuntu/node-tmp@0.0.28-1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.0.25-1",
"0.0.28-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-tmp",
"binary_version": "0.0.31-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "node-tmp",
"purl": "pkg:deb/ubuntu/node-tmp@0.0.31-1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.0.31-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-tmp",
"binary_version": "0.1.0+dfsg-6"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "node-tmp",
"purl": "pkg:deb/ubuntu/node-tmp@0.1.0+dfsg-6?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.0.33+dfsg-2",
"0.1.0+dfsg-2",
"0.1.0+dfsg-3",
"0.1.0+dfsg-6"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-tmp",
"binary_version": "0.2.1+dfsg+~0.2.2-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "node-tmp",
"purl": "pkg:deb/ubuntu/node-tmp@0.2.1+dfsg+~0.2.2-1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.2.1+dfsg-1",
"0.2.1+dfsg-2",
"0.2.1+dfsg+~0.2.2-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-tmp",
"binary_version": "0.2.2+dfsg+~0.2.3-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "node-tmp",
"purl": "pkg:deb/ubuntu/node-tmp@0.2.2+dfsg+~0.2.3-1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.2.2+dfsg+~0.2.3-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-tmp",
"binary_version": "0.2.2+dfsg+~0.2.3-1.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "node-tmp",
"purl": "pkg:deb/ubuntu/node-tmp@0.2.2+dfsg+~0.2.3-1.1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.2.2+dfsg+~0.2.3-1",
"0.2.2+dfsg+~0.2.3-1.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-tmp",
"binary_version": "0.2.5+dfsg+~0.2.6-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "node-tmp",
"purl": "pkg:deb/ubuntu/node-tmp@0.2.5+dfsg+~0.2.6-2?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.2.2+dfsg+~0.2.3-1.1",
"0.2.5+dfsg+~0.2.6-1",
"0.2.5+dfsg+~0.2.6-2"
]
}
],
"aliases": [],
"details": "tmp is a temporary file and directory creator for node.js. In version 0.2.6, the _assertPath guard added to tmp rejects only string values that contain the substring ... It is bypassed when prefix, postfix, or template is supplied as a non-string value (Array, Buffer, or any object) whose includes(\u0027..\u0027) returns falsy but whose stringification still contains ../. The value flows through Array.prototype.join/String coercion inside _generateTmpName and path.join(tmpDir, opts.dir, name), producing a final path that escapes tmpdir and creates a file or directory at an attacker-controlled location with the host process\u0027s privileges. This affects any application that forwards untrusted request data (a common pattern is JSON body fields or qs-parsed bracket-array query strings such as ?prefix[]=...) into tmp.file, tmp.fileSync, tmp.dir, tmp.dirSync, tmp.tmpName, or tmp.tmpNameSync without explicit type coercion. This vulnerability is fixed in 0.2.7.",
"id": "UBUNTU-CVE-2026-49982",
"modified": "2026-06-17T04:30:54Z",
"published": "2026-06-11T17:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-49982"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-49982"
},
{
"type": "REPORT",
"url": "https://github.com/raszi/node-tmp/security/advisories/GHSA-7c78-jf6q-g5cm"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-49982"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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