--- id: CVE-2026-26007 title: >- cryptography is a package designed to expose cryptographic primitives and recipes to Python developers summary: >- 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(), l… severity: medium cvss: 6.5 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N' cwe: - CWE-345 - CWE-354 vendor: cryptography.io product: cryptography affected: - cryptography < 46.0.5 patched: - cryptography 46.0.5 published: '2026-02-10' updated: '2026-09-10' sourceUpdated: '2026-09-10T13:17:55.693' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-26007' references: - url: >- https://github.com/pyca/cryptography/commit/0eebb9dbb6343d9bc1d91e5a2482ed4e054a6d8c label: security-advisories@github.com - url: >- https://github.com/pyca/cryptography/security/advisories/GHSA-r6ph-v2qm-q3c2 label: security-advisories@github.com - url: 'http://www.openwall.com/lists/oss-security/2026/02/10/4' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2026:10184' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:12176' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:13512' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:13545' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:13553' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:13672' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:19355' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:21431' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:21517' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:22330' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:22993' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2694' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:5168' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:5665' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:6308' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:6309' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:6497' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:6567' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:6568' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:7295' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/security/cve/CVE-2026-26007' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2438762' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26007.json label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://www.cve.org/CVERecord?id=CVE-2026-26007' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-26007' - url: 'https://github.com/pyca/cryptography' - url: 'https://github.com/pyca/cryptography/releases/tag/46.0.5' tags: - nvd - cve.org - csaf - vex - red-hat - osv - pip ssvc: exploitation: none automatable: 'no' technicalImpact: partial timestamp: '2026-02-11T21:28:38.864657Z' scores: nvd: 6.5 cna: 8.2 vendor: 7.4 epss: 0.00339 epssPercentile: 0.24556 ingestedAt: '2026-07-01T15:50:58.571Z' aliases: - GHSA-r6ph-v2qm-q3c2 - PYSEC-2026-2141 ecosystem: pip --- ## Overview 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. ## Affected - `cryptography < 46.0.5` ## Remediation Upgrade past the affected range: - `cryptography 46.0.5` ## Vendor advisories - **RHSA-2026:13512** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9 · released 2026-05-04 · [advisory](https://access.redhat.com/errata/RHSA-2026:13512) - **RHSA-2026:12176** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux HighAvailability (v. 8), Red Hat Enterprise Linux ResilientStorage (v. 8) · released 2026-04-30 · [advisory](https://access.redhat.com/errata/RHSA-2026:12176) - **RHSA-2026:22330** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux High Availability E4S (v.9.2), Red Hat Enterprise Linux Resilient Storage E4S (v.9.2) · released 2026-06-01 · [advisory](https://access.redhat.com/errata/RHSA-2026:22330) - **RHSA-2026:21517** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.4), Red Hat Enterprise Linux High Availability EUS (v.9.4), Red Hat Enterprise Linux Resilient Storage EUS (v.9.4) · released 2026-05-28 · [advisory](https://access.redhat.com/errata/RHSA-2026:21517) - **RHSA-2026:21431** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6) · released 2026-05-27 · [advisory](https://access.redhat.com/errata/RHSA-2026:21431) - **RHSA-2026:13672** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-05-05 · [advisory](https://access.redhat.com/errata/RHSA-2026:13672) - **RHSA-2026:19355** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-05-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:19355) - **RHSA-2026:6308** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.5 · released 2026-03-31 · [advisory](https://access.redhat.com/errata/RHSA-2026:6308) - **RHSA-2026:13553** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.5 · released 2026-05-04 · [advisory](https://access.redhat.com/errata/RHSA-2026:13553) - **RHSA-2026:13545** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.6 · released 2026-05-04 · [advisory](https://access.redhat.com/errata/RHSA-2026:13545) - **RHSA-2026:6309** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.6 · released 2026-03-31 · [advisory](https://access.redhat.com/errata/RHSA-2026:6309) - **Red Hat VEX** · Important · affected: OpenShift Lightspeed, Red Hat Ansible Automation Platform 2, Red Hat OpenShift AI (RHOAI), Red Hat Satellite 6, Red Hat Trusted Artifact Signer · no fix planned: Red Hat OpenShift AI (RHOAI), OpenShift Lightspeed, Red Hat Ansible Automation Platform 2, Red Hat Satellite 6, … · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26007.json) ## Package advisory (CVE-2026-26007) Affected packages: - `cryptography < 46.0.5` Patched in: - `cryptography 46.0.5` Source: https://osv.dev/vulnerability/GHSA-r6ph-v2qm-q3c2