Bug 2530660 (CVE-2026-86776)

Summary: CVE-2026-86776 KeePass: KeePass: Denial of Service via crafted KDBX file
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: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in KeePass. An attacker can craft a malicious KDBX file that declares excessively large header field lengths. When a user opens this file, the application attempts to allocate gigabytes of memory, leading to resource exhaustion and causing the application to terminate. This vulnerability can result in a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2530809, 2530810    
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Description OSIDB Bzimport 2026-09-09 10:24:08 UTC
KeePass versions 2.35 through 2.61.1 fail to validate KDBX header field sizes before memory allocation in the ReadHeaderField function. Attackers can craft a malicious KDBX file declaring excessive header field lengths to trigger allocation of gigabytes of memory, causing the application to consume resources and terminate.