CVE-2026-42767: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-gxhg-7jx8-m22j
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CVSS 5.9
CWE-476
Published
Advisory Summary

CVE-2026-42767 is a MODERATE (CVSS 5.9) security vulnerability vulnerability (CWE-476: NULL Pointer Dereference) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product dereferences a pointer that it expects to be valid but is null.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-42767 at a Glance

CVE Identifier CVE-2026-42767
GHSA Identifier GHSA-gxhg-7jx8-m22j
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-476: NULL Pointer Dereference
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.9

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-42767

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-42767, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-476: NULL Pointer Dereference, where the product dereferences a pointer that it expects to be valid but is null. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

References

NVD — CVE-2026-42767 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42767
Security Fix Commit FIX COMMIT
https://github.com/openssl/openssl/commit/61a86a8cd73546c9fea916f3d304c1293e05c046
Security Fix Commit FIX COMMIT
https://github.com/openssl/openssl/commit/665d5254083affde9982efca7c41dd01cacc8774
Security Fix Commit FIX COMMIT
https://github.com/openssl/openssl/commit/810b722f772652ad48042bcc7ab07e3414b11d0f
Security Fix Commit FIX COMMIT
https://github.com/openssl/openssl/commit/b90ff3b1bd33b1c18e6a09936d097c2eddef8873
Security Fix Commit FIX COMMIT
https://github.com/openssl/openssl/commit/e6f912907fc2ec82a0fd07aae55172c5e5e3d90d
Security Fix Commit FIX COMMIT
https://github.com/openssl/security/commit/61a86a8cd73546c9fea916f3d304c1293e05c046
Security Fix Commit FIX COMMIT
https://github.com/openssl/security/commit/665d5254083affde9982efca7c41dd01cacc8774
Security Fix Commit FIX COMMIT
https://github.com/openssl/security/commit/810b722f772652ad48042bcc7ab07e3414b11d0f
Security Fix Commit FIX COMMIT
https://github.com/openssl/security/commit/b90ff3b1bd33b1c18e6a09936d097c2eddef8873
Security Fix Commit FIX COMMIT
https://github.com/openssl/security/commit/e6f912907fc2ec82a0fd07aae55172c5e5e3d90d
openssl-library.org/news/secadv/2026060... WEB
https://openssl-library.org/news/secadv/20260609.txt

Frequently Asked Questions

What is CVE-2026-42767?
CVE-2026-42767 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-476: NULL Pointer Dereference.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-42767?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-42767?
CVE-2026-42767 has a CVSS v3.1 base score of 5.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-42767?
CVE-2026-42767 is classified under CWE-476: NULL Pointer Dereference (The product dereferences a pointer that it expects to be valid but is NULL.).
How can I check Maven dependencies for CVE-2026-42767?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-gxhg-7jx8-m22j",
  "modified" : "2026-06-10T09:31:57Z",
  "published" : "2026-06-09T18:30:43Z",
  "aliases" : [ "CVE-2026-42767" ],
  "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "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",
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  }, {
    "type" : "WEB",
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  }, {
    "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"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-476" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-06-09T17:17:08Z"
  }
}