CVE-2026-102993pypdf: Possible large memory usage when retrieving Roman page labels
Updated under an hour ago ()
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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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Free account, 1 product
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
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
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-qv6h-rv94-w285x-refsource-confirm, patch, vendor-advisory
- https://github.com/py-pdf/pypdf/pull/4047x-refsource-misc, patch
- https://github.com/py-pdf/pypdf/commit/89db7c4fe9315ecc964bfdf05a4e8c4b94175163x-refsource-misc, patch
- https://github.com/py-pdf/pypdf/releases/tag/6.17.0x-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.