cryptography Subgroup Attack Due to Missing Subgroup Validation for SECT Curves
Summary
| CVE | CVE-2026-26007 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-02-10 22:17:00 UTC |
| Updated | 2026-07-20 12:18:19 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 8.2 HIGH from [email protected]
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS: 0.003410000 probability, percentile 0.264510000 (date 2026-07-20)
Problem Types: CWE-345 | CWE-354 | CWE-345 CWE-345: Insufficient Verification of Data Authenticity | CWE-354 Improper Validation of Integrity Check Value
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 8.2 | HIGH | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/C... |
| 4.0 | CNA | DECLARED | 8.2 | HIGH | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| 3.1 | [email protected] | Primary | 6.5 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
| 3.1 | ADP | CVSS | 7.4 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| 3.1 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | Secondary | 7.4 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
HighAttack Requirements
NonePrivileges Required
NoneUser Interaction
NoneConfidentiality
HighIntegrity
NoneAvailability
NoneSub Conf.
NoneSub Integrity
NoneSub Availability
NoneCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
RequiredScope
UnchangedConfidentiality
HighIntegrity
NoneAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Cryptography.io | Cryptography | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Pyca | Cryptography | affected < 46.0.5 | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2.5 For RHEL 8 | unaffected 0:4.6.28-3.el8ap * rpm | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2.5 For RHEL 9 | unaffected 0:4.6.28-3.el9ap * rpm | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux 8 | unaffected 0:4.2.1-129.el8_10.25 * rpm | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux 9 | unaffected 0:4.10.0-110.el9_8.2 * rpm | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux 9 | unaffected 0:4.10.0-98.el9_7.12 * rpm | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions | unaffected 0:4.10.0-43.el9_2.21 * rpm | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | unaffected 0:4.10.0-62.el9_4.24 * rpm | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | unaffected 0:4.10.0-86.el9_6.16 * rpm | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2.5 | unaffected 1774446874 * rpm | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2.5 | unaffected 1777403872 * rpm | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2.5 | unaffected 1774414699 * rpm | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2.6 | unaffected 1777296732 * rpm | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2.6 | unaffected 1774417022 * rpm | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2.6 | unaffected 1777398576 * rpm | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2.6 | unaffected 1774363040 * rpm | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2.6 | unaffected 1777387242 * rpm | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2.6 | unaffected 1777311601 * rpm | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2.6 | unaffected 1774644659 * rpm | Not specified |
| ADP | Red Hat | Red Hat Discovery 2 | unaffected 1770913597 * rpm | Not specified |
| ADP | Red Hat | Red Hat Hardened Images | unaffected 46.0.7-1.hum1 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776338381 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776343111 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776257621 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776413275 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776243239 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776243238 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776243299 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776243249 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776243309 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776336652 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776319193 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776319213 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776319200 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776319190 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776319179 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776319185 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776318795 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776319453 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776336534 * rpm | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | unaffected 1776319275 * rpm | Not specified |
| ADP | Red Hat | Red Hat Quay 3.1 | unaffected 1773971077 * rpm | Not specified |
| ADP | Red Hat | Red Hat Quay 3.15 | unaffected 1775169219 * rpm | Not specified |
| ADP | Red Hat | Red Hat Quay 3.16 | unaffected 1775069491 * rpm | Not specified |
| ADP | Red Hat | Red Hat Quay 3.16 | unaffected 1775169226 * rpm | Not specified |
| ADP | Red Hat | Red Hat Quay 3.9 | unaffected 1773936323 * rpm | Not specified |
| ADP | Red Hat | Red Hat Satellite 6.18 | unaffected 1780492008 * rpm | Not specified |
| ADP | Red Hat | OpenShift Lightspeed | Not specified | Not specified |
| ADP | Red Hat | OpenShift Lightspeed | Not specified | Not specified |
| ADP | Red Hat | Red Hat Advanced Cluster Management For Kubernetes 2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Advanced Cluster Management For Kubernetes 2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform Ansible Core 2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform Ansible Core 2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform Ansible Core 2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux 10 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux 8 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux 8 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux 9 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux 9 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux 9 | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| ADP | Red Hat | Red Hat Satellite 6 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Satellite 6 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Satellite 6 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Satellite 6 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Satellite 6 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Trusted Artifact Signer | Not specified | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| access.redhat.com/errata/RHSA-2026:7295 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:13512 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:19355 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| github.com/pyca/cryptography/commit/0eebb9dbb6343d9bc1d91e5a2482ed4e054a... | [email protected] | github.com | Patch |
| access.redhat.com/errata/RHSA-2026:13553 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| github.com/pyca/cryptography/security/advisories/GHSA-r6ph-v2qm-q3c2 | [email protected] | github.com | Vendor Advisory |
| access.redhat.com/errata/RHSA-2026:21431 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/security/cve/CVE-2026-26007 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:6568 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:10184 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:5168 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| www.openwall.com/lists/oss-security/2026/02/10/4 | af854a3a-2127-422b-91ae-364da2661108 | www.openwall.com | Mailing List, Third Party Advisory |
| access.redhat.com/errata/RHSA-2026:2694 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:6308 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:21517 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| bugzilla.redhat.com/show_bug.cgi | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | bugzilla.redhat.com | |
| access.redhat.com/errata/RHSA-2026:22993 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26007.json | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | security.access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:6309 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:12176 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:6567 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:13672 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:13545 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:22330 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:6497 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:5665 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| ADP | 2026-02-10T22:01:01.036Z | Reported to Red Hat. |
| ADP | 2026-02-10T21:42:56.471Z | Made public. |
Solutions
ADP: RHSA-2026:13512: Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9
ADP: RHSA-2026:12176: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux HighAvailability (v. 8), Red Hat Enterprise Linux ResilientStorage (v. 8)
ADP: RHSA-2026:22330: 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)
ADP: RHSA-2026:21517: 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)
ADP: RHSA-2026:21431: Red Hat Enterprise Linux AppStream EUS (v.9.6)
ADP: RHSA-2026:13672: Red Hat Enterprise Linux AppStream (v. 9)
ADP: RHSA-2026:19355: Red Hat Enterprise Linux AppStream (v. 9)
ADP: RHSA-2026:6308: Red Hat Ansible Automation Platform 2.5
ADP: RHSA-2026:13553: Red Hat Ansible Automation Platform 2.5
ADP: RHSA-2026:13545: Red Hat Ansible Automation Platform 2.6
ADP: RHSA-2026:6309: Red Hat Ansible Automation Platform 2.6
ADP: RHSA-2026:2694: Red Hat Discovery 2
ADP: RHSA-2026:7295: Red Hat Hardened Images
ADP: RHSA-2026:10184: Red Hat OpenShift AI 2.25
ADP: RHSA-2026:6568: Red Hat Quay 3.15
ADP: RHSA-2026:6497: Red Hat Quay 3.16
ADP: RHSA-2026:6567: Red Hat Quay 3.16
ADP: RHSA-2026:5665: Red Hat Quay 3.1
ADP: RHSA-2026:5168: Red Hat Quay 3.9
ADP: RHSA-2026:22993: Red Hat Satellite 6.18
Workarounds
ADP: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
There are currently no legacy QID mappings associated with this CVE.