Medium
pypdf, pypdf2 and 1 more products — security advisory
pypdf is a free and open-source pure-python PDF library. Prior to 6.13.1, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires merging a file with threads/articles into a writer. This vulnerability is fixed in 6.13.1.
- Products
- pypdf, pypdf2, python-pypdf
- Affected versions
- 1.23+git20141008-1, 1.25.1-1, 1.25.1-1ubuntu0.1~esm1, 1.25.1-1ubuntu0.1~esm2, 1.26.0-2, 1.26.0-2ubuntu0.1~esm1, 1.26.0-2ubuntu0.1~esm2, 1.26.0-3ubuntu1, 1.26.0-3ubuntu1.20.04.1, 1.26.0-3ubuntu1.20.04.2, 1.26.0-4, 1.26.0-4ubuntu0.22.04.1, 1.26.0-4ubuntu0.22.04.2, 1:1.13-3, 2.12.1-3, 2.12.1-4, 3.17.4-1, 3.4.1-1, 4.0.0-1, 4.0.1-1, 4.0.2-1, 4.3.1-1, 5.4.0-1, 6.9.2-1, 6.9.2-2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-54651
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:09 UTC · Revision 1
Source evidence
pypdf is a free and open-source pure-python PDF library. Prior to 6.13.1, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires merging a file with threads/articles into a writer. This vulnerability is fixed in 6.13.1.
osv:UBUNTU-CVE-2026-54651
pypdf2
Fixed versions: Not specified
python-pypdf
Fixed versions: Not specified
pypdf2
Fixed versions: Not specified
pypdf2
Fixed versions: Not specified
pypdf2
Fixed versions: Not specified
pypdf
Fixed versions: Not specified
pypdf2
Fixed versions: Not specified
pypdf
Fixed versions: Not specified
pypdf
Fixed versions: Not specified
pypdf
Fixed versions: Not specified
Complete source record
{
"id": "4d7de55a5294a64bfbd2acca77748f7c77aaf87756f9ff99d8fcb25ce5dad35f",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-54651",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-54651",
"summary": "pypdf is a free and open-source pure-python PDF library. Prior to 6.13.1, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires merging a file with threads/articles into a writer. This vulnerability is fixed in 6.13.1.",
"evidence": "osv:UBUNTU-CVE-2026-54651",
"products": [
{
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},
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{
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"evidence": "/affected/0/versions"
},
{
"value": "1.25.1-1",
"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/6/versions"
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{
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"evidence": "/affected/6/versions"
}
]
},
{
"name": {
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"evidence": "/affected/7/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "4.3.1-1",
"evidence": "/affected/7/versions"
},
{
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"evidence": "/affected/7/versions"
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},
{
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},
{
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],
"severity": "medium",
"structured": {
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"aliases": [
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{
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},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
},
{
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},
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"1.25.1-1",
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"1.25.1-1ubuntu0.1~esm2"
],
"database_specific": {
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},
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},
"versions": [
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],
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},
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},
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],
"modified": "2026-10-17T13:00:26.846601393Z",
"provider": "osv",
"upstream": [
"CVE-2026-54651"
],
"references": [
"https://ubuntu.com/security/CVE-2026-54651",
"https://www.cve.org/CVERecord?id=CVE-2026-54651",
"https://github.com/py-pdf/pypdf/pull/3839",
"https://github.com/py-pdf/pypdf/releases/tag/6.13.1",
"https://github.com/py-pdf/pypdf/security/advisories/GHSA-g9xf-7f8q-9mcj"
]
},
"related_cves": [
{
"value": "CVE-2026-54651",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 360553,
"published_at": "2026-06-22T21:16:00+00:00"
}