DEBIAN-CVE-2026-84185
A flaw was found in the jwcrypto library, which is used for implementing Javascript Object Signing and Encryption (JOSE) standards. The issue occurs when the library verifies a General JSON Serialization JWS using a set of keys. Due to a coding error, the library fails to correctly identify the specific key ID (kid) and may instead accept a signature made by any valid key in the set. This can allow an attacker with a valid key to bypass authorization checks in applications that rely on the key ID to identify specific tenants or users.
DEBIAN-CVE-2026-84185
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-2026-84185
python-jwcrypto
Source reference: /affected/0/package/name
- Affected versions
- 1.5.6-1
Source reference:
/affected/0/versions1.5.6-1.1Source reference:
/affected/0/versions1.5.6-1.1~deb13u1Source reference:
/affected/0/versions1.5.6-1.2Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
python-jwcrypto
Source reference: /affected/1/package/name
- Affected versions
- 1.5.6-1
Source reference:
/affected/1/versions1.5.6-1.1Source reference:
/affected/1/versions1.5.6-1.1~deb13u1Source reference:
/affected/1/versions1.5.6-1.2Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- 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-jwcrypto",
"purl": "pkg:deb/debian/python-jwcrypto?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.5.6-1",
"1.5.6-1.1",
"1.5.6-1.1~deb13u1",
"1.5.6-1.2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-84185.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "python-jwcrypto",
"purl": "pkg:deb/debian/python-jwcrypto?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.5.6-1",
"1.5.6-1.1",
"1.5.6-1.1~deb13u1",
"1.5.6-1.2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-84185.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #58387 · Revision 1
- Added to Heist Feed
- Publisher date