UBUNTU-CVE-2026-49982

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Source
https://ubuntu.com/security/CVE-2026-49982
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49982.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-49982
Upstream
Published
2026-06-11T17:16:00Z
Modified
2026-06-17T04:30:54Z
Severity
  • 8.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
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.

References

Affected packages

Ubuntu:16.04:LTS
node-tmp

Package

Name
node-tmp
Purl
pkg:deb/ubuntu/node-tmp?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.0.25-1
0.0.28-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-tmp",
            "binary_version": "0.0.28-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49982.json"
Ubuntu:18.04:LTS
node-tmp

Package

Name
node-tmp
Purl
pkg:deb/ubuntu/node-tmp?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.0.31-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-tmp",
            "binary_version": "0.0.31-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49982.json"
Ubuntu:20.04:LTS
node-tmp

Package

Name
node-tmp
Purl
pkg:deb/ubuntu/node-tmp?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
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": "0.1.0+dfsg-6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49982.json"
Ubuntu:22.04:LTS
node-tmp

Package

Name
node-tmp
Purl
pkg:deb/ubuntu/node-tmp?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
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": "0.2.1+dfsg+~0.2.2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49982.json"
Ubuntu:24.04:LTS
node-tmp

Package

Name
node-tmp
Purl
pkg:deb/ubuntu/node-tmp?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49982.json"
Ubuntu:25.10
node-tmp

Package

Name
node-tmp
Purl
pkg:deb/ubuntu/node-tmp?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
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": "0.2.2+dfsg+~0.2.3-1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49982.json"
Ubuntu:26.04:LTS
node-tmp

Package

Name
node-tmp
Purl
pkg:deb/ubuntu/node-tmp?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-tmp",
            "binary_version": "0.2.5+dfsg+~0.2.6-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49982.json"