Low severity3.3NVD Advisory· Published Sep 9, 2026

CVE-2026-86776

Description

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.

Affected products

Keepass/Keepassllm-fuzzy
Range: 2.35 - 2.61.1
Ksecur1ty/Kdbx Header Size Mirage Pocreferences

Patches

Vulnerability mechanics

References

keepass.infonvd
keepass.info/download.htmlnvd
www.vulncheck.com/advisories/keepass-2.35-through-2.61.1-memory-exhaustion-via-kdbx-header-field-sizenvd

News mentions

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