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NVD Vulnerability Details :
CVE-2026-45447
Awaiting Analysis
More InfoOfficial Page
Source-openssl-security@openssl.org
View Known Exploited Vulnerability (KEV) details
Published At-09 Jun, 2026 | 17:17
Updated At-10 Jun, 2026 | 15:16

Issue summary: A specially crafted PKCS#7 or S/MIME signed message could trigger a use-after-free during PKCS#7 signature verification. Impact summary: A use-after-free may result in process crashes, heap corruption, or potentially remote code execution. When processing a PKCS#7 or S/MIME signed message, if the SignedData digestAlgorithms field is present as an empty ASN.1 SET, OpenSSL may incorrectly free a caller-owned BIO during PKCS7_verify(). A subsequent use of the BIO by the calling application results in a use-after-free condition. In the common case this occurs when the application later calls BIO_free() on the BIO originally passed to PKCS7_verify(). Depending on allocator behavior and application-specific BIO usage patterns, this may result in a crash or other memory corruption. In some application contexts this may potentially be exploitable for remote code execution. Applications that process PKCS#7 or S/MIME signed messages using OpenSSL PKCS#7 APIs may be affected. Applications using the CMS APIs for this processing are not 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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.18.8HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Type: Secondary
Version: 3.1
Base score: 8.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CPE Matches

Weaknesses
CWE IDTypeSource
CWE-416Secondaryopenssl-security@openssl.org
CWE ID: CWE-416
Type: Secondary
Source: openssl-security@openssl.org
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/openssl/openssl/commit/3aad5eb7af4de4ee0633c30a8541a54d9bbde63copenssl-security@openssl.org
N/A
https://github.com/openssl/openssl/commit/7d4a980c62258c5910cc883936e0c8dbab4d75a8openssl-security@openssl.org
N/A
https://github.com/openssl/openssl/commit/9dfd688ad2290fc5075cacbc9bf0c9a93eefed54openssl-security@openssl.org
N/A
https://github.com/openssl/openssl/commit/a541ae8bfe849a30cc885e8780715c0f488e496copenssl-security@openssl.org
N/A
https://github.com/openssl/openssl/commit/c505d7559da5d5f9f2c3913c6883a5562ce7273eopenssl-security@openssl.org
N/A
https://openssl-library.org/news/secadv/20260609.txtopenssl-security@openssl.org
N/A
Hyperlink: https://github.com/openssl/openssl/commit/3aad5eb7af4de4ee0633c30a8541a54d9bbde63c
Source: openssl-security@openssl.org
Resource: N/A
Hyperlink: https://github.com/openssl/openssl/commit/7d4a980c62258c5910cc883936e0c8dbab4d75a8
Source: openssl-security@openssl.org
Resource: N/A
Hyperlink: https://github.com/openssl/openssl/commit/9dfd688ad2290fc5075cacbc9bf0c9a93eefed54
Source: openssl-security@openssl.org
Resource: N/A
Hyperlink: https://github.com/openssl/openssl/commit/a541ae8bfe849a30cc885e8780715c0f488e496c
Source: openssl-security@openssl.org
Resource: N/A
Hyperlink: https://github.com/openssl/openssl/commit/c505d7559da5d5f9f2c3913c6883a5562ce7273e
Source: openssl-security@openssl.org
Resource: N/A
Hyperlink: https://openssl-library.org/news/secadv/20260609.txt
Source: openssl-security@openssl.org
Resource: N/A
Change History
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