Vulnerability-Lookup

GHSA-GXHG-7JX8-M22J

Vulnerability from github – Published: 2026-06-09 18:30 – Updated: 2026-06-10 09:31

Details

Issue summary: An attacker-controlled CMP (Certificate Management Protocol) server could trigger a NULL pointer dereference in a CMP client application.

Impact summary: A NULL pointer dereference causes a crash of the application and a Denial of Service.

An attacker controlling a CMP server (or acting as a man-in-the-middle) could craft a CMP response containing a CRMF (Certificate Request Message Format) CertRepMessage with an EncryptedValue structure where the symmAlg field has an algorithm OID but no parameters field. When the OpenSSL CMP client processes this response, the NULL dereference occurs, causing a crash of the CMP client.

Applications that process untrusted CMP/CRMF messages may be affected.

The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.

Severity

5.9 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-42767"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-09T17:17:08Z",
    "severity": "MODERATE"
  },
  "details": "Issue summary: An attacker-controlled CMP (Certificate Management Protocol)\nserver could trigger a NULL pointer dereference in a CMP client application.\n\nImpact summary: A NULL pointer dereference causes a crash of the\napplication and a Denial of Service.\n\nAn attacker controlling a CMP server (or acting as a man-in-the-middle) could\ncraft a CMP response containing a CRMF (Certificate Request Message Format)\nCertRepMessage with an EncryptedValue structure where the symmAlg field\nhas an algorithm OID but no parameters field. When the OpenSSL CMP client\nprocesses this response, the NULL dereference occurs, causing a crash of\nthe CMP client.\n\nApplications that process untrusted CMP/CRMF messages may be affected.\n\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this\nissue, as the affected code is outside the OpenSSL FIPS module boundary.",
  "id": "GHSA-gxhg-7jx8-m22j",
  "modified": "2026-06-10T09:31:57Z",
  "published": "2026-06-09T18:30:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42767"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssl/openssl/commit/61a86a8cd73546c9fea916f3d304c1293e05c046"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssl/openssl/commit/665d5254083affde9982efca7c41dd01cacc8774"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssl/openssl/commit/810b722f772652ad48042bcc7ab07e3414b11d0f"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssl/openssl/commit/b90ff3b1bd33b1c18e6a09936d097c2eddef8873"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssl/openssl/commit/e6f912907fc2ec82a0fd07aae55172c5e5e3d90d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssl/security/commit/61a86a8cd73546c9fea916f3d304c1293e05c046"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssl/security/commit/665d5254083affde9982efca7c41dd01cacc8774"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssl/security/commit/810b722f772652ad48042bcc7ab07e3414b11d0f"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssl/security/commit/b90ff3b1bd33b1c18e6a09936d097c2eddef8873"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssl/security/commit/e6f912907fc2ec82a0fd07aae55172c5e5e3d90d"
    },
    {
      "type": "WEB",
      "url": "https://openssl-library.org/news/secadv/20260609.txt"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-42767 (GCVE-0-2026-42767)

Vulnerability from cvelistv5 – Published: 2026-06-09 16:03 – Updated: 2026-06-10 07:48

Title

NULL Pointer Dereference in CRMF EncryptedValue Decryption

Summary

Issue summary: An attacker-controlled CMP (Certificate Management Protocol) server could trigger a NULL pointer dereference in a CMP client application. Impact summary: A NULL pointer dereference causes a crash of the application and a Denial of Service. An attacker controlling a CMP server (or acting as a man-in-the-middle) could craft a CMP response containing a CRMF (Certificate Request Message Format) CertRepMessage with an EncryptedValue structure where the symmAlg field has an algorithm OID but no parameters field. When the OpenSSL CMP client processes this response, the NULL dereference occurs, causing a crash of the CMP client. Applications that process untrusted CMP/CRMF messages may be affected. The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.

Severity

5.9 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-476 - NULL Pointer Dereference

Assigner

openssl

References

6 references

URL	Tags
https://openssl-library.org/news/secadv/20260609.txt	vendor-advisory
https://github.com/openssl/openssl/commit/b90ff3b…	patch
https://github.com/openssl/openssl/commit/e6f9129…	patch
https://github.com/openssl/openssl/commit/810b722…	patch
https://github.com/openssl/openssl/commit/665d525…	patch
https://github.com/openssl/openssl/commit/61a86a8…	patch

Impacted products

1 product

Vendor	Product	Version
OpenSSL	OpenSSL	Affected: 4.0.0 , < 4.0.1 (semver) Affected: 3.6.0 , < 3.6.3 (semver) Affected: 3.5.0 , < 3.5.7 (semver) Affected: 3.4.0 , < 3.4.6 (semver) Affected: 3.0.0 , < 3.0.21 (semver)

Date Public

2026-06-09 14:00

Credits

Zhanpeng Liu (Tencent Xuanwu Lab) Guannan Wang (Tencent Xuanwu Lab) Guancheng Li (Tencent Xuanwu Lab) Bhabani Sankar Das Igor Ustinov Tomáš Mráz

Show details on NVD website

JSON

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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.

Action not permitted

GHSA-GXHG-7JX8-M22J

CVE-2026-42767 (GCVE-0-2026-42767)

Tags

Sightings

Nomenclature