Bug 2445118 (CVE-2026-28804)

Summary: CVE-2026-28804 pypdf: pypdf: Denial of Service via crafted PDF with ASCIIHexDecode filter
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, bparees, hasun, jfula, jkoehler, jowilson, jwong, lphiri, nyancey, omaciel, ometelka, ptisnovs, syedriko, teagle, ttakamiy, xdharmai
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in pypdf, a pure-python PDF library. A remote attacker can exploit this vulnerability by crafting a malicious PDF file that utilizes the /ASCIIHexDecode filter. Processing this specially crafted PDF can lead to excessively long runtimes, resulting in a Denial of Service (DoS) for the application or system processing the file.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-03-06 07:02:06 UTC
pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.