一、漏洞信息
漏洞编号：CVE-2026-69247
漏洞归属组件：cryptography
漏洞归属分支：默认分支
漏洞归属的版本：48.0.0
漏洞修复版本: 50.0.0
CVSS分值：
BaseScore： N/A None
Vector： N/A
漏洞简述：
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.
漏洞公开时间：2026-08-03 22:16:52
漏洞创建时间：2026-08-05 03:02:58
漏洞详情参考链接：
https://nvd.nist.gov/vuln/detail/CVE-2026-69247
一、漏洞信息
漏洞编号：CVE-2026-69247
漏洞归属组件：cryptography
漏洞归属分支：默认分支
漏洞归属的版本：48.0.0
漏洞修复版本: 50.0.0
CVSS分值：
BaseScore： N/A None
Vector： N/A
漏洞简述：
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.
漏洞公开时间：2026-08-03 22:16:52
漏洞创建时间：2026-08-05 03:02:58
漏洞详情参考链接：
https://nvd.nist.gov/vuln/detail/CVE-2026-69247