UBUNTU-CVE-2026-53655

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Source
https://ubuntu.com/security/CVE-2026-53655
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53655.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-53655
Upstream
Published
2026-06-22T16:16:00Z
Modified
2026-06-29T13:50:41.501009411Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

node-tar is a full-featured Tar for Node.js. Prior to 7.5.16, tar (node-tar) applies a PAX extended header's size= record (and other PAX overrides) to the next header entry of any type, including intermediary metadata headers such as a GNU long-name (L) or long-link (K) entry. Per POSIX pax, a PAX extended header (x) describes the next file entry, not the intermediary extension headers that may sit between the x header and the file it annotates. Because node-tar lets the PAX size override the byte length of an intervening L/K/x header, an attacker can desynchronize node-tar's stream cursor relative to every other mainstream tar implementation (GNU tar, libarchive/bsdtar, Python tarfile, and the now-fixed tar-rs / astral-tokio-tar). The result is a tar parser interpretation differential (CWE-436): a single crafted archive yields a different set of members under node-tar than under the reference tar tools. An attacker can use this to hide a member from one parser while it is visible to another, which defeats security tooling whose scanner and extractor disagree on archive contents (e.g. a malware/secret scanner that lists entries with one library while a downstream step extracts with another) This vulnerability is fixed in 7.5.16.

References

Affected packages

Ubuntu:18.04:LTS
node-tar

Package

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

Affected ranges

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

Affected versions

2.*
2.2.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-tar",
            "binary_version": "2.2.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53655.json"
Ubuntu:22.04:LTS
node-tar

Package

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

Affected ranges

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

Affected versions

6.*
6.1.7+~cs11.3.10-1
6.1.11+~cs11.3.10-1
6.1.11+ds1+~cs6.0.6-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-tar",
            "binary_version": "6.1.11+ds1+~cs6.0.6-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53655.json"
Ubuntu:24.04:LTS
node-tar

Package

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

Affected ranges

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

Affected versions

6.*
6.1.13+~cs7.0.5-1
6.1.13+~cs7.0.5-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-tar",
            "binary_version": "6.1.13+~cs7.0.5-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53655.json"
Ubuntu:25.10
node-tar

Package

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

Affected ranges

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

Affected versions

6.*
6.2.1+~cs7.0.8-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-tar",
            "binary_version": "6.2.1+~cs7.0.8-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53655.json"
Ubuntu:26.04:LTS
node-tar

Package

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

Affected ranges

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

Affected versions

6.*
6.2.1+~cs7.0.8-1
6.2.1+ds1+~cs6.1.13-6
6.2.1+ds1+~cs6.1.13-7
6.2.1+ds1+~cs6.1.13-10

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-tar",
            "binary_version": "6.2.1+ds1+~cs6.1.13-10"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53655.json"
Ubuntu:Pro:14.04:LTS
node-tar

Package

Name
node-tar
Purl
pkg:deb/ubuntu/node-tar?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

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

Affected versions

0.*
0.1.18-1
0.1.18-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-tar",
            "binary_version": "0.1.18-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53655.json"
Ubuntu:Pro:16.04:LTS
node-tar

Package

Name
node-tar
Purl
pkg:deb/ubuntu/node-tar?arch=source&distro=esm-apps%2Fxenial

Affected ranges

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

Affected versions

1.*
1.0.3-2
1.0.3-2ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-tar",
            "binary_version": "1.0.3-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53655.json"
Ubuntu:Pro:20.04:LTS
node-tar

Package

Name
node-tar
Purl
pkg:deb/ubuntu/node-tar?arch=source&distro=esm-apps%2Ffocal

Affected ranges

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

Affected versions

4.*
4.4.10+ds1-2
4.4.10+ds1-2ubuntu1
4.4.10+ds1-2ubuntu1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "node-tar",
            "binary_version": "4.4.10+ds1-2ubuntu1+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53655.json"