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CVE-2026-86776 (GCVE-0-2026-86776)

Vulnerability from cvelistv5 – Published: 2026-09-09 10:07 – Updated: 2026-09-10 14:58

Title

KeePass 2.35 through 2.61.1 Memory Exhaustion via KDBX Header Field Size

Summary

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.

Severity

3.3 (Low)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

4.6 (Medium)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-10 13:48 UTC

CWE

CWE-789 - Memory Allocation with Excessive Size Value

Assigner

VulnCheck CNA

References

4 references

URL	Tags
https://github.com/KSecur1ty/KDBX-Header-Size-Mir…	exploittechnical-description
https://keepass.info/	product
https://keepass.info/download.html	product
https://www.vulncheck.com/advisories/keepass-2.35…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
KeePass	KeePass	Affected: 2.35 , ≤ 2.61.1 (custom) cpe:2.3:a:keepass:keepass::::::::

Date Public

2026-08-13 00:00

Credits

KSecur1ty

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-86776",
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                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
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        "providerMetadata": {
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CVE-2020-37178 (GCVE-0-2020-37178)

Vulnerability from cvelistv5 – Published: 2026-02-11 20:37 – Updated: 2026-03-05 01:28

Title

KeePass 2.44 - Denial of Service (PoC)

Summary

KeePass Password Safe versions before 2.44 contain a denial of service vulnerability in the help system's HTML handling. Attackers can trigger the vulnerability by dragging and dropping malicious HTML files into the help area, potentially causing application instability or crash.

Severity

4.6 (Medium)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial