Vulnerability-Lookup

CVE-2026-68765 (GCVE-0-2026-68765)

Vulnerability from cvelistv5 – Published: 2026-08-17 20:48 – Updated: 2026-08-21 11:20

Title

hashcat KeePass KDBX v4 Module Heap Buffer Overflow via Token Field

Summary

hashcat master branch builds after v7.1.2 contain a heap buffer overflow vulnerability in the KeePass AESKDF/KDBX v4 module (module 34301) that allows attackers to corrupt adjacent heap memory by supplying an oversized ninth hash field token. The module accepts up to 600 hex characters for the ninth token field but decodes it into a fixed 256-byte buffer with no length check, allowing a maximal input to write up to 44 bytes past the buffer boundary into adjacent esalt fields and heap chunk metadata, potentially enabling heap corruption or memory access violations.

Severity

5.2 (Medium)


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

6.1 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-18 15:16 UTC

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://github.com/hashcat/hashcat	productpatch
https://github.com/hashcat/hashcat/pull/4755	issue-tracking
https://github.com/hashcat/hashcat/commit/6f374c4…	patch
https://www.vulncheck.com/advisories/hashcat-keep…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
hashcat	hashcat	Affected: ef52453de9523f6a010652847b61cb340ed5daa5 , < 6f374c4ff7d5dc951530fbbbcf6b45e3c169b100 (git)	guessed

Date Public

2026-08-17 00:00

Credits

Piotr Kowalczyk

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-68765

Vulnerability from fkie_nvd - Published: 2026-08-17 21:16 - Updated: 2026-08-21 12:16

Severity

6.1 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/hashcat/hashcat
	disclosure@vulncheck.com	https://github.com/hashcat/hashcat/commit/6f374c4ff7d5dc951530fbbbcf6b45e3c169b100
	disclosure@vulncheck.com	https://github.com/hashcat/hashcat/pull/4755
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/hashcat-keepass-kdbx-v4-module-heap-buffer-overflow-via-token-field

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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      "description": [
        {
          "lang": "en",
          "value": "CWE-122"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-JFQQ-RFM8-8FRM

Vulnerability from github – Published: 2026-08-17 21:31 – Updated: 2026-08-17 21:31

Details

Severity

6.1 (Medium)


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

5.2 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-68765"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-122"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-17T21:16:48Z",
    "severity": "MODERATE"
  },
  "details": "hashcat master branch builds after v7.1.2 contain a heap buffer overflow vulnerability in the KeePass AESKDF/KDBX v4 module (module 34301) that allows attackers to corrupt adjacent heap memory by supplying an oversized ninth hash field token. The module accepts up to 600 hex characters for the ninth token field but decodes it into a fixed 256-byte buffer with no length check, allowing a maximal input to write up to 44 bytes past the buffer boundary into adjacent esalt fields and heap chunk metadata, potentially enabling heap corruption or memory access violations.",
  "id": "GHSA-jfqq-rfm8-8frm",
  "modified": "2026-08-17T21:31:26Z",
  "published": "2026-08-17T21:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68765"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hashcat/hashcat/pull/4755"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hashcat/hashcat/commit/6f374c4ff7d5dc951530fbbbcf6b45e3c169b100"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hashcat/hashcat"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/hashcat-keepass-kdbx-v4-module-heap-buffer-overflow-via-token-field"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

ubuntu-cve-2026-68765

Vulnerability from osv_ubuntu

Published

2026-08-17 21:16

Modified

2026-08-17 21:16

Summary

Details

Severity

6.1 (Medium)


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

5.2 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-68765	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-68765	REPORT
	https://github.com/hashcat/hashcat	REPORT
	https://github.com/hashcat/hashcat/commit/6f374c4…	REPORT
	https://github.com/hashcat/hashcat/pull/4755	REPORT
	https://www.vulncheck.com/advisories/hashcat-keep…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "hashcat",
            "binary_version": "4.0.1-1"
          },
          {
            "binary_name": "hashcat-data",
            "binary_version": "4.0.1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "hashcat",
        "purl": "pkg:deb/ubuntu/hashcat@4.0.1-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.60-1",
        "4.0.1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "hashcat",
            "binary_version": "5.1.0+ds1-2"
          },
          {
            "binary_name": "hashcat-data",
            "binary_version": "5.1.0+ds1-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "hashcat",
        "purl": "pkg:deb/ubuntu/hashcat@5.1.0+ds1-2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.1.0+ds1-1",
        "5.1.0+ds1-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "hashcat",
            "binary_version": "6.2.5+ds1-2"
          },
          {
            "binary_name": "hashcat-data",
            "binary_version": "6.2.5+ds1-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "hashcat",
        "purl": "pkg:deb/ubuntu/hashcat@6.2.5+ds1-2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.1.1+ds1-1",
        "6.2.5+ds1-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "hashcat",
            "binary_version": "6.2.6+ds1-1build2"
          },
          {
            "binary_name": "hashcat-data",
            "binary_version": "6.2.6+ds1-1build2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "hashcat",
        "purl": "pkg:deb/ubuntu/hashcat@6.2.6+ds1-1build2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.2.6+ds1-1",
        "6.2.6+ds1-1build1",
        "6.2.6+ds1-1build2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "hashcat",
            "binary_version": "7.1.2+ds1-3"
          },
          {
            "binary_name": "hashcat-data",
            "binary_version": "7.1.2+ds1-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "hashcat",
        "purl": "pkg:deb/ubuntu/hashcat@7.1.2+ds1-3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.2.6+ds2-1",
        "7.1.2+ds1-3"
      ]
    }
  ],
  "aliases": [],
  "details": "hashcat master branch builds after v7.1.2 contain a heap buffer overflow vulnerability in the KeePass AESKDF/KDBX v4 module (module 34301) that allows attackers to corrupt adjacent heap memory by supplying an oversized ninth hash field token. The module accepts up to 600 hex characters for the ninth token field but decodes it into a fixed 256-byte buffer with no length check, allowing a maximal input to write up to 44 bytes past the buffer boundary into adjacent esalt fields and heap chunk metadata, potentially enabling heap corruption or memory access violations.",
  "id": "UBUNTU-CVE-2026-68765",
  "modified": "2026-08-17T21:16:00Z",
  "published": "2026-08-17T21:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-68765"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-68765"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/hashcat/hashcat"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/hashcat/hashcat/commit/6f374c4ff7d5dc951530fbbbcf6b45e3c169b100"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/hashcat/hashcat/pull/4755"
    },
    {
      "type": "REPORT",
      "url": "https://www.vulncheck.com/advisories/hashcat-keepass-kdbx-v4-module-heap-buffer-overflow-via-token-field"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-68765"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-68765 (GCVE-0-2026-68765)

FKIE_CVE-2026-68765

GHSA-JFQQ-RFM8-8FRM

ubuntu-cve-2026-68765

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature