Vulnerability-Lookup

CVE-2026-8721 (GCVE-0-2026-8721)

Vulnerability from cvelistv5 – Published: 2026-05-17 18:51 – Updated: 2026-05-18 12:56

Title

Crypt::OpenSSL::PKCS12 versions through 1.94 for Perl truncates passwords with embedded NULLs

Summary

Crypt::OpenSSL::PKCS12 versions through 1.94 for Perl truncates passwords with embedded NULLs. Password parameters in PKCS12.xs are declared char *, which routes through Perl's default typemap to SvPV_nolen. The Perl length is discarded. The C code (or OpenSSL internally) calls strlen() on the buffer. Any password byte at or after the first NULL is silently dropped. Binary / KDF-derived / HMAC-derived passwords lose entropy without any warnings.

Severity

9.8 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-18 12:56 UTC

CWE

CWE-170 - Improper Null Termination

Assigner

CPANSec CNA under the redhat root

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

References

2 references

URL	Tags
https://metacpan.org/release/JONASBN/Crypt-OpenSS…	release-notes
http://www.openwall.com/lists/oss-security/2026/05/17/6

Impacted products

1 product

Vendor	Product	Version	CPE status
JONASBN	Crypt::OpenSSL::PKCS12	Affected: 0 , ≤ 1.94 (custom)	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-8721

Vulnerability from fkie_nvd - Published: 2026-05-17 19:16 - Updated: 2026-06-17 11:04

Severity

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

Summary

References

	URL	Tags
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://metacpan.org/release/JONASBN/Crypt-OpenSSL-PKCS12-1.95/view/Changes.md
	af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/05/17/6

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
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      "affectedData": [
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          "lang": "en",
          "value": "CWE-170"
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary"
    }
  ]
}

GHSA-HH8H-HXCJ-2PM7

Vulnerability from github – Published: 2026-05-17 21:30 – Updated: 2026-05-18 15:30

Details

Crypt::OpenSSL::PKCS12 versions through 1.94 for Perl truncates passwords with embedded NULLs.

Password parameters in PKCS12.xs are declared char *, which routes through Perl's default typemap to SvPV_nolen. The Perl length is discarded.

The C code (or OpenSSL internally) calls strlen() on the buffer. Any password byte at or after the first NULL is silently dropped. Binary / KDF-derived / HMAC-derived passwords lose entropy without any warnings.

Severity

9.8 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-8721"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-170"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-17T19:16:25Z",
    "severity": "CRITICAL"
  },
  "details": "Crypt::OpenSSL::PKCS12 versions through 1.94 for Perl truncates passwords with embedded NULLs.\n\nPassword parameters in PKCS12.xs are declared char *, which routes through Perl\u0027s default typemap to SvPV_nolen.  The Perl length is discarded.\n\nThe C code (or OpenSSL internally) calls strlen() on the buffer.  Any password byte at or after the first NULL is silently dropped. Binary / KDF-derived / HMAC-derived passwords lose entropy without any warnings.",
  "id": "GHSA-hh8h-hxcj-2pm7",
  "modified": "2026-05-18T15:30:37Z",
  "published": "2026-05-17T21:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8721"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/JONASBN/Crypt-OpenSSL-PKCS12-1.95/view/Changes.md"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/17/6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

UBUNTU-CVE-2026-8721 (CVE-2026-8721)

Vulnerability from osv_ubuntu – Published: 2026-05-17 19:16 – Updated: 2026-05-17 19:16 – Source website

Details

Severity

9.8 (Critical)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-8721	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-8721	REPORT
	https://lists.security.metacpan.org/cve-announce/…	REPORT
	https://github.com/dsully/perl-crypt-openssl-pkcs…	REPORT
	https://github.com/dsully/perl-crypt-openssl-pkcs…	REPORT
	https://github.com/dsully/perl-crypt-openssl-pkcs…	REPORT
	https://github.com/dsully/perl-crypt-openssl-pkcs…	REPORT
	https://metacpan.org/release/JONASBN/Crypt-OpenSS…	REPORT
	http://www.openwall.com/lists/oss-security/2026/05/17/6	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-openssl-pkcs12-perl",
            "binary_version": "0.7-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "libcrypt-openssl-pkcs12-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-openssl-pkcs12-perl@0.7-1build1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.7-1",
        "0.7-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-openssl-pkcs12-perl",
            "binary_version": "0.8-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libcrypt-openssl-pkcs12-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-openssl-pkcs12-perl@0.8-1build1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.7-3ubuntu2",
        "0.8-1",
        "0.8-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-openssl-pkcs12-perl",
            "binary_version": "1.2-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libcrypt-openssl-pkcs12-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-openssl-pkcs12-perl@1.2-1build1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2-1",
        "1.2-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-openssl-pkcs12-perl",
            "binary_version": "1.9-3build4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libcrypt-openssl-pkcs12-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-openssl-pkcs12-perl@1.9-3build4?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.9-2",
        "1.9-3",
        "1.9-3build1",
        "1.9-3build3",
        "1.9-3build4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-openssl-pkcs12-perl",
            "binary_version": "1.94-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libcrypt-openssl-pkcs12-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-openssl-pkcs12-perl@1.94-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.94-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-openssl-pkcs12-perl",
            "binary_version": "1.94-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libcrypt-openssl-pkcs12-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-openssl-pkcs12-perl@1.94-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.94-1"
      ]
    }
  ],
  "aliases": [],
  "details": "Crypt::OpenSSL::PKCS12 versions through 1.94 for Perl truncates passwords with embedded NULLs. Password parameters in PKCS12.xs are declared char *, which routes through Perl\u0027s default typemap to SvPV_nolen.  The Perl length is discarded. The C code (or OpenSSL internally) calls strlen() on the buffer.  Any password byte at or after the first NULL is silently dropped. Binary / KDF-derived / HMAC-derived passwords lose entropy without any warnings.",
  "id": "UBUNTU-CVE-2026-8721",
  "modified": "2026-05-17T19:16:00Z",
  "published": "2026-05-17T19:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-8721"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-8721"
    },
    {
      "type": "REPORT",
      "url": "https://lists.security.metacpan.org/cve-announce/msg/40149249/"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/dsully/perl-crypt-openssl-pkcs12/commit/7b90e88a97f0ebe440032b8116249d1004d7ca6f"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/dsully/perl-crypt-openssl-pkcs12/commit/468712ae04188342b263f057ad65f21a3545013b"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/dsully/perl-crypt-openssl-pkcs12/commit/68904cd32691e223ad9eeff914812b8641eea14b"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/dsully/perl-crypt-openssl-pkcs12/commit/d69393f3207586e3c6f2fe1a21b0b8972b93f8db"
    },
    {
      "type": "REPORT",
      "url": "https://metacpan.org/release/JONASBN/Crypt-OpenSSL-PKCS12-1.95/view/Changes.md"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/17/6"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-8721"
  ]
}

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.

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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-2026-8721 (GCVE-0-2026-8721)

FKIE_CVE-2026-8721

GHSA-HH8H-HXCJ-2PM7

UBUNTU-CVE-2026-8721 (CVE-2026-8721)

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