High
cbor2 — security advisory
cbor2 provides encoding and decoding for the Concise Binary Object Representation (CBOR) (RFC 8949) serialization format. Starting in version 5.5.1 and prior to version 5.6.2, an attacker can crash a service using cbor2 to parse a CBOR binary by sending a long enough object. Version 5.6.2 contains a patch for this issue.
- Products
- cbor2
- Affected versions
- 5.2.0-4, 5.2.0-4build1, 5.4.2-1, 5.4.2-1build1, 5.4.6-2, 5.4.6-2build1, 5.5.1-1, 5.6.0-1, 5.6.1-1, 5.6.2-1, 5.6.2-1build1, 5.6.5-1build1, 5.7.0-1, 5.7.1-1, 5.8.0-1, 5.8.0-2ubuntu1, 6.1.2-2
- Fixed versions
- Not specified
- CVEs
- CVE-2024-26134
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:12 UTC · Revision 1
Source evidence
cbor2 provides encoding and decoding for the Concise Binary Object Representation (CBOR) (RFC 8949) serialization format. Starting in version 5.5.1 and prior to version 5.6.2, an attacker can crash a service using cbor2 to parse a CBOR binary by sending a long enough object. Version 5.6.2 contains a patch for this issue.
osv:UBUNTU-CVE-2024-26134
cbor2
Fixed versions: Not specified
cbor2
Fixed versions: Not specified
cbor2
Fixed versions: Not specified
cbor2
Fixed versions: Not specified
cbor2
Fixed versions: Not specified
Complete source record
{
"id": "fce9c60d7e518c56d8b2c3681946a976b55d5c41f29997cc5a6eeb9c4be28f7f",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2024-26134",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2024-26134",
"summary": "cbor2 provides encoding and decoding for the Concise Binary Object Representation (CBOR) (RFC 8949) serialization format. Starting in version 5.5.1 and prior to version 5.6.2, an attacker can crash a service using cbor2 to parse a CBOR binary by sending a long enough object. Version 5.6.2 contains a patch for this issue.",
"evidence": "osv:UBUNTU-CVE-2024-26134",
"products": [
{
"name": {
"value": "cbor2",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.2.0-4",
"evidence": "/affected/0/versions"
},
{
"value": "5.2.0-4build1",
"evidence": "/affected/0/versions"
},
{
"value": "5.4.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "5.4.2-1build1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "cbor2",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.4.6-2",
"evidence": "/affected/1/versions"
},
{
"value": "5.4.6-2build1",
"evidence": "/affected/1/versions"
},
{
"value": "5.5.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "5.6.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "5.6.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "5.6.2-1",
"evidence": "/affected/1/versions"
},
{
"value": "5.6.2-1build1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "cbor2",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.6.5-1build1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "cbor2",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.8.0-2ubuntu1",
"evidence": "/affected/3/versions"
},
{
"value": "6.1.2-2",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "cbor2",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.6.5-1build1",
"evidence": "/affected/4/versions"
},
{
"value": "5.7.0-1",
"evidence": "/affected/4/versions"
},
{
"value": "5.7.1-1",
"evidence": "/affected/4/versions"
},
{
"value": "5.8.0-1",
"evidence": "/affected/4/versions"
},
{
"value": "5.8.0-2ubuntu1",
"evidence": "/affected/4/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2024-26134",
"aliases": [
"UBUNTU-CVE-2024-26134"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cbor2",
"purl": "pkg:deb/ubuntu/cbor2?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"5.2.0-4",
"5.2.0-4build1",
"5.4.2-1",
"5.4.2-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-26134.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-cbor2",
"binary_version": "5.4.2-1build1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cbor2",
"purl": "pkg:deb/ubuntu/cbor2?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"5.4.6-2",
"5.4.6-2build1",
"5.5.1-1",
"5.6.0-1",
"5.6.1-1",
"5.6.2-1",
"5.6.2-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-26134.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-cbor2",
"binary_version": "5.6.2-1build1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cbor2",
"purl": "pkg:deb/ubuntu/cbor2?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"5.6.5-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-26134.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-cbor2",
"binary_version": "5.6.5-1build1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cbor2",
"purl": "pkg:deb/ubuntu/cbor2?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"5.8.0-2ubuntu1",
"6.1.2-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-26134.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-cbor2",
"binary_version": "6.1.2-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cbor2",
"purl": "pkg:deb/ubuntu/cbor2?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"5.6.5-1build1",
"5.7.0-1",
"5.7.1-1",
"5.8.0-1",
"5.8.0-2ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-26134.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-cbor2",
"binary_version": "5.8.0-2ubuntu1"
}
]
}
}
],
"modified": "2026-10-17T12:56:43.720218637Z",
"provider": "osv",
"upstream": [
"CVE-2024-26134"
],
"references": [
"https://ubuntu.com/security/CVE-2024-26134",
"https://github.com/agronholm/cbor2/security/advisories/GHSA-375g-39jq-vq7m",
"https://github.com/agronholm/cbor2/pull/204",
"https://github.com/agronholm/cbor2/commit/387755eacf0be35591a478d3c67fe10618a6d542",
"https://github.com/agronholm/cbor2/commit/4de6991ba29bf2290d7b9d83525eda7d021873df",
"https://github.com/agronholm/cbor2/releases/tag/5.6.2",
"https://www.cve.org/CVERecord?id=CVE-2024-26134"
]
},
"related_cves": [
{
"value": "CVE-2024-26134",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 356064,
"published_at": "2024-02-19T23:15:00+00:00"
}