{
"id": "GHSA-fc8x-2rww-xw9m",
"aliases": [
"CVE-2026-82398"
],
"details": "### Impact\nAn attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires a call to `read_until_whitespace` with an input which does not have whitespace for a long time.\n\n### Patches\nThis has been fixed in [pypdf==6.15.0](https://github.com/py-pdf/pypdf/releases/tag/6.15.0).\n\n### Workarounds\nIf you cannot upgrade yet, consider applying the changes from PR [#3947](https://github.com/py-pdf/pypdf/pull/3947).",
"summary": "pypdf: Inefficient handling of non-whitespace inputs in read_until_whitespace",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.15.0"
}
]
}
],
"package": {
"name": "pypdf",
"ecosystem": "PyPI"
}
}
],
"modified": "2026-09-02T14:38:12Z",
"severity": [
{
"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"
}
],
"published": "2026-09-02T14:38:12Z",
"references": [
{
"url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-fc8x-2rww-xw9m",
"type": "WEB"
},
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82398",
"type": "ADVISORY"
},
{
"url": "https://github.com/py-pdf/pypdf/pull/3947",
"type": "WEB"
},
{
"url": "https://github.com/py-pdf/pypdf/commit/4959848e057e37c218dccad7465259210923faaa",
"type": "WEB"
},
{
"url": "https://github.com/py-pdf/pypdf",
"type": "PACKAGE"
},
{
"url": "https://github.com/py-pdf/pypdf/releases/tag/6.15.0",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-407"
],
"severity": "MODERATE",
"github_reviewed": true,
"nvd_published_at": "2026-08-31T22:17:23Z",
"github_reviewed_at": "2026-09-02T14:38:12Z"
}
}