Medium
pypdf, pypdf2 — security advisory
pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with declared image size values that are much too large compared to the actual data, causing large memory usage in pypdf image parsing. This issue is fixed in version 6.14.0.
- Products
- pypdf, pypdf2
- 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, 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-2026-59938
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:44 UTC · Revision 1
Source evidence
pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with declared image size values that are much too large compared to the actual data, causing large memory usage in pypdf image parsing. This issue is fixed in version 6.14.0.
osv:UBUNTU-CVE-2026-59938
pypdf2
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": "deb88f79e92e9db06c23b37369e2d43411f221ac5db146b6ae4f763e0591341f",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-59938",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-59938",
"summary": "pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with declared image size values that are much too large compared to the actual data, causing large memory usage in pypdf image parsing. This issue is fixed in version 6.14.0.",
"evidence": "osv:UBUNTU-CVE-2026-59938",
"products": [
{
"name": {
"value": "pypdf2",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.23+git20141008-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.25.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.25.1-1ubuntu0.1~esm1",
"evidence": "/affected/0/versions"
},
{
"value": "1.25.1-1ubuntu0.1~esm2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.26.0-2",
"evidence": "/affected/1/versions"
},
{
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"evidence": "/affected/1/versions"
},
{
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"evidence": "/affected/1/versions"
}
]
},
{
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"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.26.0-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.0-3ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.0-3ubuntu1.20.04.1",
"evidence": "/affected/2/versions"
},
{
"value": "1.26.0-3ubuntu1.20.04.2",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
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"evidence": "/affected/3/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/3/versions"
},
{
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"evidence": "/affected/3/versions"
},
{
"value": "1.26.0-4ubuntu0.22.04.2",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.4.1-1",
"evidence": "/affected/4/versions"
},
{
"value": "3.17.4-1",
"evidence": "/affected/4/versions"
},
{
"value": "4.0.0-1",
"evidence": "/affected/4/versions"
},
{
"value": "4.0.1-1",
"evidence": "/affected/4/versions"
},
{
"value": "4.0.2-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
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"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
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"evidence": "/affected/5/versions"
},
{
"value": "2.12.1-4",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "pypdf",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.3.1-1",
"evidence": "/affected/6/versions"
},
{
"value": "5.4.0-1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "pypdf",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.9.2-1",
"evidence": "/affected/7/versions"
},
{
"value": "6.9.2-2",
"evidence": "/affected/7/versions"
}
]
},
{
"name": {
"value": "pypdf",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.4.0-1",
"evidence": "/affected/8/versions"
},
{
"value": "6.9.2-1",
"evidence": "/affected/8/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-59938",
"aliases": [
"UBUNTU-CVE-2026-59938"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "pypdf2",
"purl": "pkg:deb/ubuntu/pypdf2?arch=source&distro=esm-apps%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"1.23+git20141008-1",
"1.25.1-1",
"1.25.1-1ubuntu0.1~esm1",
"1.25.1-1ubuntu0.1~esm2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59938.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python-pypdf2",
"binary_version": "1.25.1-1ubuntu0.1~esm2"
},
{
"binary_name": "python3-pypdf2",
"binary_version": "1.25.1-1ubuntu0.1~esm2"
}
]
}
},
{
"ranges": [
{
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"events": [
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],
"package": {
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"purl": "pkg:deb/ubuntu/pypdf2?arch=source&distro=esm-apps%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"1.26.0-2",
"1.26.0-2ubuntu0.1~esm1",
"1.26.0-2ubuntu0.1~esm2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59938.json"
},
"ecosystem_specific": {
"binaries": [
{
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"binary_version": "1.26.0-2ubuntu0.1~esm2"
},
{
"binary_name": "python3-pypdf2",
"binary_version": "1.26.0-2ubuntu0.1~esm2"
}
]
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{
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],
"package": {
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"purl": "pkg:deb/ubuntu/pypdf2?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"1.26.0-2",
"1.26.0-3ubuntu1",
"1.26.0-3ubuntu1.20.04.1",
"1.26.0-3ubuntu1.20.04.2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59938.json"
},
"ecosystem_specific": {
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{
"binary_name": "python-pypdf2",
"binary_version": "1.26.0-3ubuntu1.20.04.2"
},
{
"binary_name": "python3-pypdf2",
"binary_version": "1.26.0-3ubuntu1.20.04.2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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}
]
}
],
"package": {
"name": "pypdf2",
"purl": "pkg:deb/ubuntu/pypdf2?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"1.26.0-4",
"1.26.0-4ubuntu0.22.04.1",
"1.26.0-4ubuntu0.22.04.2"
],
"database_specific": {
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},
"ecosystem_specific": {
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{
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},
{
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"purl": "pkg:deb/ubuntu/pypdf?arch=source&distro=noble",
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},
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"3.17.4-1",
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},
"versions": [
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"2.12.1-4"
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"ecosystem": "Ubuntu:26.04:LTS"
},
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],
"database_specific": {
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{
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],
"modified": "2026-10-17T12:56:00.571313028Z",
"provider": "osv",
"upstream": [
"CVE-2026-59938"
],
"references": [
"https://ubuntu.com/security/CVE-2026-59938",
"https://www.cve.org/CVERecord?id=CVE-2026-59938",
"https://github.com/py-pdf/pypdf/security/advisories/GHSA-5qjq-93h5-hrgp",
"https://github.com/py-pdf/pypdf/pull/3888"
]
},
"related_cves": [
{
"value": "CVE-2026-59938",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 354549,
"published_at": "2026-07-08T18:16:00+00:00"
}