usn-8524-1
Vulnerability from osv_ubuntu
Published
2026-07-09 15:11
Modified
2026-07-09 15:11
Summary
python2.7, python3.5 vulnerability
Details
It was discovered that Python did not use sufficient entropy for Expat hash-flooding protection in the xml.parsers.expat and xml.etree.ElementTree modules. An attacker could use this to cause a denial of service via a crafted XML document.
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [],
"ecosystem": "Ubuntu:Pro:16.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "idle-python2.7",
"binary_version": "2.7.12-1ubuntu0~16.04.18+esm20"
},
{
"binary_name": "libpython2.7",
"binary_version": "2.7.12-1ubuntu0~16.04.18+esm20"
},
{
"binary_name": "libpython2.7-minimal",
"binary_version": "2.7.12-1ubuntu0~16.04.18+esm20"
},
{
"binary_name": "libpython2.7-stdlib",
"binary_version": "2.7.12-1ubuntu0~16.04.18+esm20"
},
{
"binary_name": "libpython2.7-testsuite",
"binary_version": "2.7.12-1ubuntu0~16.04.18+esm20"
},
{
"binary_name": "python2.7",
"binary_version": "2.7.12-1ubuntu0~16.04.18+esm20"
},
{
"binary_name": "python2.7-examples",
"binary_version": "2.7.12-1ubuntu0~16.04.18+esm20"
},
{
"binary_name": "python2.7-minimal",
"binary_version": "2.7.12-1ubuntu0~16.04.18+esm20"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "python2.7",
"purl": "pkg:deb/ubuntu/python2.7@2.7.12-1ubuntu0~16.04.18+esm20?arch=source\u0026distro=esm-infra-legacy/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.7.12-1ubuntu0~16.04.18+esm20"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.7.10-4ubuntu1",
"2.7.10-4ubuntu2",
"2.7.11-2",
"2.7.11-3",
"2.7.11-4",
"2.7.11-6",
"2.7.11-7",
"2.7.11-7ubuntu1",
"2.7.12-1~16.04",
"2.7.12-1ubuntu0~16.04.1",
"2.7.12-1ubuntu0~16.04.2",
"2.7.12-1ubuntu0~16.04.3",
"2.7.12-1ubuntu0~16.04.4",
"2.7.12-1ubuntu0~16.04.8",
"2.7.12-1ubuntu0~16.04.9",
"2.7.12-1ubuntu0~16.04.11",
"2.7.12-1ubuntu0~16.04.12",
"2.7.12-1ubuntu0~16.04.13",
"2.7.12-1ubuntu0~16.04.14",
"2.7.12-1ubuntu0~16.04.16",
"2.7.12-1ubuntu0~16.04.18",
"2.7.12-1ubuntu0~16.04.18+esm1",
"2.7.12-1ubuntu0~16.04.18+esm2",
"2.7.12-1ubuntu0~16.04.18+esm3",
"2.7.12-1ubuntu0~16.04.18+esm4",
"2.7.12-1ubuntu0~16.04.18+esm5",
"2.7.12-1ubuntu0~16.04.18+esm6",
"2.7.12-1ubuntu0~16.04.18+esm7",
"2.7.12-1ubuntu0~16.04.18+esm8",
"2.7.12-1ubuntu0~16.04.18+esm9",
"2.7.12-1ubuntu0~16.04.18+esm10",
"2.7.12-1ubuntu0~16.04.18+esm11",
"2.7.12-1ubuntu0~16.04.18+esm12",
"2.7.12-1ubuntu0~16.04.18+esm13",
"2.7.12-1ubuntu0~16.04.18+esm15",
"2.7.12-1ubuntu0~16.04.18+esm16",
"2.7.12-1ubuntu0~16.04.18+esm17",
"2.7.12-1ubuntu0~16.04.18+esm18",
"2.7.12-1ubuntu0~16.04.18+esm19"
]
},
{
"database_specific": {
"cves_map": {
"cves": [],
"ecosystem": "Ubuntu:Pro:16.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "idle-python3.5",
"binary_version": "3.5.2-2ubuntu0~16.04.13+esm23"
},
{
"binary_name": "libpython3.5",
"binary_version": "3.5.2-2ubuntu0~16.04.13+esm23"
},
{
"binary_name": "libpython3.5-minimal",
"binary_version": "3.5.2-2ubuntu0~16.04.13+esm23"
},
{
"binary_name": "libpython3.5-stdlib",
"binary_version": "3.5.2-2ubuntu0~16.04.13+esm23"
},
{
"binary_name": "libpython3.5-testsuite",
"binary_version": "3.5.2-2ubuntu0~16.04.13+esm23"
},
{
"binary_name": "python3.5",
"binary_version": "3.5.2-2ubuntu0~16.04.13+esm23"
},
{
"binary_name": "python3.5-examples",
"binary_version": "3.5.2-2ubuntu0~16.04.13+esm23"
},
{
"binary_name": "python3.5-minimal",
"binary_version": "3.5.2-2ubuntu0~16.04.13+esm23"
},
{
"binary_name": "python3.5-venv",
"binary_version": "3.5.2-2ubuntu0~16.04.13+esm23"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "python3.5",
"purl": "pkg:deb/ubuntu/python3.5@3.5.2-2ubuntu0~16.04.13+esm23?arch=source\u0026distro=esm-infra-legacy/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.5.2-2ubuntu0~16.04.13+esm23"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.5.0-3",
"3.5.0-3ubuntu1",
"3.5.1~rc1-2ubuntu1",
"3.5.1-1",
"3.5.1-2",
"3.5.1-3",
"3.5.1-5",
"3.5.1-6ubuntu1",
"3.5.1-6ubuntu2",
"3.5.1-9ubuntu1",
"3.5.1-10",
"3.5.2-2~16.01",
"3.5.2-2~16.04",
"3.5.2-2ubuntu0~16.04.1",
"3.5.2-2ubuntu0~16.04.2",
"3.5.2-2ubuntu0~16.04.3",
"3.5.2-2ubuntu0~16.04.4",
"3.5.2-2ubuntu0~16.04.5",
"3.5.2-2ubuntu0~16.04.8",
"3.5.2-2ubuntu0~16.04.9",
"3.5.2-2ubuntu0~16.04.10",
"3.5.2-2ubuntu0~16.04.11",
"3.5.2-2ubuntu0~16.04.12",
"3.5.2-2ubuntu0~16.04.13",
"3.5.2-2ubuntu0~16.04.13+esm1",
"3.5.2-2ubuntu0~16.04.13+esm2",
"3.5.2-2ubuntu0~16.04.13+esm3",
"3.5.2-2ubuntu0~16.04.13+esm5",
"3.5.2-2ubuntu0~16.04.13+esm6",
"3.5.2-2ubuntu0~16.04.13+esm7",
"3.5.2-2ubuntu0~16.04.13+esm8",
"3.5.2-2ubuntu0~16.04.13+esm9",
"3.5.2-2ubuntu0~16.04.13+esm10",
"3.5.2-2ubuntu0~16.04.13+esm11",
"3.5.2-2ubuntu0~16.04.13+esm12",
"3.5.2-2ubuntu0~16.04.13+esm13",
"3.5.2-2ubuntu0~16.04.13+esm14",
"3.5.2-2ubuntu0~16.04.13+esm15",
"3.5.2-2ubuntu0~16.04.13+esm16",
"3.5.2-2ubuntu0~16.04.13+esm17",
"3.5.2-2ubuntu0~16.04.13+esm18",
"3.5.2-2ubuntu0~16.04.13+esm19",
"3.5.2-2ubuntu0~16.04.13+esm20",
"3.5.2-2ubuntu0~16.04.13+esm21",
"3.5.2-2ubuntu0~16.04.13+esm22"
]
}
],
"aliases": [],
"details": "It was discovered that Python did not use sufficient entropy for Expat\nhash-flooding protection in the xml.parsers.expat and xml.etree.ElementTree\nmodules. An attacker could use this to cause a denial of service via a\ncrafted XML document.",
"id": "USN-8524-1",
"modified": "2026-07-09T15:11:48Z",
"published": "2026-07-09T15:11:48Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8524-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-7210"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "python2.7, python3.5 vulnerability",
"upstream": [
"UBUNTU-CVE-2026-7210"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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