MediumFix available
pypdf, pypdf2 — security advisory
pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting text in layout mode with large character offsets. This vulnerability is fixed in 6.12.0.
- Products
- pypdf, pypdf2
- Affected versions
- 2.12.1-3, 2.12.1-3+deb12u1, 2.12.1-4, 3.17.4-1, 3.4.1-1, 3.4.1-1+deb12u1, 4.0.0-1, 4.0.0-1~exp1, 4.0.1-1, 4.0.2-1, 4.1.0-1, 4.2.0-1, 4.3.1-1, 5.4.0-1, 6.19.0-1, 6.9.0-1, 6.9.2-1, 6.9.2-2
- Fixed versions
- 6.19.0-1
- CVEs
- CVE-2026-48155
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 16:20 UTC · Revision 1
Source evidence
pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting text in layout mode with large character offsets. This vulnerability is fixed in 6.12.0.
osv:DEBIAN-CVE-2026-48155
pypdf
Fixed versions: Not specified
pypdf
Fixed versions: Not specified
pypdf
Fixed versions: 6.19.0-1
pypdf2
Fixed versions: Not specified
Complete source record
{
"id": "66e170969e105d5886a248a6593690b97a75b4562b1d21e694503030ec967461",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-48155",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-48155",
"summary": "pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting text in layout mode with large character offsets. This vulnerability is fixed in 6.12.0.",
"evidence": "osv:DEBIAN-CVE-2026-48155",
"products": [
{
"name": {
"value": "pypdf",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.17.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.4.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.4.1-1+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "4.0.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.0.0-1~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "4.0.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.0.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.1.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.2.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.3.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "5.4.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.19.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.9.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.9.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.9.2-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "pypdf",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.4.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.19.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.9.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.9.2-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.9.2-2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "pypdf",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "6.19.0-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "5.4.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "6.9.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "6.9.2-1",
"evidence": "/affected/2/versions"
},
{
"value": "6.9.2-2",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "pypdf2",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.12.1-3",
"evidence": "/affected/3/versions"
},
{
"value": "2.12.1-3+deb12u1",
"evidence": "/affected/3/versions"
},
{
"value": "2.12.1-4",
"evidence": "/affected/3/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-48155",
"aliases": [
"DEBIAN-CVE-2026-48155"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "pypdf",
"purl": "pkg:deb/debian/pypdf?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"3.17.4-1",
"3.4.1-1",
"3.4.1-1+deb12u1",
"4.0.0-1",
"4.0.0-1~exp1",
"4.0.1-1",
"4.0.2-1",
"4.1.0-1",
"4.2.0-1",
"4.3.1-1",
"5.4.0-1",
"6.19.0-1",
"6.9.0-1",
"6.9.2-1",
"6.9.2-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48155.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "pypdf",
"purl": "pkg:deb/debian/pypdf?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"5.4.0-1",
"6.19.0-1",
"6.9.0-1",
"6.9.2-1",
"6.9.2-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48155.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.19.0-1"
}
]
}
],
"package": {
"name": "pypdf",
"purl": "pkg:deb/debian/pypdf?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"5.4.0-1",
"6.9.0-1",
"6.9.2-1",
"6.9.2-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48155.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "pypdf2",
"purl": "pkg:deb/debian/pypdf2?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.12.1-3",
"2.12.1-3+deb12u1",
"2.12.1-4"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48155.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-15T09:47:30.143817295Z",
"provider": "osv",
"upstream": [
"CVE-2026-48155"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-48155"
]
},
"related_cves": [
{
"value": "CVE-2026-48155",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 327534,
"published_at": "2026-05-28T16:16:28.89+00:00"
}