UBUNTU-CVE-2026-71514

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Source

https://ubuntu.com/security/CVE-2026-71514

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71514.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-71514

Upstream

CVE-2026-71514

Published

2026-08-25T00:00:00Z

Modified

2026-08-27T11:01:24.693045023Z

Severity

2.0 (Low) CVSS_V4 - CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
2.5 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N CVSS Calculator
2.0 (Low) CVSS_V4 - CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
2.5 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

NLTK 3.9.4 through 3.10.2 contains a path traversal vulnerability in CrubadanCorpusReader. loadlangngrams joins the corpus root with crubadancode, the column-0 value read from the corpus table.txt mapping file, and opens the result with the builtin open() rather than the pathsec-validated opener, so os.path.join discards the root when that value is absolute and the read escapes the corpus directory without the containment check nltk.pathsec applies when ENFORCE is set. An attacker who controls a corpus package can disclose file contents outside the corpus root through lang_freq, limited to paths ending in -3grams.txt whose contents parse as token count lines.

References

Affected packages

Ubuntu:Pro:14.04:LTS

nltk

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.0~b9-0ubuntu4

2.0~b9-0ubuntu4.1~esm2

2.0~b9-0ubuntu4.1~esm4

2.0~b9-0ubuntu4.1~esm5

2.0~b9-0ubuntu4.1~esm6

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "python-nltk",
            "binary_version": "2.0~b9-0ubuntu4.1~esm6"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71514.json"

Ubuntu:Pro:16.04:LTS

nltk

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.0.4-1

3.0.5-1

3.1-1

3.1-1ubuntu0.1

3.1-1ubuntu0.1+esm1

3.1-1ubuntu0.1+esm2

3.1-1ubuntu0.1+esm3

3.1-1ubuntu0.1+esm4

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "python-nltk",
            "binary_version": "3.1-1ubuntu0.1+esm4"
        },
        {
            "binary_name": "python3-nltk",
            "binary_version": "3.1-1ubuntu0.1+esm4"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71514.json"

Ubuntu:Pro:18.04:LTS

nltk

Package

Name: nltk
Purl: pkg:deb/ubuntu/nltk?arch=source&distro=esm-apps%2Fbionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.2.4-1

3.2.5-1

3.2.5-1ubuntu0.1

3.2.5-1ubuntu0.1+esm1

3.2.5-1ubuntu0.1+esm2

3.2.5-1ubuntu0.1+esm3

3.2.5-1ubuntu0.1+esm4

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "python-nltk",
            "binary_version": "3.2.5-1ubuntu0.1+esm4"
        },
        {
            "binary_name": "python3-nltk",
            "binary_version": "3.2.5-1ubuntu0.1+esm4"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71514.json"

Ubuntu:Pro:20.04:LTS

nltk

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.4.5-1

3.4.5-2

3.4.5-2ubuntu0.1~esm1

3.4.5-2ubuntu0.1~esm2

3.4.5-2ubuntu0.1~esm3

3.4.5-2ubuntu0.1~esm4

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "python3-nltk",
            "binary_version": "3.4.5-2ubuntu0.1~esm4"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71514.json"

Ubuntu:Pro:22.04:LTS

nltk

Package

Name: nltk
Purl: pkg:deb/ubuntu/nltk?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.5-1

3.6.5-1

3.6.7-1

3.7-1

3.7-1ubuntu0.1~esm1

3.7-1ubuntu0.1~esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "python3-nltk",
            "binary_version": "3.7-1ubuntu0.1~esm2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71514.json"

Ubuntu:Pro:24.04:LTS

nltk

Package

Name: nltk
Purl: pkg:deb/ubuntu/nltk?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.8.1-1

3.8.1-1ubuntu0.1~esm1

3.8.1-1ubuntu0.1~esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "python3-nltk",
            "binary_version": "3.8.1-1ubuntu0.1~esm2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71514.json"

Ubuntu:Pro:26.04:LTS

nltk

Package

Name: nltk
Purl: pkg:deb/ubuntu/nltk?arch=source&distro=esm-apps%2Fresolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.9.1-2

3.9.1-2build1

3.9.2-1

3.9.2-1ubuntu0.1~esm1

3.9.2-1ubuntu0.1~esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "python3-nltk",
            "binary_version": "3.9.2-1ubuntu0.1~esm2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71514.json"