Vulnerability in Openssl
CVE-2026-42769
Issue Summary: An error in the callback used to verify the certificate provided in a Root CA key update Certificate Management Protocol (CMP) message response rendered the certificate validation ineffectual, which could lead to escalation…
Vulnerability class: Improper Certificate Validation
EPSS: 0.004 (32.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Openssl — versions 4.0.0, 3.6.0, 3.5.0
Weakness classification (CWE)
References
- openssl-security@openssl.org
- openssl-security@openssl.org
- openssl-security@openssl.org
- openssl-security@openssl.org
- openssl-security@openssl.org (vendor-advisory, Vendor Advisory)
- openssl-security@openssl.org (Patch, patch)
- openssl-security@openssl.org (Patch, patch)
- openssl-security@openssl.org (Patch, patch)
- openssl-security@openssl.org (Patch, patch)
Frequently asked questions
- What is CVE-2026-42769?
- CVE-2026-42769 is a medium-severity vulnerability in Openssl, classified under Improper Certificate Validation. CVSS score: 5.3/10. Published 2026-06-09.
- How severe is CVE-2026-42769?
- Medium severity. CVSS v3 base score is 5.3 out of 10.