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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-42767 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/openssl/openssl/commit/61a86a8cd73546c9fea916f3d304c1293e05c046 OpenSSL Software Foundation
https://github.com/openssl/openssl/commit/665d5254083affde9982efca7c41dd01cacc8774 OpenSSL Software Foundation
https://github.com/openssl/openssl/commit/810b722f772652ad48042bcc7ab07e3414b11d0f OpenSSL Software Foundation
https://github.com/openssl/openssl/commit/b90ff3b1bd33b1c18e6a09936d097c2eddef8873 OpenSSL Software Foundation
https://github.com/openssl/openssl/commit/e6f912907fc2ec82a0fd07aae55172c5e5e3d90d OpenSSL Software Foundation
https://openssl-library.org/news/secadv/20260609.txt OpenSSL Software Foundation

Weakness Enumeration

CWE-ID CWE Name Source
CWE-476 NULL Pointer Dereference OpenSSL Software Foundation  

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-42767
NVD Published Date:
06/09/2026
NVD Last Modified:
06/10/2026
Source:
OpenSSL Software Foundation