openssl: Heap Use-After-Free in OpenSSL PKCS7_verify()

A flaw was found in OpenSSL. When processing a specially crafted PKCS7 or S/MIME Secure/Multipurpose Internet Mail Extensions signed message, a heap use-after-free vulnerability in the PKCS7verify function can be triggered. This occurs if the SignedData digestAlgorithms field is present as an emp...

Johnny-You-Are-Fired

Johnny-You-Are-Fired Artifacts for the USENIX publication | Full paper here Abstract OpenPGP and S/MIME are the two major standards to encrypt and digitally sign emails. Digital signatures are supposed to guarantee authenticity and integrity of messages. In this work we show practical forgery...

CVE-2026-45447

🚨 CVE-2026-45447 - Критическая уязвимость Use-After-Free в OpenSSL Использование после освобождения Use-After-Free в куче в PKCS7verify, приводящее к повреждению памяти, сбоям и возможному удаленному выполнению кода. 📖 Краткое описание CVE-2026-45447 — это критическая уязвимость в функции...

CVE-2026-20355

Multiple vulnerabilities in the Secure/Multipurpose Internet Mail Extensions S/MIME decryption functionality of Cisco Secure Email could allow an unauthenticated, remote attacker to recover plain text from encrypted email messages. These vulnerabilities are due to insufficient validation of messa...

CVE-2026-20354

Multiple vulnerabilities in the Secure/Multipurpose Internet Mail Extensions S/MIME decryption functionality of Cisco Secure Email could allow an unauthenticated, remote attacker to recover plain text from encrypted email messages. These vulnerabilities are due to insufficient validation of messa...

EUVD-2026-70211

Multiple vulnerabilities in the Secure/Multipurpose Internet Mail Extensions S/MIME decryption functionality of Cisco Secure Email could allow an unauthenticated, remote attacker to recover plain text from encrypted email messages. These vulnerabilities are due to insufficient validation of messa...

CVE-2026-20355 Cisco Secure Email S/MIME Ciphertext Decryption Vulnerabilty

Multiple vulnerabilities in the Secure/Multipurpose Internet Mail Extensions S/MIME decryption functionality of Cisco Secure Email could allow an unauthenticated, remote attacker to recover plain text from encrypted email messages. These vulnerabilities are due to insufficient validation of messa...

CVE-2026-20355

CVE-2026-20355 affects the S/MIME decryption functionality of Cisco Secure Email . The root cause is insufficient validation of message integrity , allowing an unauthenticated, remote attacker to use a machine-in-the-middle technique to intercept and modify traffic between email gateways and reco...

EUVD-2026-70210

Multiple vulnerabilities in the Secure/Multipurpose Internet Mail Extensions S/MIME decryption functionality of Cisco Secure Email could allow an unauthenticated, remote attacker to recover plain text from encrypted email messages. These vulnerabilities are due to insufficient validation of messa...

CVE-2026-20354 Cisco Secure Email S/MIME Ciphertext Decryption Vulnerabilty

Multiple vulnerabilities in the Secure/Multipurpose Internet Mail Extensions S/MIME decryption functionality of Cisco Secure Email could allow an unauthenticated, remote attacker to recover plain text from encrypted email messages. These vulnerabilities are due to insufficient validation of messa...

CVE-2026-20354

CVE-2026-20354 affects the S/MIME decryption functionality of Cisco Secure Email . The root cause is insufficient validation of message integrity , allowing an unauthenticated remote attacker to use a man-in-the-middle technique to intercept and modify traffic between email gateways. A successful...

Cisco Secure Email Secure/Multipurpose Internet Mail Extensions Ciphertext Decryption Vulnerabilities

Multiple vulnerabilities in the Secure/Multipurpose Internet Mail Extensions S/MIME decryption functionality of Cisco Secure Email could allow an unauthenticated, remote attacker to recover plain text from encrypted email messages. These vulnerabilities are due to insufficient validation of messa...

PT-2026-84815

Multiple vulnerabilities in the Secure/Multipurpose Internet Mail Extensions S/MIME decryption functionality of Cisco Secure Email could allow an unauthenticated, remote attacker to recover plain text from encrypted email messages. These vulnerabilities are due to insufficient validation of messa...

PT-2026-84814

Name of the Vulnerable Software and Affected Versions Cisco Secure Email affected versions not specified Description Insufficient validation of message integrity in the Secure/Multipurpose Internet Mail Extensions S/MIME decryption functionality allows an unauthenticated remote attacker to recove...

CVE-2026-69247

A flaw was found in cryptography, a Python package for cryptographic primitives. This vulnerability, known as a Bleichenbacher oracle, arises during PKCS7 EnvelopedData decryption. An attacker can exploit distinguishable error messages and timing differences during decryption to gain information...

CVE-2026-59641

A flaw was found in Bouncy Castle for Java. The S/MIME Secure/Multipurpose Internet Mail Extensions validator improperly trusts the signing time asserted by the signer during path validation. This could allow an attacker to bypass certificate path validation, potentially leading to the acceptance...

Astra Linux – Vulnerability in Thunderbird

The OCSP revocation status of certificates was not checked when verifying S/Mime signatures. Emails signed with revoked certificates would be displayed as having a valid signature. Thunderbird versions from 68 to 102.7.0 were affected by this bug. This vulnerability affects Thunderbird versions...

Astra Linux – Vulnerability in nss, Thunderbird

Versions of NSS Network Security Services prior to 3.73 or 3.68.1 ESR are vulnerable to a heap overflow when handling DER-encoded DSA or RSA-PSS signatures. Applications that use NSS to handle signatures encoded within CMS, S/MIME, PKCS \7, or PKCS \12 are likely to be affected. Applications that...

Astra Linux – Vulnerability in Thunderbird

The OCSP revocation status of recipient certificates was not checked when sending S/MIME encrypted emails. As a result, revoked certificates were accepted. This bug affected Thunderbird versions from 68 to 102.9.1. This vulnerability affects Thunderbird versions earlier than 102.10...

Astra Linux – Vulnerability in Thunderbird

Thunderbird versions prior to 91.3.0 are vulnerable to a heap overflow vulnerability described in CVE-2021-43527 when processing S/MIME messages. Thunderbird versions 91.3.0 and later will not call the vulnerable code when processing S/MIME messages that contain certificates with DER-encoded DSA ...