High
pypdf: Possible long runtimes for large xref table header limits
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF with a standard cross-reference table whose declared entry count exceeds what the file can contain, causing excessive processing and long runtimes when the file is opened. This issue is fixed in version 6.21.2.
Announced Group revision 1
Original source ↗CVE-2026-115580
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-115580
pypdf
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "py-pdf",
"product": "pypdf",
"versions": [
{
"status": "affected",
"version": "< 6.21.2"
}
]
}
]- Related CVEs
- CVE-2026-115580
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #53160 · Revision 1
- Added to Heist Feed
- Publisher date