High 8.7Published Sep 30, 2026

CVE-2026-102993pypdf: Possible large memory usage when retrieving Roman page labels

Updated under an hour ago (Oct 28, 2026, 3:30 AM ET)

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It affects py-pdf pypdf and 1 other product. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.35%, higher than 27% of scored CVEs.

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Every CVE for py-pdf pypdf

Exploited in the last 30 days

pypdf is a free and open-source pure-python PDF library. Prior to 6.17.0, a crafted PDF can provide unusually large Roman page-label values that cause pypdf/_page_labels.py to generate excessively large numeral strings when an application retrieves document page labels, consuming large amounts of memory and potentially making the application unavailable. This issue is fixed in version 6.17.0.

CVSS: 8.7 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-400, CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.35% (percentile 27)
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Oct 2, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

py-pdf pypdf py_pdf:pypdf (from the name)	before 6.17.0	CNA record
pypdf_project pypdf pypdf_project:pypdf	before 6.17.0	NVD

References

References

https://github.com/py-pdf/pypdf/security/advisories/GHSA-qv6h-rv94-w285	x-refsource-confirm, patch, vendor-advisory
https://github.com/py-pdf/pypdf/pull/4047	x-refsource-misc, patch
https://github.com/py-pdf/pypdf/commit/89db7c4fe9315ecc964bfdf05a4e8c4b94175163	x-refsource-misc, patch
https://github.com/py-pdf/pypdf/releases/tag/6.17.0	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.