Bug 2558353 (CVE-2026-113790)

Summary: CVE-2026-113790 pypdf: pypdf: Denial of Service via crafted PDF arrays and dictionaries
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: anpicker, bbrownin, blitton, doconnor, dschmidt, ebourniv, hasun, jfula, jlanda, jowilson, kshier, mbarnett, nyancey, ometelka, ptisnovs, rbobbitt, sbunciak, simaishi, stcannon, syedriko, xdharmai, yguenane
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in pypdf. A remote attacker can trigger a Denial of Service (DoS) by supplying a specially crafted PDF document containing arrays or dictionaries with an excessive number of elements. During parsing, the application consumes large amounts of memory, which can lead to resource exhaustion and service crashes.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-10-21 15:55:08 UTC
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF containing arrays or dictionaries with many elements, causing parsing to consume large amounts of memory. This issue is fixed in version 6.21.0.