Medium
collada2gltf, pandas and 1 more products — security advisory
UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Prior to 5.13.0, ujson.dumps() (or ujson.dump() or ujson.encode()) have a reject_bytes=False option. When set, they may accept malformed or truncated UTF-8 byte sequences, silently rewriting them into different Unicode characters instead of rejecting them. This leads to input validation bypass and data integrity issues. This vulnerability is fixed in 5.13.0.
- Products
- collada2gltf, pandas, ujson
- Affected versions
- 0.12.0-2ubuntu1, 0.13.1-2ubuntu1, 0.13.1-2ubuntu2, 0.15.0-2, 0.15.0-2ubuntu1, 0.15.0-2ubuntu2, 0.17.1-3ubuntu2, 0.19.2-5.1ubuntu4, 0.22.0-2ubuntu1, 0.22.0-3, 0.22.0-4, 0.22.0-4ubuntu1, 0.23.3+dfsg-4ubuntu1, 0.23.3+dfsg-4ubuntu5, 0.23.3+dfsg-4ubuntu6, 0.25.3+dfsg-4, 0.25.3+dfsg-4build1, 0.25.3+dfsg-7, 1.1.5+dfsg-2, 1.1.5+dfsg-2ubuntu1, 1.3.5+dfsg-2, 1.3.5+dfsg-2ubuntu1, 1.3.5+dfsg-3, 1.33-1, 1.33-1build1, 1.33-1ubuntu0.1~esm2, 1.35-1build2, 1.35-2, 1.35-2ubuntu0.1~esm1, 1.35-3build1, 1.35-3build2, 1.35-4, 1.35-4build1, 1.35-4ubuntu0.1, 1.35-4ubuntu0.1+esm1, 1.5.3+dfsg-10, 1.5.3+dfsg-6, 1.5.3+dfsg-6ubuntu1, 1.5.3+dfsg-7ubuntu1, 2.1.4+dfsg-4ubuntu2, 2.1.4+dfsg-7, 2.2.3+dfsg-8build1, 2.2.3+dfsg-9, 2.3.3+dfsg-1ubuntu1, 2.3.3+dfsg-3, 2.3.3+dfsg-3ubuntu1, 2.3.3+dfsg-3ubuntu3, 20140924-3, 20140924-4, 20140924-7build1, 20140924-8, 4.0.2-1, 4.0.2-1build1, 4.2.0-1, 5.1.0-1, 5.1.0-1build1, 5.1.0-1ubuntu0.1~esm1, 5.1.0-1ubuntu0.1~esm2, 5.10.0-1build2, 5.10.0-1build3, 5.10.0-1ubuntu0.1, 5.11.0-3, 5.11.0-3build1, 5.11.0-3ubuntu0.1, 5.13.0-1, 5.8.0-1, 5.8.0-1build1, 5.9.0-1, 5.9.0-1build1, 5.9.0-1ubuntu0.1~esm1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-54911
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:09 UTC · Revision 1
Source evidence
UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Prior to 5.13.0, ujson.dumps() (or ujson.dump() or ujson.encode()) have a reject_bytes=False option. When set, they may accept malformed or truncated UTF-8 byte sequences, silently rewriting them into different Unicode characters instead of rejecting them. This leads to input validation bypass and data integrity issues. This vulnerability is fixed in 5.13.0.
osv:UBUNTU-CVE-2026-54911
pandas
Fixed versions: Not specified
collada2gltf
Fixed versions: Not specified
pandas
Fixed versions: Not specified
ujson
Fixed versions: Not specified
collada2gltf
Fixed versions: Not specified
pandas
Fixed versions: Not specified
ujson
Fixed versions: Not specified
pandas
Fixed versions: Not specified
ujson
Fixed versions: Not specified
collada2gltf
Fixed versions: Not specified
pandas
Fixed versions: Not specified
ujson
Fixed versions: Not specified
pandas
Fixed versions: Not specified
ujson
Fixed versions: Not specified
pandas
Fixed versions: Not specified
ujson
Fixed versions: Not specified
pandas
Fixed versions: Not specified
ujson
Fixed versions: Not specified
pandas
Fixed versions: Not specified
ujson
Fixed versions: Not specified
Complete source record
{
"id": "0a9ede7357a3e31bc991b6a0bf0b83bded6f39b0c3829d80055e3f5521f8890c",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-54911",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-54911",
"summary": "UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Prior to 5.13.0, ujson.dumps() (or ujson.dump() or ujson.encode()) have a reject_bytes=False option. When set, they may accept malformed or truncated UTF-8 byte sequences, silently rewriting them into different Unicode characters instead of rejecting them. This leads to input validation bypass and data integrity issues. This vulnerability is fixed in 5.13.0.",
"evidence": "osv:UBUNTU-CVE-2026-54911",
"products": [
{
"name": {
"value": "pandas",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.12.0-2ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "0.13.1-2ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "0.13.1-2ubuntu2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
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"affected_versions": [
{
"value": "20140924-3",
"evidence": "/affected/1/versions"
}
]
},
{
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{
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"evidence": "/affected/2/versions"
},
{
"value": "0.15.0-2ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "0.15.0-2ubuntu2",
"evidence": "/affected/2/versions"
},
{
"value": "0.17.1-3ubuntu2",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
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},
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{
"value": "1.33-1",
"evidence": "/affected/3/versions"
},
{
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"evidence": "/affected/3/versions"
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{
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},
{
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{
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]
},
{
"name": {
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{
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"evidence": "/affected/5/versions"
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{
"value": "0.22.0-2ubuntu1",
"evidence": "/affected/5/versions"
},
{
"value": "0.22.0-3",
"evidence": "/affected/5/versions"
},
{
"value": "0.22.0-4",
"evidence": "/affected/5/versions"
},
{
"value": "0.22.0-4ubuntu1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "ujson",
"evidence": "/affected/6/package/name"
},
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"affected_versions": [
{
"value": "1.35-1build2",
"evidence": "/affected/6/versions"
},
{
"value": "1.35-2",
"evidence": "/affected/6/versions"
},
{
"value": "1.35-2ubuntu0.1~esm1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "pandas",
"evidence": "/affected/7/package/name"
},
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{
"value": "0.23.3+dfsg-4ubuntu1",
"evidence": "/affected/7/versions"
},
{
"value": "0.23.3+dfsg-4ubuntu5",
"evidence": "/affected/7/versions"
},
{
"value": "0.23.3+dfsg-4ubuntu6",
"evidence": "/affected/7/versions"
},
{
"value": "0.25.3+dfsg-4",
"evidence": "/affected/7/versions"
},
{
"value": "0.25.3+dfsg-4build1",
"evidence": "/affected/7/versions"
},
{
"value": "0.25.3+dfsg-7",
"evidence": "/affected/7/versions"
}
]
},
{
"name": {
"value": "ujson",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.35-3build1",
"evidence": "/affected/8/versions"
},
{
"value": "1.35-3build2",
"evidence": "/affected/8/versions"
},
{
"value": "1.35-4",
"evidence": "/affected/8/versions"
},
{
"value": "1.35-4build1",
"evidence": "/affected/8/versions"
},
{
"value": "1.35-4ubuntu0.1",
"evidence": "/affected/8/versions"
},
{
"value": "1.35-4ubuntu0.1+esm1",
"evidence": "/affected/8/versions"
}
]
},
{
"name": {
"value": "collada2gltf",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "20140924-7build1",
"evidence": "/affected/9/versions"
},
{
"value": "20140924-8",
"evidence": "/affected/9/versions"
}
]
},
{
"name": {
"value": "pandas",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "1.1.5+dfsg-2",
"evidence": "/affected/10/versions"
},
{
"value": "1.1.5+dfsg-2ubuntu1",
"evidence": "/affected/10/versions"
},
{
"value": "1.3.5+dfsg-2",
"evidence": "/affected/10/versions"
},
{
"value": "1.3.5+dfsg-2ubuntu1",
"evidence": "/affected/10/versions"
},
{
"value": "1.3.5+dfsg-3",
"evidence": "/affected/10/versions"
}
]
},
{
"name": {
"value": "ujson",
"evidence": "/affected/11/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "4.0.2-1",
"evidence": "/affected/11/versions"
},
{
"value": "4.0.2-1build1",
"evidence": "/affected/11/versions"
},
{
"value": "4.2.0-1",
"evidence": "/affected/11/versions"
},
{
"value": "5.1.0-1",
"evidence": "/affected/11/versions"
},
{
"value": "5.1.0-1build1",
"evidence": "/affected/11/versions"
},
{
"value": "5.1.0-1ubuntu0.1~esm1",
"evidence": "/affected/11/versions"
},
{
"value": "5.1.0-1ubuntu0.1~esm2",
"evidence": "/affected/11/versions"
}
]
},
{
"name": {
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"evidence": "/affected/12/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "1.5.3+dfsg-6",
"evidence": "/affected/12/versions"
},
{
"value": "1.5.3+dfsg-6ubuntu1",
"evidence": "/affected/12/versions"
},
{
"value": "1.5.3+dfsg-7ubuntu1",
"evidence": "/affected/12/versions"
},
{
"value": "1.5.3+dfsg-10",
"evidence": "/affected/12/versions"
},
{
"value": "2.1.4+dfsg-4ubuntu2",
"evidence": "/affected/12/versions"
},
{
"value": "2.1.4+dfsg-7",
"evidence": "/affected/12/versions"
}
]
},
{
"name": {
"value": "ujson",
"evidence": "/affected/13/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "5.8.0-1",
"evidence": "/affected/13/versions"
},
{
"value": "5.8.0-1build1",
"evidence": "/affected/13/versions"
},
{
"value": "5.9.0-1",
"evidence": "/affected/13/versions"
},
{
"value": "5.9.0-1build1",
"evidence": "/affected/13/versions"
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{
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"evidence": "/affected/13/versions"
}
]
},
{
"name": {
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},
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{
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"evidence": "/affected/14/versions"
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{
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"evidence": "/affected/14/versions"
}
]
},
{
"name": {
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"evidence": "/affected/15/package/name"
},
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{
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"evidence": "/affected/15/versions"
},
{
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}
]
},
{
"name": {
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},
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{
"name": {
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},
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},
{
"value": "2.3.3+dfsg-1ubuntu1",
"evidence": "/affected/18/versions"
},
{
"value": "2.3.3+dfsg-3",
"evidence": "/affected/18/versions"
},
{
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]
},
{
"name": {
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{
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{
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"evidence": "/affected/19/versions"
},
{
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],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-54911",
"aliases": [
"UBUNTU-CVE-2026-54911"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
},
{
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},
"ecosystem_specific": {
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"package": {
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"ecosystem": "Ubuntu:16.04:LTS"
},
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],
"database_specific": {
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},
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{
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},
{
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],
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},
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"0.17.1-3ubuntu2"
],
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},
"ecosystem_specific": {
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},
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},
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"0.22.0-2ubuntu1",
"0.22.0-3",
"0.22.0-4",
"0.22.0-4ubuntu1"
],
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},
"ecosystem_specific": {
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{
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},
{
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"binary_version": "0.22.0-4ubuntu1"
},
{
"binary_name": "python3-pandas",
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},
{
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},
{
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"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
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"1.35-2",
"1.35-2ubuntu0.1~esm1"
],
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},
"ecosystem_specific": {
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{
"binary_name": "python-ujson",
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},
{
"binary_name": "python3-ujson",
"binary_version": "1.35-2ubuntu0.1~esm1"
}
]
}
},
{
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{
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}
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"https://github.com/ultrajson/ultrajson/commit/169eaf36b1116fece5034ee79a7a0ef3f6deedcf",
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"source_id": "core-osv",
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"published_at": "2026-06-22T22:16:00+00:00"
}