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CVE-2026-42766

· Published 09/06/2026 17:17 · Modified 10/06/2026 08:16

Labels: CVE-2026-42766 2026-06-09CVE-2026-42766CWE-476[email protected]

Essential information

Published
09/06/2026 17:17
Modified
10/06/2026 08:16
Author
Creator
CVSS
5.9 MEDIUM (v3.1)
CISA KEV
No
CWE
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS metrics

Description

Issue summary: A specially crafted password-encrypted CMS message can trigger a NULL pointer dereference during CMS decryption. Impact summary: This NULL pointer dereference leads to an application crash and a Denial of Service. The CMS PasswordRecipientInfo.keyDerivationAlgorithm field is defined as OPTIONAL in the ASN.1 specification and may therefore be absent in specially crafted inputs. During the password-based CMS decryption the OpenSSL CMS implementation dereferences this field without first checking whether it was present. An attacker who supplies such a CMS message to an application performing password-based CMS decryption can trigger an application crash, leading to a Denial of Service. Applications that process password-encrypted CMS 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.

NVD status

Status
Awaiting Analysis — CVE has been recently published to the CVE List and has been received by the NVD.
Source
[email protected]
NVD
View on NVD

Affected products (CPE)

ProductCPE
openssl / openssl cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*

References