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Sicherheitslücken in python-cryptography

In den letzten 30 Tagen veröffentlichte Sicherheitslücken für python-cryptography: 0. Davon im KEV-Katalog: 0.

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Sicherheitslücken: 14

  1. CVE-2026-69249

    Hoch · CVSS 8.7EPSS 0,25%Korrektur verfügbar

    python-cryptography: Duplicate self-signed intermediates can cause exponential path-building

    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 processing recursively invokes the same candidate, leading to an exponential blowup. Although the limitation that the chain depth cannot exceed a specified maximum depth prevents unbounded recursion and guarantees termination, an attacker-controlled certificate chain can lead the processing to easily take more than 5s to reject in testing. This amplification could form the basis for a resource ex

    python-cryptographyBetriebssysteme
    • Auf 49.0.0-1 aktualisieren
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  2. CVE-2026-69248

    Mittel · CVSS 6.9EPSS 0,24%Korrektur verfügbar

    python-cryptography verifier accepts wildcard DNS names allowing escape from permittedSubtrees

    cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In versions 45.0.0 through 48.0.0, if an intermediate constrained CA permits the DNS name foo.example.com, and the leaf certificate has a wildcard in its DNS SAN of *.example.com, python-cryptography's verifier accepts which allows escaping outside of the permitted names. The core issue is in DNSConstraint::matches, where a wildcard pattern was treated as matching a more-specific permitted constraint even though *.example.com can expand to sibling names such as bar.example.com outside foo.example.com. This allows acceptance of an invalid ce

    python-cryptographyBetriebssysteme
    • Auf 49.0.0-1 aktualisieren
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  3. CVE-2026-69247

    Hoch · CVSS 8.2EPSS 0,27%Korrektur verfügbar

    cryptography: PKCS#7 EnvelopedData decryption exposes a Bleichenbacher oracle through distinguishable errors and timing

    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

    python-cryptographyBetriebssysteme
    • Auf 49.0.0-2 aktualisieren
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  4. CVE-2026-39892

    Mittel · CVSS 6.9EPSS 0,76%Korrektur verfügbar

    cryptography has a buffer overflow if non-contiguous buffers were passed to APIs

    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 overflows. This vulnerability is fixed in 46.0.7.

    python-cryptographyBetriebssysteme
    • Auf 46.0.7-1 aktualisieren
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  5. CVE-2026-34073

    Niedrig · CVSS 1.7EPSS 0,18%Korrektur verfügbar

    cryptography has incomplete DNS name constraint enforcement on peer names

    cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Prior to version 46.0.6, DNS name constraints were only validated against SANs within child certificates, and not the "peer name" presented during each validation. Consequently, cryptography would allow a peer named bar.example.com to validate against a wildcard leaf certificate for *.example.com, even if the leaf's parent certificate (or upwards) contained an excluded subtree constraint for bar.example.com. This issue has been patched in version 46.0.6.

    python-cryptographyBetriebssysteme
    • Auf 46.0.6-1 aktualisieren
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  6. CVE-2026-26007

    Hoch · CVSS 8.2EPSS 0,39%Korrektur verfügbar

    cryptography Subgroup Attack Due to Missing Subgroup Validation for SECT Curves

    cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Prior to 46.0.5, the public_key_from_numbers (or EllipticCurvePublicNumbers.public_key()), EllipticCurvePublicNumbers.public_key(), load_der_public_key() and load_pem_public_key() functions do not verify that the point belongs to the expected prime-order subgroup of the curve. This missing validation allows an attacker to provide a public key point P from a small-order subgroup. This can lead to security issues in various situations, such as the most commonly used signature verification (ECDSA) and shared key negotiation (ECDH). When the vi

    python-cryptographyBetriebssysteme
    • Auf 46.0.5-1 aktualisieren
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  7. CVE-2024-26130

    Hoch · CVSS 7.5EPSS 0,83%Korrektur verfügbar

    cryptography NULL pointer deference with pkcs12.serialize_key_and_certificates when called with a non-matching certificate and private key and an hmac_hash override

    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 not match the provided private key and an `encryption_algorithm` with `hmac_hash` set (via `PrivateFormat.PKCS12.encryption_builder().hmac_hash(...)`, then a NULL pointer dereference would occur, crashing the Python process. This has been resolved in version 42.0.4, the first version in which a `ValueError` is properly raised.

    python-cryptographyBetriebssysteme
    • Auf 42.0.5-1 aktualisieren
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  8. CVE-2023-50782

    Hoch · CVSS 7.5EPSS 1,12%Korrektur verfügbar

    Python-cryptography: bleichenbacher timing oracle attack against rsa decryption - incomplete fix for cve-2020-25659

    A flaw was found in the python-cryptography package. This issue may allow a remote attacker to decrypt captured messages in TLS servers that use RSA key exchanges, which may lead to exposure of confidential or sensitive data.

    python-cryptographyBetriebssysteme
    • Auf 42.0.5-1 aktualisieren
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  9. CVE-2023-49083

    Mittel · CVSS 5.9EPSS 0,98%Korrektur verfügbar

    cryptography vulnerable to NULL-dereference when loading PKCS7 certificates

    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 vulnerability poses a serious risk of Denial of Service (DoS) for any application attempting to deserialize a PKCS7 blob/certificate. The consequences extend to potential disruptions in system availability and stability. This vulnerability has been patched in version 41.0.6.

    python-cryptographyBetriebssysteme
    • Auf 41.0.7-1 aktualisieren
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  10. CVE-2023-23931

    Mittel · CVSS 4.8EPSS 1,3%Korrektur verfügbar

    Cipher.update_into can corrupt memory in pyca cryptography

    cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In affected versions `Cipher.update_into` would accept Python objects which implement the buffer protocol, but provide only immutable buffers. This would allow immutable objects (such as `bytes`) to be mutated, thus violating fundamental rules of Python and resulting in corrupted output. This now correctly raises an exception. This issue has been present since `update_into` was originally introduced in cryptography 1.8.

    python-cryptographyBetriebssysteme
    • Auf 38.0.4-3 aktualisieren
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  13. CVE-2018-10903

    Hoch · CVSS 7.5EPSS 3,2%Korrektur verfügbar

    CVE-2018-10903

    A flaw was found in python-cryptography versions between >=1.9.0 and <2.3. The finalize_with_tag API did not enforce a minimum tag length. If a user did not validate the input length prior to passing it to finalize_with_tag an attacker could craft an invalid payload with a shortened tag (e.g. 1 byte) such that they would have a 1 in 256 chance of passing the MAC check. GCM tag forgeries can cause key leakage.

    python-cryptographyBetriebssysteme
    • Auf 2.3-1 aktualisieren
    Veröffentlicht Aktualisiert
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