NULL pointer dereference in Openssl
CVE-2026-28389
Issue summary: During processing of a crafted CMS EnvelopedData message with KeyAgreeRecipientInfo a NULL pointer dereference can happen. Impact summary: Applications that process attacker-controlled CMS data may crash before authenticati…
EPSS: 0.001 (29.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Openssl — versions 3.6.0, 3.5.0, 3.4.0
Weakness classification (CWE)
References
- 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)
- openssl-security@openssl.org (Patch, patch)
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Frequently asked questions
- What is CVE-2026-28389?
- CVE-2026-28389 is a high-severity vulnerability in Openssl, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-04-07.
- How severe is CVE-2026-28389?
- High severity. CVSS v3 base score is 7.5 out of 10.