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  4. CVE 2026 26007 cryptography subgroup attack due to missing
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Back to active CVEs
High ยท CVSS 8.2CVE-2026-26007

cryptography Subgroup Attack Due to Missing Subgroup Validation for SECT CurvesCVE-2026-26007

Answer in brief

CVE-2026-26007 records a High severity (CVSS 8.2) vulnerability in cryptography Subgroup Attack Due to Missing Subgroup Validation for SECT Curves. The current sources do not mark it as known exploited. The current feed maps Red Hat/ansible-automation-platform-26/controller-rhel9 (generic), Red Hat/ansible-automation-platform-26/gateway-rhel9 (generic), Red Hat/ansible-automation-platform/automation-dashboard-rhel9 (generic), Red Hat/ansible-automation-platform-tech-preview/automation-dashboard-rhel9 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Feb 10, 2026Updated Sep 16, 2026Source checked Nov 3, 2026First seen by HOL Jul 1, 2026Material review Sep 16, 2026
Upstream Advisory

Key facts

Risk
High ยท CVSS 8.2
Exploitation
Not marked as known exploited
Affected software
16 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/ansible-automation-platform-26/controller-rhel9 (generic), Red Hat/ansible-automation-platform-26/gateway-rhel9 (generic), Red Hat/ansible-automation-platform/automation-dashboard-rhel9 (generic), Red Hat/ansible-automation-platform-tech-preview/automation-dashboard-rhel9 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:cryptography.io:cryptography:*:*:*:*:*:python:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/ansible-automation-platform-26/controller-rhel9generic*Not reported
Red Hat/ansible-automation-platform-26/gateway-rhel9generic*Not reported
Red Hat/ansible-automation-platform/automation-dashboard-rhel9generic*Not reported
Red Hat/ansible-automation-platform-tech-preview/automation-dashboard-rhel9generic*Not reported
pyca/cryptographygeneric<46.0.546.0.5
Red Hat/openshift-lightspeed/lightspeed-ocp-rag-rhel9generic*Not reported
Red Hat/openshift-lightspeed/lightspeed-service-api-rhel9generic*Not reported
Red Hat/python3.12-cryptographygeneric*Not reported
Red Hat/rhoai/odh-llama-stack-core-rhel9generic*Not reported
Red Hat/rhoai/odh-trustyai-ragas-lls-provider-dsp-rhel9generic*Not reported
Red Hat/rhtas/model-transparency-rhel9generic*Not reported
Red Hat/satellite/iop-advisor-engine-rhel9generic*Not reported
Red Hat/satellite/iop-host-inventory-rhel9generic*Not reported
Red Hat/satellite/iop-insights-engine-rhel9generic*Not reported
Red Hat/satellite/iop-vmaas-rhel9generic*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/ansible-automation-platform-26/controller-rhel9, Red Hat/ansible-automation-platform-26/gateway-rhel9, Red Hat/ansible-automation-platform/automation-dashboard-rhel9.
  2. 2Review the reported fix. Update pyca/cryptography to 46.0.5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Feb 10, 2026

    Evidence: source:cvelist:source_dates:source-dates:record
  2. Source modified

    Sep 16, 2026

    Evidence: source:cvelist:source_dates:source-dates:record
  3. First seen by HOL

    Jul 1, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
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  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencesecurity.access.redhat.com
  • Source referenceopenwall.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Secret Exfiltration
EPSS
Not reported
CWE IDs
CWE-345, CWE-354
Source
CVE List V5
Source checked
Nov 3, 2026
References
26 linked sources
Open source record