{"id":"CVE-2026-103000","published":"2026-09-30T21:17:07.490","lastModified":"2026-10-05T15:03:11.473","description":"pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF can provide unusually large alphabetical page-label values that cause pypdf/_page_labels.py to generate strings beyond a reasonable page-label length when an application retrieves document page labels, consuming excessive memory and potentially making the application unavailable. This issue is fixed in version 6.19.0.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-400"],"vendors":["pypdf project"],"products":["pypdf"],"references":[{"url":"https://github.com/py-pdf/pypdf/commit/0d8b5a8832cde1ba308b5c27567b879b7b7eed4a","tags":["Patch"]},{"url":"https://github.com/py-pdf/pypdf/pull/4096","tags":["Patch","Issue Tracking"]},{"url":"https://github.com/py-pdf/pypdf/releases/tag/6.19.0","tags":["Release Notes"]},{"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-w23x-9jrw-r45c","tags":["Vendor Advisory"]}],"exploitRefs":[{"url":"https://github.com/py-pdf/pypdf/commit/0d8b5a8832cde1ba308b5c27567b879b7b7eed4a","tags":["Patch"]},{"url":"https://github.com/py-pdf/pypdf/pull/4096","tags":["Patch","Issue Tracking"]},{"url":"https://github.com/py-pdf/pypdf/releases/tag/6.19.0","tags":["Release Notes"]},{"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-w23x-9jrw-r45c","tags":["Vendor Advisory"]}],"hasPoc":true,"ai":{"summary":"A crafted PDF file can cause pypdf to consume excessive memory when retrieving page labels, potentially leading to application unavailability. This vulnerability affects versions prior to 6.19.0.","exploitability":"Exploitation is relatively straightforward as it requires only a malicious PDF file to be processed by an application using pypdf, with no additional preconditions needed.","blast_radius":"The impact could be significant in environments where PDF processing is common, potentially causing denial of service across multiple applications that use pypdf for PDF handling.","remediation":"Upgrade to pypdf version 6.19.0 or later to remediate this memory exhaustion vulnerability.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["memory-exhaustion","pdf","denial-of-service"],"model":"garnet-coder","analyzedAt":"2026-10-13T09:07:05.360Z"}}