cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. From 44.0.0 until 50.0.0, pkcs7_decrypt_der, pkcs7_decrypt_pem, and pkcs7_decrypt_smime reported the outcome of decrypting a RecipientInfo's encryptedKey in several distinguishable ways, one of which disclosed the exact length recovered from the RSA operation. The same distinction was also observable by timing. An application that decrypts attacker-supplied EnvelopedData and reflects the outcome gives the attacker a Bleichenbacher oracle against the content-encryption key. Decryption ran as RSA PKCS#1 v1.5 decrypt of encryptedKey, build an AES cipher from the result, then AES-CBC decrypt and PKCS#7 unpad. Invalid RSA padding, a valid padding with a bad key length, a correct length with a wrong key, and the real key each failed or succeeded differently. Case 1 is reachable only where the linked library lacks implicit rejection: OpenSSL 3.0 and 3.1, LibreSSL, and BoringSSL. Exploitation requires a service that auto-decrypts untrusted EnvelopedData matching the victim certificate and answers adaptively at high volume, such as an S/MIME gateway or mail filter. This issue is fixed in 50.0.0.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - cryptography is a package designed to expose cryptographic primitives and recipes to Python developers.
    From 44.0.0 until 50.0.0, pkcs7_decrypt_der, pkcs7_decrypt_pem, and pkcs7_decrypt_smime reported the
    outcome of decrypting a RecipientInfo's encryptedKey in several distinguishable ways, one of which
    disclosed the exact length recovered from the RSA operation. The same distinction was also observable by
    timing. An application that decrypts attacker-supplied EnvelopedData and reflects the outcome gives the
    attacker a Bleichenbacher oracle against the content-encryption key. Decryption ran as RSA PKCS#1 v1.5
    decrypt of encryptedKey, build an AES cipher from the result, then AES-CBC decrypt and PKCS#7 unpad.
    Invalid RSA padding, a valid padding with a bad key length, a correct length with a wrong key, and the
    real key each failed or succeeded differently. Case 1 is reachable only where the linked library lacks
    implicit rejection: OpenSSL 3.0 and 3.1, LibreSSL, and BoringSSL. Exploitation requires a service that
    auto-decrypts untrusted EnvelopedData matching the victim certificate and answers adaptively at high
    volume, such as an S/MIME gateway or mail filter. This issue is fixed in 50.0.0. (CVE-2026-69247)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - cryptography is a package designed to expose cryptographic primitives and recipes to Python developers.
    From 44.0.0 until 50.0.0, pkcs7_decrypt_der, pkcs7_decrypt_pem, and pkcs7_decrypt_smime reported the     outcome of decrypting a RecipientInfo's encryptedKey in several distinguishable ways, one of which     disclosed the exact length recovered from the RSA operation. The same distinction was also observable by     timing. An application that decrypts attacker-supplied EnvelopedData and reflects the outcome gives the     attacker a Bleichenbacher oracle against the content-encryption key. Decryption ran as RSA PKCS#1 v1.5     decrypt of encryptedKey, build an AES cipher from the result, then AES-CBC decrypt and PKCS#7 unpad.
    Invalid RSA padding, a valid padding with a bad key length, a correct length with a wrong key, and the     real key each failed or succeeded differently. Case 1 is reachable only where the linked library lacks     implicit rejection: OpenSSL 3.0 and 3.1, LibreSSL, and BoringSSL. Exploitation requires a service that     auto-decrypts untrusted EnvelopedData matching the victim certificate and answers adaptively at high     volume, such as an S/MIME gateway or mail filter. This issue is fixed in 50.0.0. (CVE-2026-69247)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
445592	SCA: security update for cryptography (GHSA-g6cj-pr64-35w5)	Tenable Cloud Security	SCA Checks	Local	high
445592	SCA: security update for cryptography (GHSA-g6cj-pr64-35w5)	Tenable Self-Hosted Container Security	SCA Checks	Local	high
331896	Linux Distros Unpatched Vulnerability : CVE-2026-69247	Nessus	Misc.	Local	high

Detections

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CVE-2026-69247

high

Tenable Plugins

high

high

high