UBUNTU-CVE-2026-87933

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Source
https://ubuntu.com/security/CVE-2026-87933
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87933.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-87933
Upstream
Published
2026-09-10T01:16:00Z
Modified
2026-09-16T14:03:21Z
Severity
  • 7.3 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
  • 5.5 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A vulnerability was found in DaveGamble cJSON up to 1.7.19. The affected element is the function cJSONUtils_MergePatch of the file cJSON_Utils.c. The manipulation results in use after free. The attack may be launched remotely. The exploit has been made public and could be used. The pull request to fix this issue awaits acceptance.

References

Affected packages

Ubuntu:Pro:20.04:LTS / cjson

Package

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

Affected ranges

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

Affected versions

1.*
1.7.10-1.1
1.7.10-1.1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libcjson1",
            "binary_version":  "1.7.10-1.1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87933.json"

Ubuntu:Pro:22.04:LTS / cjson

Package

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

Affected ranges

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

Affected versions

1.*
1.7.14-1
1.7.15-1
1.7.15-1ubuntu0.1~esm2
1.7.15-1ubuntu0.1
1.7.15-1ubuntu0.1+esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libcjson1",
            "binary_version":  "1.7.15-1ubuntu0.1+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87933.json"

Ubuntu:Pro:24.04:LTS / cjson

Package

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

Affected ranges

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

Affected versions

1.*
1.7.16-1
1.7.16-2
1.7.17-1
1.7.17-1ubuntu0.1~esm2
1.7.17-1ubuntu0.1~esm3

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libcjson1",
            "binary_version":  "1.7.17-1ubuntu0.1~esm3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87933.json"

Ubuntu:26.04:LTS / cjson

Package

Name
cjson
Purl
pkg:deb/ubuntu/cjson?arch=source&distro=resolute

Affected ranges

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

Affected versions

1.*
1.7.18-3.1
1.7.18-4
1.7.19-1
1.7.19-2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libcjson1",
            "binary_version":  "1.7.19-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87933.json"