MediumFix available
pypdf, pypdf2 — security advisory
pypdf is a free and open-source pure-python PDF library. Prior to 6.20.1, calling PdfWriter.find_outline_item on a crafted PDF with a cyclic outline hierarchy can enter an infinite loop and block the current process. This issue is fixed in version 6.20.1.
- 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, 6.21.0-1, 6.21.1-1, 6.9.0-1, 6.9.2-1, 6.9.2-2
- Fixed versions
- 6.21.0-1
- CVEs
- CVE-2026-113792
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:05 UTC · Revision 1
Source evidence
pypdf is a free and open-source pure-python PDF library. Prior to 6.20.1, calling PdfWriter.find_outline_item on a crafted PDF with a cyclic outline hierarchy can enter an infinite loop and block the current process. This issue is fixed in version 6.20.1.
osv:DEBIAN-CVE-2026-113792
pypdf
Fixed versions: Not specified
pypdf
Fixed versions: Not specified
pypdf
Fixed versions: 6.21.0-1
pypdf2
Fixed versions: Not specified
Complete source record
{
"id": "621f80a7e3b8bd03365b40e5ee45916dc111c777983e166022ca0ff2adf9a522",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-113792",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-113792",
"summary": "pypdf is a free and open-source pure-python PDF library. Prior to 6.20.1, calling PdfWriter.find_outline_item on a crafted PDF with a cyclic outline hierarchy can enter an infinite loop and block the current process. This issue is fixed in version 6.20.1.",
"evidence": "osv:DEBIAN-CVE-2026-113792",
"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": "6.21.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "6.21.1-1",
"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": "6.21.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.21.1-1",
"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": "6.21.0-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "5.4.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "6.19.0-1",
"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-2026-113792",
"aliases": [
"DEBIAN-CVE-2026-113792"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
}
],
"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",
"6.21.0-1",
"6.21.1-1",
"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-2026-113792.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",
"6.21.0-1",
"6.21.1-1",
"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-2026-113792.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.21.0-1"
}
]
}
],
"package": {
"name": "pypdf",
"purl": "pkg:deb/debian/pypdf?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"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-2026-113792.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-2026-113792.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-24T09:47:26.923617127Z",
"provider": "osv",
"upstream": [
"CVE-2026-113792"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-113792"
]
},
"related_cves": [
{
"value": "CVE-2026-113792",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 428959,
"published_at": "2026-10-21T16:17:27.173+00:00"
}