Vulnerability-Lookup

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

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{
  "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"
    }
  ]
}

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 redhat root

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
JONASBN	Crypt::OpenSSL::PKCS12	Affected: 0 , ≤ 1.94 (custom)

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-05-17T21:18:34.820Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/05/17/6"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.8,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
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          },
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            "other": {
              "content": {
                "id": "CVE-2026-8721",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-18T12:56:25.907387Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-18T12:56:41.486Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Crypt-OpenSSL-PKCS12",
          "product": "Crypt::OpenSSL::PKCS12",
          "programFiles": [
            "PKCS12.xs"
          ],
          "programRoutines": [
            {
              "name": "Crypt::OpenSSL::PKCS12::mac_ok"
            },
            {
              "name": "Crypt::OpenSSL::PKCS12::changepass"
            },
            {
              "name": "Crypt::OpenSSL::PKCS12::create"
            },
            {
              "name": "Crypt::OpenSSL::PKCS12::create_as_string"
            },
            {
              "name": "Crypt::OpenSSL::PKCS12::certificate"
            },
            {
              "name": "Crypt::OpenSSL::PKCS12::ca_certificate"
            },
            {
              "name": "Crypt::OpenSSL::PKCS12::private_key"
            },
            {
              "name": "Crypt::OpenSSL::PKCS12::info_as_hash"
            },
            {
              "name": "Crypt::OpenSSL::PKCS12::info"
            }
          ],
          "repo": "https://github.com/dsully/perl-crypt-openssl-pkcs12",
          "vendor": "JONASBN",
          "versions": [
            {
              "lessThanOrEqual": "1.94",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
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      "descriptions": [
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          "lang": "en",
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        }
      ],
      "problemTypes": [
        {
          "descriptions": [
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              "lang": "en",
              "type": "CWE"
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      "providerMetadata": {
        "dateUpdated": "2026-05-17T18:51:41.420Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
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        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to 1.95 or later."
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      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "timeline": [
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          "lang": "en",
          "time": "2026-05-13T00:00:00.000Z",
          "value": "CPANSec identified issue"
        },
        {
          "lang": "en",
          "time": "2026-05-13T00:00:00.000Z",
          "value": "Author was notified"
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        {
          "lang": "en",
          "time": "2026-05-17T00:00:00.000Z",
          "value": "Maintainer released patch version"
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      "title": "Crypt::OpenSSL::PKCS12 versions through 1.94 for Perl truncates passwords with embedded NULLs",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
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    "datePublished": "2026-05-17T18:51:41.420Z",
    "dateReserved": "2026-05-16T01:07:36.063Z",
    "dateUpdated": "2026-05-18T12:56:41.486Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
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}

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.
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.