UnratedFix available
Fix CVE(s): CVE-2026-0864
Type: advisorySources: OSV
* SECURITY UPDATE: configuration-file injection in the configparser module when writing multi-line values that contain carriage returns - debian/patches/CVE-2026-0864.patch: normalize CRLF and bare CR to LF before applying the newline-to-tab continuation escape in _write_section() in Lib/configparser.py, so an attacker-controlled value can no longer inject additional keys and sections into the written file; adds the upstream regression test test_crlf_normalization to Lib/test/test_configparser.py. - CVE-2026-0864
- Products
- idle-python3.6, libpython3.6, libpython3.6-dev, libpython3.6-minimal, libpython3.6-stdlib, libpython3.6-testsuite, python3.6, python3.6-dev, python3.6-doc, python3.6-examples, python3.6-minimal, python3.6-venv
- Affected versions
- Not specified
- Fixed versions
- 3.6.9-1~18.04ubuntu1.12+tuxcare.els25
- CVEs
- CVE-2026-0864
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:41 UTC · Revision 1
Source evidence
* SECURITY UPDATE: configuration-file injection in the configparser module when writing multi-line values that contain carriage returns - debian/patches/CVE-2026-0864.patch: normalize CRLF and bare CR to LF before applying the newline-to-tab continuation escape in _write_section() in Lib/configparser.py, so an attacker-controlled value can no longer inject additional keys and sections into the written file; adds the upstream regression test test_crlf_normalization to Lib/test/test_configparser.py. - CVE-2026-0864
osv:CLSA-2026-1787664255
idle-python3.6
Fixed versions: 3.6.9-1~18.04ubuntu1.12+tuxcare.els25
libpython3.6
Fixed versions: 3.6.9-1~18.04ubuntu1.12+tuxcare.els25
libpython3.6-dev
Fixed versions: 3.6.9-1~18.04ubuntu1.12+tuxcare.els25
libpython3.6-minimal
Fixed versions: 3.6.9-1~18.04ubuntu1.12+tuxcare.els25
libpython3.6-stdlib
Fixed versions: 3.6.9-1~18.04ubuntu1.12+tuxcare.els25
libpython3.6-testsuite
Fixed versions: 3.6.9-1~18.04ubuntu1.12+tuxcare.els25
python3.6
Fixed versions: 3.6.9-1~18.04ubuntu1.12+tuxcare.els25
python3.6-dev
Fixed versions: 3.6.9-1~18.04ubuntu1.12+tuxcare.els25
python3.6-doc
Fixed versions: 3.6.9-1~18.04ubuntu1.12+tuxcare.els25
python3.6-examples
Fixed versions: 3.6.9-1~18.04ubuntu1.12+tuxcare.els25
python3.6-minimal
Fixed versions: 3.6.9-1~18.04ubuntu1.12+tuxcare.els25
python3.6-venv
Fixed versions: 3.6.9-1~18.04ubuntu1.12+tuxcare.els25
Complete source record
{
"id": "925ddacfb1a65059c323ef8a79fe9f652ed954a79eb814aabf7f8ade101c842e",
"url": "https://osv.dev/vulnerability/CLSA-2026-1787664255",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fix CVE(s): CVE-2026-0864",
"summary": "* SECURITY UPDATE: configuration-file injection in the configparser module when writing multi-line values that contain carriage returns - debian/patches/CVE-2026-0864.patch: normalize CRLF and bare CR to LF before applying the newline-to-tab continuation escape in _write_section() in Lib/configparser.py, so an attacker-controlled value can no longer inject additional keys and sections into the written file; adds the upstream regression test test_crlf_normalization to Lib/test/test_configparser.py. - CVE-2026-0864",
"evidence": "osv:CLSA-2026-1787664255",
"products": [
{
"name": {
"value": "idle-python3.6",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libpython3.6",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libpython3.6-dev",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libpython3.6-minimal",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libpython3.6-stdlib",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libpython3.6-testsuite",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.6",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.6-dev",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.6-doc",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25",
"evidence": "/affected/8/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.6-examples",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25",
"evidence": "/affected/9/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.6-minimal",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25",
"evidence": "/affected/10/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.6-venv",
"evidence": "/affected/11/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25",
"evidence": "/affected/11/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1787664255",
"aliases": [
"CLSA-2026-1787664255"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25"
}
]
}
],
"package": {
"name": "idle-python3.6",
"purl": "pkg:deb/tuxcare/idle-python3.6?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787664255.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25"
}
]
}
],
"package": {
"name": "libpython3.6",
"purl": "pkg:deb/tuxcare/libpython3.6?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787664255.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25"
}
]
}
],
"package": {
"name": "libpython3.6-dev",
"purl": "pkg:deb/tuxcare/libpython3.6-dev?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787664255.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25"
}
]
}
],
"package": {
"name": "libpython3.6-minimal",
"purl": "pkg:deb/tuxcare/libpython3.6-minimal?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787664255.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25"
}
]
}
],
"package": {
"name": "libpython3.6-stdlib",
"purl": "pkg:deb/tuxcare/libpython3.6-stdlib?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787664255.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25"
}
]
}
],
"package": {
"name": "libpython3.6-testsuite",
"purl": "pkg:deb/tuxcare/libpython3.6-testsuite?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787664255.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25"
}
]
}
],
"package": {
"name": "python3.6",
"purl": "pkg:deb/tuxcare/python3.6?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787664255.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25"
}
]
}
],
"package": {
"name": "python3.6-dev",
"purl": "pkg:deb/tuxcare/python3.6-dev?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787664255.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25"
}
]
}
],
"package": {
"name": "python3.6-doc",
"purl": "pkg:deb/tuxcare/python3.6-doc?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787664255.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25"
}
]
}
],
"package": {
"name": "python3.6-examples",
"purl": "pkg:deb/tuxcare/python3.6-examples?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787664255.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25"
}
]
}
],
"package": {
"name": "python3.6-minimal",
"purl": "pkg:deb/tuxcare/python3.6-minimal?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787664255.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.9-1~18.04ubuntu1.12+tuxcare.els25"
}
]
}
],
"package": {
"name": "python3.6-venv",
"purl": "pkg:deb/tuxcare/python3.6-venv?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787664255.json"
}
}
],
"modified": "2026-10-26T09:32:03.622963535Z",
"provider": "osv",
"upstream": [
"CVE-2026-0864"
],
"references": [
"https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2026-1787664255.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-0864"
]
},
"related_cves": [
{
"value": "CVE-2026-0864",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 449541,
"published_at": "2026-08-25T15:26:34+00:00"
}