Medium severityNVD Advisory· Published Oct 21, 2026

CVE-2026-113791

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF containing a content stream with many small operations, causing parsing to consume large amounts of memory. This issue is fixed in version 6.21.0.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Py PDF/Pypdfllm-fuzzy
Range: <6.21.0

Patches

Vulnerability mechanics

References

github.com/py-pdf/pypdf/commit/18bd2981a74479483a0b9507602c58a63d6c9b12nvd
github.com/py-pdf/pypdf/pull/4218nvd
github.com/py-pdf/pypdf/releases/tag/6.21.0nvd
github.com/py-pdf/pypdf/security/advisories/GHSA-cgf9-327m-v77cnvd

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cvss	0.260
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000