Medium 6.5Published Apr 22, 2026

CVE-2026-41312pypdf is a free and open-source pure-python PDF library.

Updated under an hour ago (2026-10-19 06:10 UTC)

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It affects pypdf_project pypdf. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for pypdf_project pypdf

Exploited in the last 30 days

pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to the RAM being exhausted. This requires accessing a stream compressed using `/FlateDecode` with a `/Predictor` unequal 1 and large predictor parameters. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.

CVSS: 6.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-789
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

pypdf_project pypdf pypdf_project:pypdf	before 6.10.2	NVD

References

https://github.com/py-pdf/pypdf/commit/ac734dab4eef92bcce50d503949b4d9887d89f11patch
https://github.com/py-pdf/pypdf/pull/3734issue-tracking, patch
https://github.com/py-pdf/pypdf/releases/tag/6.10.2release-notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-7gw9-cf7v-778fpatch, vendor-advisory

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.