HighFix available
libtext-csv-xs-perl — security advisory
Text::CSV_XS versions before 1.65 for Perl allow quadratic CPU use by copying the unparsed remainder per record of CR-only input in getline. With eol unset, the default, getline reads with Perl's default line separator, so input with CR-only line endings arrives as one chunk. After each record the parser copies the whole unparsed remainder into a new buffer, which the next call parses and copies again, so the work grows with the square of the input size. A reader with default options that is sent CSV with classic Mac line endings spends seconds of CPU time on a megabyte of input.
- Products
- libtext-csv-xs-perl
- Affected versions
- 1.49-1, 1.49-1+deb12u1, 1.50-1, 1.51-1, 1.52-1, 1.53-1, 1.54-1, 1.55-1, 1.56-1, 1.57-1, 1.59-1, 1.60-1, 1.60-1+deb13u1, 1.61-1, 1.62-1, 1.64-1, 1.65-1
- Fixed versions
- 1.65-1
- CVEs
- CVE-2026-110755
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 02:05 UTC · Revision 1
Source evidence
Text::CSV_XS versions before 1.65 for Perl allow quadratic CPU use by copying the unparsed remainder per record of CR-only input in getline. With eol unset, the default, getline reads with Perl's default line separator, so input with CR-only line endings arrives as one chunk. After each record the parser copies the whole unparsed remainder into a new buffer, which the next call parses and copies again, so the work grows with the square of the input size. A reader with default options that is sent CSV with classic Mac line endings spends seconds of CPU time on a megabyte of input.
osv:DEBIAN-CVE-2026-110755
libtext-csv-xs-perl
Fixed versions: Not specified
libtext-csv-xs-perl
Fixed versions: Not specified
libtext-csv-xs-perl
Fixed versions: 1.65-1
Complete source record
{
"id": "5009d115fe2fb4545922c88d23903adc9de7ba1c277dd190ada5a7a1dba1c955",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-110755",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-110755",
"summary": "Text::CSV_XS versions before 1.65 for Perl allow quadratic CPU use by copying the unparsed remainder per record of CR-only input in getline. With eol unset, the default, getline reads with Perl's default line separator, so input with CR-only line endings arrives as one chunk. After each record the parser copies the whole unparsed remainder into a new buffer, which the next call parses and copies again, so the work grows with the square of the input size. A reader with default options that is sent CSV with classic Mac line endings spends seconds of CPU time on a megabyte of input.",
"evidence": "osv:DEBIAN-CVE-2026-110755",
"products": [
{
"name": {
"value": "libtext-csv-xs-perl",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.49-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.49-1+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "1.50-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.51-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.52-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.53-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.54-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.55-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.56-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.57-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.59-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.60-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.61-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.62-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.64-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.65-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "libtext-csv-xs-perl",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.60-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.60-1+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "1.61-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.62-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.64-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.65-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "libtext-csv-xs-perl",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.65-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "1.60-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.61-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.62-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.64-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2026-110755",
"aliases": [
"DEBIAN-CVE-2026-110755"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libtext-csv-xs-perl",
"purl": "pkg:deb/debian/libtext-csv-xs-perl?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.49-1",
"1.49-1+deb12u1",
"1.50-1",
"1.51-1",
"1.52-1",
"1.53-1",
"1.54-1",
"1.55-1",
"1.56-1",
"1.57-1",
"1.59-1",
"1.60-1",
"1.61-1",
"1.62-1",
"1.64-1",
"1.65-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-110755.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libtext-csv-xs-perl",
"purl": "pkg:deb/debian/libtext-csv-xs-perl?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.60-1",
"1.60-1+deb13u1",
"1.61-1",
"1.62-1",
"1.64-1",
"1.65-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-110755.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.65-1"
}
]
}
],
"package": {
"name": "libtext-csv-xs-perl",
"purl": "pkg:deb/debian/libtext-csv-xs-perl?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.60-1",
"1.61-1",
"1.62-1",
"1.64-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-110755.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-23T18:05:32.271812836Z",
"provider": "osv",
"upstream": [
"CVE-2026-110755"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-110755"
]
},
"related_cves": [
{
"value": "CVE-2026-110755",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 424482,
"published_at": "2026-10-16T23:17:00.74+00:00"
}