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vuln-cve/data/2026/96xxx/CVE-2026-96640.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-96640",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-09-23T14:35:50.130Z",
"datePublished": "2026-10-21T21:03:22.785Z",
"dateUpdated": "2026-10-28T01:57:01.680Z"
},
"containers": {
"cna": {
"title": "Pillow PDF append accepts malformed shared page-tree DAG causing resource exhaustion",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"lang": "en",
"description": "CWE-400: Uncontrolled Resource Consumption",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-407",
"lang": "en",
"description": "CWE-407: Inefficient Algorithmic Complexity",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "HIGH",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0"
}
}
],
"references": [
{
"name": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-mrfp-p49p-3hf2",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-mrfp-p49p-3hf2"
},
{
"name": "https://github.com/python-pillow/Pillow/pull/10093",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/python-pillow/Pillow/pull/10093"
},
{
"name": "https://github.com/python-pillow/Pillow/commit/6f0e7ee1f9c2fe227906f8a4b926e6622b702bc7",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/python-pillow/Pillow/commit/6f0e7ee1f9c2fe227906f8a4b926e6622b702bc7"
},
{
"name": "https://github.com/python-pillow/Pillow/releases/tag/13.0.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/python-pillow/Pillow/releases/tag/13.0.0"
}
],
"affected": [
{
"vendor": "python-pillow",
"product": "Pillow",
"versions": [
{
"version": ">= 5.1.0, < 13.0.0",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-10-21T21:03:22.785Z"
},
"descriptions": [
{
"lang": "en",
"value": "Pillow is a Python imaging library. From 5.1.0 until 13.0.0, PdfParser.linearize_page_tree() in src/PIL/PdfParser.py treats a PDF /Pages graph as a tree without tracking duplicate indirect references. When Image.save(..., format=\"PDF\", append=True) processes an attacker-controlled existing PDF whose /Kids arrays repeatedly reference the same child /Pages node, Pillow expands the shared subtree as distinct pages. A compact malformed PDF can therefore create exponentially many page references and consume disproportionate CPU before the append completes. This issue is fixed in version 13.0.0."
}
],
"source": {
"advisory": "GHSA-mrfp-p49p-3hf2",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-mrfp-p49p-3hf2",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-10-28T01:56:31.079893Z",
"id": "CVE-2026-96640",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-10-28T01:57:01.680Z"
}
}
]
}
}