CVE-2026-86776

KeePass 2.35 through 2.61.1 Memory Exhaustion via KDBX Header Field Size

CVE-2026-86776 has no fix on record yet for 1 affected product. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

4.6

No vendor severity

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0017

6th percentile

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.

Where it's fixed

Product	Fixed in	Fix	Released
No fix yet
KeePass (Windows apps)	No fix yet	no-fix	n/a

Details

Published
September 9, 2026
Weakness
CWE-789: Memory Allocation with Excessive Size Value
Vendor advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-86776

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