Vulnerability-Lookup

CVE-2026-6659 (GCVE-0-2026-6659)

Vulnerability from cvelistv5 – Published: 2026-05-08 17:17 – Updated: 2026-05-26 22:52

Title

Crypt::PasswdMD5 versions through 1.42 for Perl generates insecure random values for salts

Summary

Crypt::PasswdMD5 versions through 1.42 for Perl generates insecure random values for salts. The built-in rand function is predictable, and unsuitable for cryptography.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-08 18:01 UTC

CWE

CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

Assigner

CPANSec CNA under the redhat root

CNA scorecard C 64/100 over 265 records in the last 180 days details

References

5 references

URL	Tags
https://metacpan.org/release/RSAVAGE/Crypt-Passwd…	release-notes
https://github.com/ronsavage/Crypt-PasswdMD5/pull/3	issue-tracking
https://github.com/ronsavage/Crypt-PasswdMD5/comm…	patch
https://metacpan.org/release/RSAVAGE/Crypt-Passwd…
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version	CPE status
RSAVAGE	Crypt::PasswdMD5	Affected: 0 , ≤ 1.42 (custom)	guessed

Show details on NVD website

JSON

To clipboard

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}

FKIE_CVE-2026-6659

Vulnerability from fkie_nvd - Published: 2026-05-08 18:16 - Updated: 2026-06-17 11:01

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

Crypt::PasswdMD5 versions through 1.42 for Perl generates insecure random values for salts. The built-in rand function is predictable, and unsuitable for cryptography.

References

	URL	Tags
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://github.com/ronsavage/Crypt-PasswdMD5/commit/a2f821637db0296082297aa4b02254ab08f0dc5e.patch
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://github.com/ronsavage/Crypt-PasswdMD5/pull/3
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://metacpan.org/release/RSAVAGE/Crypt-PasswdMD5-1.42/source/lib/Crypt/PasswdMD5.pm#L35-47
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://metacpan.org/release/RSAVAGE/Crypt-PasswdMD5-1.43/changes
	af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/05/08/17

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
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    {
      "affectedData": [
        {
          "collectionURL": "https://cpan.org/modules",
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          "value": "CWE-338"
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary"
    }
  ]
}

GHSA-J539-XXC6-73WF

Vulnerability from github – Published: 2026-05-08 18:31 – Updated: 2026-05-27 00:31

Details

Crypt::PasswdMD5 versions through 1.42 for Perl generates insecure random values for salts.

The built-in rand function is predictable, and unsuitable for cryptography.

Severity

7.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-6659"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-338"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-08T18:16:34Z",
    "severity": "HIGH"
  },
  "details": "Crypt::PasswdMD5 versions through 1.42 for Perl generates insecure random values for salts.\n\nThe built-in rand function is predictable, and unsuitable for cryptography.",
  "id": "GHSA-j539-xxc6-73wf",
  "modified": "2026-05-27T00:31:26Z",
  "published": "2026-05-08T18:31:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6659"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ronsavage/Crypt-PasswdMD5/pull/3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ronsavage/Crypt-PasswdMD5/commit/a2f821637db0296082297aa4b02254ab08f0dc5e.patch"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/RSAVAGE/Crypt-PasswdMD5-1.42/source/lib/Crypt/PasswdMD5.pm#L35-47"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/RSAVAGE/Crypt-PasswdMD5-1.43/changes"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/08/17"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

OPENSUSE-SU-2026:11000-1

Vulnerability from csaf_opensuse - Published: 2026-06-11 00:00 - Updated: 2026-09-17 17:09

Summary

perl-Crypt-PasswdMD5-1.430.0-1.1 on GA media

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2026-6659.

CVE-2026-6659

Recommended: 4 products

Open the full advisory

OPENSUSE-SU-2026:21137-1

Vulnerability from csaf_opensuse - Published: 2026-06-18 07:51 - Updated: 2026-09-17 17:36

Summary

Security update for perl-Crypt-PasswdMD5

Severity

Important

Scope

1 vulnerability in this advisory, including CVE-2026-6659.

CVE-2026-6659

Recommended: 1 product

Open the full advisory

UBUNTU-CVE-2026-6659 (CVE-2026-6659)

Vulnerability from osv_ubuntu – Published: 2026-05-08 18:16 – Updated: 2026-05-20 15:24 – Source website

Details

Crypt::PasswdMD5 versions through 1.42 for Perl generates insecure random values for salts. The built-in rand function is predictable, and unsuitable for cryptography.

Severity

7.5 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-6659	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-6659	REPORT
	https://lists.security.metacpan.org/cve-announce/…	REPORT
	https://metacpan.org/release/RSAVAGE/Crypt-Passwd…	REPORT
	http://www.openwall.com/lists/oss-security/2026/0…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-passwdmd5-perl",
            "binary_version": "1.3-10"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "libcrypt-passwdmd5-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-passwdmd5-perl@1.3-10?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3-10"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-passwdmd5-perl",
            "binary_version": "1.3-10"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "libcrypt-passwdmd5-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-passwdmd5-perl@1.3-10?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3-10"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-passwdmd5-perl",
            "binary_version": "1.3-10"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libcrypt-passwdmd5-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-passwdmd5-perl@1.3-10?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3-10"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-passwdmd5-perl",
            "binary_version": "1.40-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libcrypt-passwdmd5-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-passwdmd5-perl@1.40-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.40-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-passwdmd5-perl",
            "binary_version": "1.41-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libcrypt-passwdmd5-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-passwdmd5-perl@1.41-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.41-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-passwdmd5-perl",
            "binary_version": "1.42-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libcrypt-passwdmd5-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-passwdmd5-perl@1.42-2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.42-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-passwdmd5-perl",
            "binary_version": "1.42-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libcrypt-passwdmd5-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-passwdmd5-perl@1.42-2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.42-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-passwdmd5-perl",
            "binary_version": "1.42-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libcrypt-passwdmd5-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-passwdmd5-perl@1.42-2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.42-2"
      ]
    }
  ],
  "aliases": [],
  "details": "Crypt::PasswdMD5 versions through 1.42 for Perl generates insecure random values for salts. The built-in rand function is predictable, and unsuitable for cryptography.",
  "id": "UBUNTU-CVE-2026-6659",
  "modified": "2026-05-20T15:24:33Z",
  "published": "2026-05-08T18:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-6659"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-6659"
    },
    {
      "type": "REPORT",
      "url": "https://lists.security.metacpan.org/cve-announce/msg/39857355/"
    },
    {
      "type": "REPORT",
      "url": "https://metacpan.org/release/RSAVAGE/Crypt-PasswdMD5-1.42/source/lib/Crypt/PasswdMD5.pm#L35-47"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/08/17"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-6659"
  ]
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-6659 (GCVE-0-2026-6659)

FKIE_CVE-2026-6659

GHSA-J539-XXC6-73WF

OPENSUSE-SU-2026:11000-1

OPENSUSE-SU-2026:21137-1

UBUNTU-CVE-2026-6659 (CVE-2026-6659)

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Nomenclature

Vulnerability timeline

Related by attack behaviour