Pyca vulnerabilities
We track 6 vulnerabilities in Pyca products across 2 products. 6 are rated high or critical, and none are known to be exploited. The most recent was published on August 3, 2026.
Latest Pyca vulnerabilities
- 8.7 High severity
cryptography: Uncontrolled Resource Consumption
python-cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In versions 42.0.0 through 48.0.0, when resolving invalid certificate chains that include duplicate copies of self-signed certificates, the processin
- 8.2 High severity
cryptography: Observable Timing Discrepancy
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
- 9.8 Critical severity
cryptography: Improper Restriction of Operations within the Bounds of a Memory Buffer
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. From 45.0.0 to before 46.0.7, if a non-contiguous buffer was passed to APIs which accepted Python buffers (e.g. Hash.update()), this could lead to buffer ov
- 9.8 Critical severity
pyopenssl: Buffer Copy without Checking Size of Input
pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 22.0.0 and prior to version 26.0.0, if a user provided callback to `set_cookie_generate_callback` returned a cookie value greater than 256 bytes, pyOpenSSL would overflow an OpenSSL
- 7.5 High severity
cryptography: NULL Pointer Dereference
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Starting in version 38.0.0 and prior to version 42.0.4, if `pkcs12.serialize_key_and_certificates` is called with both a certificate whose public key did no
- 7.5 High severity
cryptography: NULL Pointer Dereference
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Calling `load_pem_pkcs7_certificates` or `load_der_pkcs7_certificates` could lead to a NULL-pointer dereference and segfault. Exploitation of this vulnerabi