UBUNTU-CVE-2026-29036

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Source
https://ubuntu.com/security/CVE-2026-29036
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29036.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-29036
Upstream
Published
2026-08-13T00:00:00Z
Modified
2026-08-13T19:30:15.281339145Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

cJSON versions 1.5.0 through 1.7.19 contain an incorrectly-resolved name or reference vulnerability in the decodepointerinplace() function within cJSONUtils.c that allows unauthenticated attackers to cause JSON Patch operations to target wrong object keys by supplying crafted JSON Pointer escape sequences (~0 or ~1) in patch paths. Attackers can submit malicious RFC 6902 JSON Patch input to applications using cJSONUtilsApplyPatches() or cJSONUtils_ApplyPatchesCaseSensitive() to silently corrupt data or delete unintended keys, potentially bypassing authorization controls in applications that rely on JSON Patch for access-controlled data modification.

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
0Unknown 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_version": "1.7.10-1.1ubuntu0.1~esm1",
            "binary_name": "libcjson1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29036.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
0Unknown 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_version": "1.7.15-1ubuntu0.1+esm1",
            "binary_name": "libcjson1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29036.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
0Unknown 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_version": "1.7.17-1ubuntu0.1~esm3",
            "binary_name": "libcjson1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29036.json"

Ubuntu:26.04:LTS / cjson

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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_version": "1.7.19-2",
            "binary_name": "libcjson1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29036.json"