Vulnerability-Lookup

GHSA-VGV2-WHP7-2895

Vulnerability from github – Published: 2026-08-22 15:31 – Updated: 2026-08-22 15:31

Details

hashcat's fgetl() function in src/filehandling.c writes a null terminator one byte past the caller's buffer when an input line is exactly the buffer length. Attackers can trigger this out-of-bounds heap write by providing a hash file, potfile, or wordlist containing a line of exactly HCBUFSIZ_LARGE bytes.

Severity

6.1 (Medium)


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

6.9 (Medium)


                  
                    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

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-68767"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-193"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-22T15:16:20Z",
    "severity": "MODERATE"
  },
  "details": "hashcat\u0027s fgetl() function in src/filehandling.c writes a null terminator one byte past the caller\u0027s buffer when an input line is exactly the buffer length. Attackers can trigger this out-of-bounds heap write by providing a hash file, potfile, or wordlist containing a line of exactly HCBUFSIZ_LARGE bytes.",
  "id": "GHSA-vgv2-whp7-2895",
  "modified": "2026-08-22T15:31:04Z",
  "published": "2026-08-22T15:31:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68767"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hashcat/hashcat/issues/4739"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hashcat/hashcat/commit/93b55d37d3b2340013d4036f10181ddc67d44249"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hashcat/hashcat"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hashcat/hashcat/blob/v7.1.2/src/filehandling.c#L1032-L1060"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/hashcat-through-off-by-one-out-of-bounds-heap-write-in-fgetl"
    }
  ],
  "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:N/UI:P/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"
    }
  ]
}

CVE-2026-68767 (GCVE-0-2026-68767)

Vulnerability from cvelistv5 – Published: 2026-08-22 14:12 – Updated: 2026-08-22 14:12

Title

hashcat through 7.1.2 Off-by-One Out-of-Bounds Heap Write in fgetl()

Summary

Severity

6.9 (Medium)


                        
                          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

6.1 (Medium)


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

CWE

CWE-193 - Off-by-one Error

Assigner

VulnCheck mitre root

References

5 references

URL	Tags
https://github.com/hashcat/hashcat/issues/4739	issue-tracking
https://github.com/hashcat/hashcat	product
https://github.com/hashcat/hashcat/commit/93b55d3…	patch
https://github.com/hashcat/hashcat/blob/v7.1.2/sr…	technical-description
https://www.vulncheck.com/advisories/hashcat-thro…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
hashcat	hashcat	Affected: 0 , ≤ 7.1.2 (semver) cpe:2.3:a:hashcat:hashcat::::::::

Date Public

2026-07-31 00:00

Credits

Piotr Kowalczyk

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "hashcat",
          "vendor": "hashcat",
          "versions": [
            {
              "lessThanOrEqual": "7.1.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:hashcat:hashcat:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "7.1.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Piotr Kowalczyk"
        }
      ],
      "datePublic": "2026-07-31T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "hashcat\u0027s fgetl() function in src/filehandling.c writes a null terminator one byte past the caller\u0027s buffer when an input line is exactly the buffer length. Attackers can trigger this out-of-bounds heap write by providing a hash file, potfile, or wordlist containing a line of exactly HCBUFSIZ_LARGE bytes."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "LOW"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-193",
              "description": "Off-by-one Error",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-22T14:12:43.477Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Issue #4739",
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/hashcat/hashcat/issues/4739"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/hashcat/hashcat"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/hashcat/hashcat/commit/93b55d37d3b2340013d4036f10181ddc67d44249"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/hashcat/hashcat/blob/v7.1.2/src/filehandling.c#L1032-L1060"
        },
        {
          "name": "VulnCheck Advisory: hashcat through 7.1.2 Off-by-One Out-of-Bounds Heap Write in fgetl()",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/hashcat-through-off-by-one-out-of-bounds-heap-write-in-fgetl"
        }
      ],
      "title": "hashcat through 7.1.2 Off-by-One Out-of-Bounds Heap Write in fgetl()",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-68767",
    "datePublished": "2026-08-22T14:12:43.477Z",
    "dateReserved": "2026-07-31T16:10:55.447Z",
    "dateUpdated": "2026-08-22T14:12:43.477Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

GHSA-VGV2-WHP7-2895

CVE-2026-68767 (GCVE-0-2026-68767)

Tags

Sightings

Nomenclature