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vuln-cve/data/2026/82xxx/CVE-2026-82398.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-82398",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-08-28T22:00:43.512Z",
"datePublished": "2026-08-31T21:41:10.272Z",
"dateUpdated": "2026-09-01T14:57:30.866Z"
},
"containers": {
"cna": {
"title": "pypdf: Inefficient handling of non-whitespace inputs in read_until_whitespace",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-407",
"lang": "en",
"description": "CWE-407: Inefficient Algorithmic Complexity",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "LOW",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"vectorString": "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",
"version": "4.0"
}
}
],
"references": [
{
"name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-fc8x-2rww-xw9m",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-fc8x-2rww-xw9m"
},
{
"name": "https://github.com/py-pdf/pypdf/pull/3947",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/py-pdf/pypdf/pull/3947"
},
{
"name": "https://github.com/py-pdf/pypdf/commit/4959848e057e37c218dccad7465259210923faaa",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/py-pdf/pypdf/commit/4959848e057e37c218dccad7465259210923faaa"
},
{
"name": "https://github.com/py-pdf/pypdf/releases/tag/6.15.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/py-pdf/pypdf/releases/tag/6.15.0"
}
],
"affected": [
{
"vendor": "py-pdf",
"product": "pypdf",
"versions": [
{
"version": "< 6.15.0",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-08-31T21:41:10.272Z"
},
"descriptions": [
{
"lang": "en",
"value": "pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, an attacker can craft a PDF that causes long runtimes when the pypdf/_utils.py function read_until_whitespace reads a stream containing a long run of bytes without whitespace. The function repeatedly performs immutable bytes concatenation in a one-byte loop, causing quadratic processing cost for the long non-whitespace input. This issue is fixed in version 6.15.0."
}
],
"source": {
"advisory": "GHSA-fc8x-2rww-xw9m",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-09-01T14:18:26.492095Z",
"id": "CVE-2026-82398",
"options": [
{
"Exploitation": "none"
},
{
"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": "2026-09-01T14:57:30.866Z"
}
}
]
}
}