{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "7.1.2"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "68f56a2d8712867a8520bf4dcf07f6145c23df89"
            }
          ],
          "repo": "https://github.com/hashcat/hashcat",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-120"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68768.json"
  },
  "details": "hashcat contains a heap-based buffer overflow (out-of-bounds write) in the outfile_write() function in src/outfile.c. When assembling output into a fixed-size buffer (HCBUFSIZ_LARGE, ~16 MB), the function sequentially appends the username, separator, hash, and plaintext via memcpy without validating that the accumulated length stays within the buffer capacity. When run with --username --show against a crafted hash file containing an oversized username that nearly fills the buffer, the total assembled output exceeds the buffer, causing a heap buffer overflow that can corrupt memory and crash the process.",
  "id": "CVE-2026-68768",
  "modified": "2026-08-27T11:31:09.165335828Z",
  "published": "2026-08-22T14:12:44.241Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68768.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68768"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/hashcat-through-heap-buffer-overflow-in-outfile-write-via-oversized-username"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/hashcat/hashcat/issues/4740"
    },
    {
      "type": "FIX",
      "url": "https://github.com/hashcat/hashcat/commit/68f56a2d8712867a8520bf4dcf07f6145c23df89"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/hashcat/hashcat"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/hashcat/hashcat/blob/v7.1.2/src/outfile.c#L654-L668"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "hashcat through 7.1.2 Heap Buffer Overflow in outfile_write() via Oversized Username"
}