DEBIAN-CVE-2026-26007
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.
DEBIAN-CVE-2026-26007
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-26007
python-cryptography
Source reference: /affected/0/package/name
- Affected versions
- 38.0.4-3
Source reference:
/affected/0/versions38.0.4-3+deb12u1Source reference:
/affected/0/versions38.0.4-4Source reference:
/affected/0/versions41.0.7-1Source reference:
/affected/0/versions41.0.7-2Source reference:
/affected/0/versions41.0.7-3Source reference:
/affected/0/versions41.0.7-4Source reference:
/affected/0/versions41.0.7-5Source reference:
/affected/0/versions42.0.5-1Source reference:
/affected/0/versions42.0.5-2Source reference:
/affected/0/versions43.0.0-1Source reference:
/affected/0/versions43.0.0-2Source reference:
/affected/0/versions43.0.0-3Source reference:
/affected/0/versions44.0.2-1Source reference:
/affected/0/versions44.0.2-2Source reference:
/affected/0/versions45.0.6-1Source reference:
/affected/0/versions45.0.6-1~exp1Source reference:
/affected/0/versions45.0.7-1Source reference:
/affected/0/versions46.0.1-1Source reference:
/affected/0/versions46.0.1-1~exp1Source reference:
/affected/0/versions46.0.5-1Source reference:
/affected/0/versions46.0.5-2Source reference:
/affected/0/versions46.0.6-1Source reference:
/affected/0/versions46.0.7-1Source reference:
/affected/0/versions47.0.0-1Source reference:
/affected/0/versions49.0.0-1Source reference:
/affected/0/versions49.0.0-1~exp1Source reference:
/affected/0/versions49.0.0-2Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
python-cryptography
Source reference: /affected/1/package/name
- Affected versions
- 43.0.0-3
Source reference:
/affected/1/versions - Fixed versions
- 43.0.0-3+deb13u1
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
python-cryptography
Source reference: /affected/2/package/name
- Affected versions
- 43.0.0-3
Source reference:
/affected/2/versions44.0.2-1Source reference:
/affected/2/versions44.0.2-2Source reference:
/affected/2/versions45.0.6-1Source reference:
/affected/2/versions45.0.6-1~exp1Source reference:
/affected/2/versions45.0.7-1Source reference:
/affected/2/versions46.0.1-1Source reference:
/affected/2/versions46.0.1-1~exp1Source reference:
/affected/2/versions - Fixed versions
- 46.0.5-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "python-cryptography",
"purl": "pkg:deb/debian/python-cryptography?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-26007.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "43.0.0-3+deb13u1"
}
]
}
],
"package": {
"name": "python-cryptography",
"purl": "pkg:deb/debian/python-cryptography?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"43.0.0-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-26007.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "46.0.5-1"
}
]
}
],
"package": {
"name": "python-cryptography",
"purl": "pkg:deb/debian/python-cryptography?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-26007.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55894 · Revision 1
- Added to Heist Feed
- Publisher date