UnratedFix available
Fix CVE(s): CVE-2026-0864
Type: advisorySources: OSV
* SECURITY UPDATE: configuration injection in configparser via a carriage return in an attacker-controlled written value - debian/patches/CVE-2026-0864.patch: in Lib/configparser.py, normalize CR and CRLF to LF before indenting continuation lines in RawConfigParser._write_section(), so a bare carriage return inside a written value can no longer round-trip into an unindented line that the parser reads back as a separate "key = value" pair. Backport of upstream commit 5858e42c539d (gh-143927 / GH-143929) via the 3.10 backport 12dcbd74d356; applies to 3.7.3 with line offsets only. Bundles the upstream regression test test_crlf_normalization (test_configparser.py). - CVE-2026-0864
- Products
- idle-python3.7, libpython3.7, libpython3.7-dev, libpython3.7-minimal, libpython3.7-stdlib, libpython3.7-testsuite, python3.7, python3.7-dev, python3.7-doc, python3.7-examples, python3.7-minimal, python3.7-venv
- Affected versions
- Not specified
- Fixed versions
- 3.7.3-2+deb10u7+tuxcare.els7
- CVEs
- CVE-2026-0864
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:22 UTC · Revision 1
Source evidence
* SECURITY UPDATE: configuration injection in configparser via a carriage return in an attacker-controlled written value - debian/patches/CVE-2026-0864.patch: in Lib/configparser.py, normalize CR and CRLF to LF before indenting continuation lines in RawConfigParser._write_section(), so a bare carriage return inside a written value can no longer round-trip into an unindented line that the parser reads back as a separate "key = value" pair. Backport of upstream commit 5858e42c539d (gh-143927 / GH-143929) via the 3.10 backport 12dcbd74d356; applies to 3.7.3 with line offsets only. Bundles the upstream regression test test_crlf_normalization (test_configparser.py). - CVE-2026-0864
osv:CLSA-2026-1787660038
idle-python3.7
Fixed versions: 3.7.3-2+deb10u7+tuxcare.els7
libpython3.7
Fixed versions: 3.7.3-2+deb10u7+tuxcare.els7
libpython3.7-dev
Fixed versions: 3.7.3-2+deb10u7+tuxcare.els7
libpython3.7-minimal
Fixed versions: 3.7.3-2+deb10u7+tuxcare.els7
libpython3.7-stdlib
Fixed versions: 3.7.3-2+deb10u7+tuxcare.els7
libpython3.7-testsuite
Fixed versions: 3.7.3-2+deb10u7+tuxcare.els7
python3.7
Fixed versions: 3.7.3-2+deb10u7+tuxcare.els7
python3.7-dev
Fixed versions: 3.7.3-2+deb10u7+tuxcare.els7
python3.7-doc
Fixed versions: 3.7.3-2+deb10u7+tuxcare.els7
python3.7-examples
Fixed versions: 3.7.3-2+deb10u7+tuxcare.els7
python3.7-minimal
Fixed versions: 3.7.3-2+deb10u7+tuxcare.els7
python3.7-venv
Fixed versions: 3.7.3-2+deb10u7+tuxcare.els7
Complete source record
{
"id": "8c64c1dac116bbb216e326dbea34734b5fb20814bdcf4bfa7c6dc4f7f7320b6b",
"url": "https://osv.dev/vulnerability/CLSA-2026-1787660038",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fix CVE(s): CVE-2026-0864",
"summary": "* SECURITY UPDATE: configuration injection in configparser via a carriage return in an attacker-controlled written value - debian/patches/CVE-2026-0864.patch: in Lib/configparser.py, normalize CR and CRLF to LF before indenting continuation lines in RawConfigParser._write_section(), so a bare carriage return inside a written value can no longer round-trip into an unindented line that the parser reads back as a separate \"key = value\" pair. Backport of upstream commit 5858e42c539d (gh-143927 / GH-143929) via the 3.10 backport 12dcbd74d356; applies to 3.7.3 with line offsets only. Bundles the upstream regression test test_crlf_normalization (test_configparser.py). - CVE-2026-0864",
"evidence": "osv:CLSA-2026-1787660038",
"products": [
{
"name": {
"value": "idle-python3.7",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.7.3-2+deb10u7+tuxcare.els7",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libpython3.7",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.7.3-2+deb10u7+tuxcare.els7",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libpython3.7-dev",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.7.3-2+deb10u7+tuxcare.els7",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libpython3.7-minimal",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.7.3-2+deb10u7+tuxcare.els7",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libpython3.7-stdlib",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.7.3-2+deb10u7+tuxcare.els7",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libpython3.7-testsuite",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.7.3-2+deb10u7+tuxcare.els7",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.7",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.7.3-2+deb10u7+tuxcare.els7",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.7-dev",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.7.3-2+deb10u7+tuxcare.els7",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.7-doc",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.7.3-2+deb10u7+tuxcare.els7",
"evidence": "/affected/8/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.7-examples",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.7.3-2+deb10u7+tuxcare.els7",
"evidence": "/affected/9/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.7-minimal",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.7.3-2+deb10u7+tuxcare.els7",
"evidence": "/affected/10/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python3.7-venv",
"evidence": "/affected/11/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.7.3-2+deb10u7+tuxcare.els7",
"evidence": "/affected/11/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1787660038",
"aliases": [
"CLSA-2026-1787660038"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.3-2+deb10u7+tuxcare.els7"
}
]
}
],
"package": {
"name": "idle-python3.7",
"purl": "pkg:deb/tuxcare/idle-python3.7?distro=debian-10",
"ecosystem": "TuxCare:Debian:10"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787660038.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.3-2+deb10u7+tuxcare.els7"
}
]
}
],
"package": {
"name": "libpython3.7",
"purl": "pkg:deb/tuxcare/libpython3.7?distro=debian-10",
"ecosystem": "TuxCare:Debian:10"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787660038.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.3-2+deb10u7+tuxcare.els7"
}
]
}
],
"package": {
"name": "libpython3.7-dev",
"purl": "pkg:deb/tuxcare/libpython3.7-dev?distro=debian-10",
"ecosystem": "TuxCare:Debian:10"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787660038.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.3-2+deb10u7+tuxcare.els7"
}
]
}
],
"package": {
"name": "libpython3.7-minimal",
"purl": "pkg:deb/tuxcare/libpython3.7-minimal?distro=debian-10",
"ecosystem": "TuxCare:Debian:10"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787660038.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.3-2+deb10u7+tuxcare.els7"
}
]
}
],
"package": {
"name": "libpython3.7-stdlib",
"purl": "pkg:deb/tuxcare/libpython3.7-stdlib?distro=debian-10",
"ecosystem": "TuxCare:Debian:10"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787660038.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.3-2+deb10u7+tuxcare.els7"
}
]
}
],
"package": {
"name": "libpython3.7-testsuite",
"purl": "pkg:deb/tuxcare/libpython3.7-testsuite?distro=debian-10",
"ecosystem": "TuxCare:Debian:10"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787660038.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.3-2+deb10u7+tuxcare.els7"
}
]
}
],
"package": {
"name": "python3.7",
"purl": "pkg:deb/tuxcare/python3.7?distro=debian-10",
"ecosystem": "TuxCare:Debian:10"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787660038.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.3-2+deb10u7+tuxcare.els7"
}
]
}
],
"package": {
"name": "python3.7-dev",
"purl": "pkg:deb/tuxcare/python3.7-dev?distro=debian-10",
"ecosystem": "TuxCare:Debian:10"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787660038.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.3-2+deb10u7+tuxcare.els7"
}
]
}
],
"package": {
"name": "python3.7-doc",
"purl": "pkg:deb/tuxcare/python3.7-doc?distro=debian-10",
"ecosystem": "TuxCare:Debian:10"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787660038.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.3-2+deb10u7+tuxcare.els7"
}
]
}
],
"package": {
"name": "python3.7-examples",
"purl": "pkg:deb/tuxcare/python3.7-examples?distro=debian-10",
"ecosystem": "TuxCare:Debian:10"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787660038.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.3-2+deb10u7+tuxcare.els7"
}
]
}
],
"package": {
"name": "python3.7-minimal",
"purl": "pkg:deb/tuxcare/python3.7-minimal?distro=debian-10",
"ecosystem": "TuxCare:Debian:10"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787660038.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.3-2+deb10u7+tuxcare.els7"
}
]
}
],
"package": {
"name": "python3.7-venv",
"purl": "pkg:deb/tuxcare/python3.7-venv?distro=debian-10",
"ecosystem": "TuxCare:Debian:10"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787660038.json"
}
}
],
"modified": "2026-10-26T09:31:52.829998473Z",
"provider": "osv",
"upstream": [
"CVE-2026-0864"
],
"references": [
"https://errata.tuxcare.com/els_os/debian10els/CLSA-2026-1787660038.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": 448805,
"published_at": "2026-08-25T12:14:10+00:00"
}