UBUNTU-CVE-2026-33948

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Source
https://ubuntu.com/security/CVE-2026-33948
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33948.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-33948
Upstream
  • CVE-2026-33948
Published
2026-04-14T00:16:00Z
Modified
2026-04-16T11:05:48.782787Z
Severity
  • 2.9 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

jq is a command-line JSON processor. Commits before 6374ae0bcdfe33a18eb0ae6db28493b1f34a0a5b contain a vulnerability where CLI input parsing allows validation bypass via embedded NUL bytes. When reading JSON from files or stdin, jq uses strlen() to determine buffer length instead of the actual byte count from fgets(), causing it to truncate input at the first NUL byte and parse only the preceding prefix. This enables an attacker to craft input with a benign JSON prefix before a NUL byte followed by malicious trailing data, where jq validates only the prefix as valid JSON while silently discarding the suffix. Workflows relying on jq to validate untrusted JSON before forwarding it to downstream consumers are susceptible to parser differential attacks, as those consumers may process the full input including the malicious trailing bytes. This issue has been patched by commit 6374ae0bcdfe33a18eb0ae6db28493b1f34a0a5b.

References

Affected packages

Ubuntu:22.04:LTS
jq

Package

Name
jq
Purl
pkg:deb/ubuntu/jq@1.6-2.1ubuntu3.1?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*
1.6-2.1ubuntu2
1.6-2.1ubuntu3
1.6-2.1ubuntu3.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.6-2.1ubuntu3.1",
            "binary_name": "jq"
        },
        {
            "binary_version": "1.6-2.1ubuntu3.1",
            "binary_name": "libjq-dev"
        },
        {
            "binary_version": "1.6-2.1ubuntu3.1",
            "binary_name": "libjq1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33948.json"
Ubuntu:24.04:LTS
jq

Package

Name
jq
Purl
pkg:deb/ubuntu/jq@1.7.1-3ubuntu0.24.04.1?arch=source&distro=noble

Affected ranges

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

Affected versions

1.*
1.6-3
1.7-1
1.7.1-2
1.7.1-3
1.7.1-3build1
1.7.1-3ubuntu0.24.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.7.1-3ubuntu0.24.04.1",
            "binary_name": "jq"
        },
        {
            "binary_version": "1.7.1-3ubuntu0.24.04.1",
            "binary_name": "libjq-dev"
        },
        {
            "binary_version": "1.7.1-3ubuntu0.24.04.1",
            "binary_name": "libjq1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33948.json"
Ubuntu:25.10
jq

Package

Name
jq
Purl
pkg:deb/ubuntu/jq@1.8.1-3ubuntu1?arch=source&distro=questing

Affected ranges

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

Affected versions

1.*
1.7.1-3ubuntu1
1.7.1-6ubuntu1
1.8.1-3ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.8.1-3ubuntu1",
            "binary_name": "jq"
        },
        {
            "binary_version": "1.8.1-3ubuntu1",
            "binary_name": "libjq-dev"
        },
        {
            "binary_version": "1.8.1-3ubuntu1",
            "binary_name": "libjq1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33948.json"
Ubuntu:Pro:14.04:LTS
jq

Package

Name
jq
Purl
pkg:deb/ubuntu/jq@1.3-1.1ubuntu1.1+esm3?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

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

Affected versions

1.*
1.2-8
1.3-1
1.3-1.1ubuntu1
1.3-1.1ubuntu1.1
1.3-1.1ubuntu1.1+esm3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.3-1.1ubuntu1.1+esm3",
            "binary_name": "jq"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33948.json"
Ubuntu:Pro:16.04:LTS
jq

Package

Name
jq
Purl
pkg:deb/ubuntu/jq@1.5+dfsg-1ubuntu0.1+esm3?arch=source&distro=esm-apps/xenial

Affected ranges

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

Affected versions

1.*
1.4-2.1
1.5+dfsg-1
1.5+dfsg-1ubuntu0.1
1.5+dfsg-1ubuntu0.1+esm2
1.5+dfsg-1ubuntu0.1+esm3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.5+dfsg-1ubuntu0.1+esm3",
            "binary_name": "jq"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33948.json"
Ubuntu:Pro:18.04:LTS
jq

Package

Name
jq
Purl
pkg:deb/ubuntu/jq@1.5+dfsg-2ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic

Affected ranges

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

Affected versions

1.*
1.5+dfsg-2
1.5+dfsg-2ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.5+dfsg-2ubuntu0.1~esm1",
            "binary_name": "jq"
        },
        {
            "binary_version": "1.5+dfsg-2ubuntu0.1~esm1",
            "binary_name": "libjq-dev"
        },
        {
            "binary_version": "1.5+dfsg-2ubuntu0.1~esm1",
            "binary_name": "libjq1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33948.json"
Ubuntu:Pro:20.04:LTS
jq

Package

Name
jq
Purl
pkg:deb/ubuntu/jq@1.6-1ubuntu0.20.04.1+esm1?arch=source&distro=esm-infra/focal

Affected ranges

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

Affected versions

1.*
1.5+dfsg-2build1
1.6-1
1.6-1ubuntu0.20.04.1
1.6-1ubuntu0.20.04.1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.6-1ubuntu0.20.04.1+esm1",
            "binary_name": "jq"
        },
        {
            "binary_version": "1.6-1ubuntu0.20.04.1+esm1",
            "binary_name": "libjq-dev"
        },
        {
            "binary_version": "1.6-1ubuntu0.20.04.1+esm1",
            "binary_name": "libjq1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33948.json"