CVE-2026-26007
CVE-2026-26007 · cryptography Subgroup Attack Due to Missing Subgroup Validation for SECT Curves
Diese Seite enthält Fakten aus öffentlichen Sicherheitsquellen. Lesen Sie vor dem Aktualisieren die Originalmeldung.
Diese Seite zeigt ausgewählte Angaben aus den Quellen. Die vollständige Beschreibung und betroffene Versionen finden Sie in den verlinkten Sicherheitshinweisen.
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.
CVSS 8.2 · Hoch · EPSS 0,4% · Korrektur verfügbar
- Veröffentlicht
- Aktualisiert
Technologie-Stack: system · python
Betroffene Produkte und Versionen
cryptography
- Softwareversionen
- < 46.0.5: Betroffen
Keine Korrektur veröffentlicht
python-cryptography Debian:12
- Softwareversionen
- 38.0.4-3
- 38.0.4-3+deb12u1
- 38.0.4-4
- 41.0.7-1
- 41.0.7-2
- 41.0.7-3
- 41.0.7-4
- 41.0.7-5
- 42.0.5-1
- 42.0.5-2
- 43.0.0-1
- 43.0.0-2
- 43.0.0-3
- 44.0.2-1
- 44.0.2-2
- 45.0.6-1
- 45.0.6-1~exp1
- 45.0.7-1
- 46.0.1-1
- 46.0.1-1~exp1
- 46.0.5-1
- 46.0.5-2
- 46.0.6-1
- 46.0.7-1
- 47.0.0-1
- 49.0.0-1
- 49.0.0-1~exp1
- 49.0.0-2
- Betroffene Versionsbereiche
- ECOSYSTEM: (−∞, +∞)
Keine Korrektur veröffentlicht
python-cryptography Debian:13
- Softwareversionen
- 43.0.0-3
- Betroffene Versionsbereiche
- ECOSYSTEM: < 43.0.0-3+deb13u1
Auf 43.0.0-3+deb13u1 aktualisieren
python-cryptography Debian:14
- Softwareversionen
- 43.0.0-3
- 44.0.2-1
- 44.0.2-2
- 45.0.6-1
- 45.0.6-1~exp1
- 45.0.7-1
- 46.0.1-1
- 46.0.1-1~exp1
- Betroffene Versionsbereiche
- ECOSYSTEM: < 46.0.5-1
Auf 46.0.5-1 aktualisieren
cryptography PyPI
- Softwareversionen
- 0.1
- 0.2
- 0.2.1
- 0.2.2
- 0.3
- 0.4
- 0.5
- 0.5.1
- 0.5.2
- 0.5.3
- 0.5.4
- 0.6
- 0.6.1
- 0.7
- 0.7.1
- 0.7.2
- 0.8
- 0.8.1
- 0.8.2
- 0.9
- 0.9.1
- 0.9.2
- 0.9.3
- 1.0
- 1.0.1
- 1.0.2
- 1.1
- 1.1.1
- 1.1.2
- 1.2
- 1.2.1
- 1.2.2
- 1.2.3
- 1.3
- 1.3.1
- 1.3.2
- 1.3.3
- 1.3.4
- 1.4
- 1.5
- 1.5.1
- 1.5.2
- 1.5.3
- 1.6
- 1.7
- 1.7.1
- 1.7.2
- 1.8
- 1.8.1
- 1.8.2
- 1.9
- 2.0
- 2.0.1
- 2.0.2
- 2.0.3
- 2.1
- 2.1.1
- 2.1.2
- 2.1.3
- 2.1.4
- 2.2
- 2.2.1
- 2.2.2
- 2.3
- 2.3.1
- 2.4
- 2.4.1
- 2.4.2
- 2.5
- 2.6
- 2.6.1
- 2.7
- 2.8
- 2.9
- 2.9.1
- 2.9.2
- 3.0
- 3.1
- 3.1.1
- 3.2
- 3.2.1
- 3.3
- 3.3.1
- 3.3.2
- 3.4
- 3.4.1
- 3.4.2
- 3.4.3
- 3.4.4
- 3.4.5
- 3.4.6
- 3.4.7
- 3.4.8
- 35.0.0
- 36.0.0
- 36.0.1
- 36.0.2
- 37.0.0
- 37.0.1
- 37.0.2
- 37.0.3
- 37.0.4
- 38.0.0
- 38.0.1
- 38.0.2
- 38.0.3
- 38.0.4
- 39.0.0
- 39.0.1
- 39.0.2
- 40.0.0
- 40.0.1
- 40.0.2
- 41.0.0
- 41.0.1
- 41.0.2
- 41.0.3
- 41.0.4
- 41.0.5
- 41.0.6
- 41.0.7
- 42.0.0
- 42.0.1
- 42.0.2
- 42.0.3
- 42.0.4
- 42.0.5
- 42.0.6
- 42.0.7
- 42.0.8
- 43.0.0
- 43.0.1
- 43.0.3
- 44.0.0
- 44.0.1
- 44.0.2
- 44.0.3
- 45.0.0
- 45.0.1
- 45.0.2
- 45.0.3
- 45.0.4
- 45.0.5
- 45.0.6
- 45.0.7
- 46.0.0
- 46.0.1
- 46.0.2
- 46.0.3
- 46.0.4
- Betroffene Versionsbereiche
- ECOSYSTEM: < 46.0.5
Auf 46.0.5 aktualisieren
python-cryptography Ubuntu:Pro:16.04:LTS
- Softwareversionen
- 1.0.1-1ubuntu1
- 1.0.2-1
- 1.1-1
- 1.1.1-1
- 1.1.1-1ubuntu1
- 1.1.1-1ubuntu2
- 1.1.1-1ubuntu3
- 1.2.2-2
- 1.2.3-1
- 1.2.3-1ubuntu0.1
- 1.2.3-1ubuntu0.2
- 1.2.3-1ubuntu0.3
- 1.2.3-1ubuntu0.3+esm1
- Betroffene Versionsbereiche
- ECOSYSTEM: < 1.2.3-1ubuntu0.3+esm3
Auf 1.2.3-1ubuntu0.3+esm3 aktualisieren
python-cryptography Ubuntu:Pro:18.04:LTS
- Softwareversionen
- 1.9-1
- 2.1.3-3
- 2.1.4-1
- 2.1.4-1build1
- 2.1.4-1build2
- 2.1.4-1ubuntu1
- 2.1.4-1ubuntu1.1
- 2.1.4-1ubuntu1.2
- 2.1.4-1ubuntu1.3
- 2.1.4-1ubuntu1.4
- 2.1.4-1ubuntu1.4+esm1
- Betroffene Versionsbereiche
- ECOSYSTEM: < 2.1.4-1ubuntu1.4+esm3
Auf 2.1.4-1ubuntu1.4+esm3 aktualisieren
python-cryptography Ubuntu:Pro:20.04:LTS
- Softwareversionen
- 2.6.1-3.1
- 2.6.1-4
- 2.6.1-4ubuntu1
- 2.8-1ubuntu2
- 2.8-2
- 2.8-3
- 2.8-3ubuntu0.1
- 2.8-3ubuntu0.2
- 2.8-3ubuntu0.3
- Betroffene Versionsbereiche
- ECOSYSTEM: < 2.8-3ubuntu0.3+esm2
Auf 2.8-3ubuntu0.3+esm2 aktualisieren
python-cryptography Ubuntu:22.04:LTS
- Softwareversionen
- 3.3.2-1
- 3.3.2-1build1
- 3.4.8-1
- 3.4.8-1ubuntu1
- 3.4.8-1ubuntu2
- 3.4.8-1ubuntu2.1
- 3.4.8-1ubuntu2.2
- Betroffene Versionsbereiche
- ECOSYSTEM: < 3.4.8-1ubuntu2.3
Auf 3.4.8-1ubuntu2.3 aktualisieren
python-cryptography Ubuntu:24.04:LTS
- Softwareversionen
- 38.0.4-4
- 38.0.4-4ubuntu1
- 41.0.7-3
- 41.0.7-4build2
- 41.0.7-4build3
- 41.0.7-4ubuntu0.1
- Betroffene Versionsbereiche
- ECOSYSTEM: < 41.0.7-4ubuntu0.3
Auf 41.0.7-4ubuntu0.3 aktualisieren
python-cryptography Ubuntu:25.10
- Softwareversionen
- 43.0.0-1ubuntu1
- Betroffene Versionsbereiche
- ECOSYSTEM: < 43.0.0-1ubuntu1.1
Auf 43.0.0-1ubuntu1.1 aktualisieren
Originalquellen
- https://github.com/pyca/cryptography/security/advisories/GHSA-r6ph-v2qm-q3c2
- https://github.com/pyca/cryptography/commit/0eebb9dbb6343d9bc1d91e5a2482ed4e054a6d8c
- http://www.openwall.com/lists/oss-security/2026/02/10/4
- https://access.redhat.com/security/cve/CVE-2026-26007
- https://bugzilla.redhat.com/show_bug.cgi?id=2438762
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26007.json
- https://access.redhat.com/errata/RHSA-2026:13512
- https://access.redhat.com/errata/RHSA-2026:12176
- https://access.redhat.com/errata/RHSA-2026:22330
- https://access.redhat.com/errata/RHSA-2026:21517
- https://access.redhat.com/errata/RHSA-2026:21431
- https://access.redhat.com/errata/RHSA-2026:13672
- https://access.redhat.com/errata/RHSA-2026:19355
- https://access.redhat.com/errata/RHSA-2026:6308
- https://access.redhat.com/errata/RHSA-2026:13553
- https://access.redhat.com/errata/RHSA-2026:13545
- https://access.redhat.com/errata/RHSA-2026:6309
- https://access.redhat.com/errata/RHSA-2026:2694
- https://access.redhat.com/errata/RHSA-2026:7295
- https://access.redhat.com/errata/RHSA-2026:10184
- https://access.redhat.com/errata/RHSA-2026:5665
- https://access.redhat.com/errata/RHSA-2026:6568
- https://access.redhat.com/errata/RHSA-2026:6497
- https://nvd.nist.gov/vuln/detail/CVE-2026-26007