CVE-2026-26007 (Medium) detected in cryptography-42.0.4-cp37-abi3-manylinux_2_28_x86_64.whl

[mend-bolt-for-github]

CVE-2026-26007 - Medium Severity Vulnerability

Vulnerable Library - cryptography-42.0.4-cp37-abi3-manylinux_2_28_x86_64.whl

cryptography is a package which provides cryptographic recipes and primitives to Python developers.

Library home page: https://files.pythonhosted.org/packages/35/ed/e8ad5637b8ac1fd1b48fadb11dcf3649083af5c4298dfdc81d0382de9191/cryptography-42.0.4-cp37-abi3-manylinux_2_28_x86_64.whl

Path to dependency file: /requirements.txt

Path to vulnerable library: /requirements.txt

Dependency Hierarchy:

• ❌ cryptography-42.0.4-cp37-abi3-manylinux_2_28_x86_64.whl (Vulnerable Library)

Found in base branch: main

Vulnerability Details

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 victim computes the shared secret as S = [victim_private_key]P via ECDH, this leaks information about victim_private_key mod (small_subgroup_order). For curves with cofactor > 1, this reveals the least significant bits of the private key. When these weak public keys are used in ECDSA , it's easy to forge signatures on the small subgroup. Only SECT curves are impacted by this. This vulnerability is fixed in 46.0.5.

Publish Date: 2026-02-10

URL: CVE-2026-26007

CVSS 3 Score Details (5.9)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: High
  • Integrity Impact: None
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-r6ph-v2qm-q3c2

Release Date: 2026-02-10

Fix Resolution: 46.0.5

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