CVE-2026-42767 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.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2026-42767
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.35 Probability of exploitation activity being observed over the next 30 days (27th percentile)
CVSS score for CVE-2026-42767
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
5.9 Medium
Products affected by CVE-2026-42767
OpenSSL 3.0.0
OpenSSL 3.0.1
OpenSSL 3.0.10
OpenSSL 3.0.11
OpenSSL 3.0.12
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
More on DVE scores

CVE-2026-42767 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 7,744 33.33%
JP 2,771 11.92%
DE 1,849 7.96%
GB 962 4.14%
IN 960 4.13%
IE 868 3.74%
FR 666 2.87%
CA 647 2.78%
KR 547 2.35%
NL 532 2.29%

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CVE-2026-42767 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 14,541 79.58%
Telecommunications 2,069 11.32%
Education 962 5.26%
Government/Politics 204 1.12%
Business Services 76 0.42%
Finance 66 0.36%
Manufacturing 51 0.28%
Healthcare/Wellness 51 0.28%
Utilities 35 0.19%
Nonprofit/NGO 32 0.18%

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