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This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
Description
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.
Metrics
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[{"vendor":"Red Hat","product":"Red Hat Ansible Automation Platform 2.5 for RHEL 8","defaultStatus":"affected","cpes":["cpe:/a:redhat:ansible_automation_platform:2.5::el8","cpe:/a:redhat:ansible_automation_platform_developer:2.5::el8","cpe:/a:redhat:ansible_automation_platform_inside:2.5::el8"]},{"vendor":"Red Hat","product":"Red Hat Ansible Automation Platform 2.5 for RHEL 9","defaultStatus":"affected","cpes":["cpe:/a:redhat:ansible_automation_platform:2.5::el9","cpe:/a:redhat:ansible_automation_platform_developer:2.5::el9","cpe:/a:redhat:ansible_automation_platform_inside:2.5::el9"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream (v. 8)","defaultStatus":"affected","cpes":["cpe:/a:redhat:enterprise_linux:8::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream E4S (v.9.2)","defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_e4s:9.2::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream EUS (v.9.4)","defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_eus:9.4::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream EUS (v.9.6)","defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_eus:9.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream (v. 9)","defaultStatus":"affected","cpes":["cpe:/a:redhat:enterprise_linux:9::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux HighAvailability (v. 8)","defaultStatus":"affected","cpes":["cpe:/a:redhat:enterprise_linux:8::highavailability"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux High Availability E4S (v.9.2)","defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_e4s:9.2::highavailability"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux High Availability EUS (v.9.4)","defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_eus:9.4::highavailability"]},{"vendor":"Red Hat","product":"Red Hat Ansible Automation Platform 2.5","defaultStatus":"affected","cpes":["cpe:/a:redhat:ansible_automation_platform:2.5::el8"]
New CVE Received from GitHub, Inc.2/10/2026 5:17:00 PM
Action
Type
Old Value
New Value
Added
Description
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.
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